From f16a4a3493038c775a4f1293b0764d94b9ddb986 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Fri, 6 Oct 2023 16:23:57 +0200
Subject: [PATCH 01/29] Improve the readability of parent project references

---
 java/src/main/java/nl/mauritssilvis/types/java/string/README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/java/src/main/java/nl/mauritssilvis/types/java/string/README.md b/java/src/main/java/nl/mauritssilvis/types/java/string/README.md
index cc90212..358e5a9 100644
--- a/java/src/main/java/nl/mauritssilvis/types/java/string/README.md
+++ b/java/src/main/java/nl/mauritssilvis/types/java/string/README.md
@@ -4,7 +4,7 @@
 
 ## Introduction
 
-With this part of the [Types](https://github.com/mauritssilvis/types) > [Java](../../../../../../../..) project, I provide implementations of the string data type in Java.
+With this part of the [Java types](../../../../../../../..) project, I provide implementations of the string data type in Java.
 
 Below, I give an overview of the different [implementations](#1-implementations) I considered.
 

From 1a1ed2c0ba0cfbae6dccdf573562cb3aaaf02f76 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 13:49:15 +0200
Subject: [PATCH 02/29] Update the keep a changelog version

---
 CHANGELOG.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3042ef1..2c3b631 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 All notable changes to the [Types](https://github.com/mauritssilvis/types) project are documented in this file.
 
-The file format is based on [keep a changelog](https://keepachangelog.com/en/1.0.0/),
+The file format is based on [keep a changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [semantic versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [0.1.0] - 2023-09-16

From bf39b7811e0b34cf5780cc74ba65eb0ceca970cd Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 16:32:14 +0200
Subject: [PATCH 03/29] Polish readme

---
 README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index e87b856..d92fcea 100644
--- a/README.md
+++ b/README.md
@@ -43,13 +43,13 @@ I specifically provide the following (partial) data type and structure implement
 
 ## 3. Background
 
-More information on the data types and structures I focus on in this project is given in the following.
+Below, I give general information on the data types and structures I focus on in this project.
 
 ### 3.1 String
 
 Next to numeric types like integers and floating point numbers, strings arguably are one of the most commonly used data types in programming.
 Essentially, strings are arrays of characters.
-However, despite this seeming simplicity, strings can store everything from single words to names, email addresses, codes like passwords and even full texts.
+However, despite this seeming simplicity, strings can store everything from single words to names, email addresses, passwords and even full texts.
 
 In many programming languages, including Java, strings are represented by immutable objects.
 Immutable objects are objects that cannot be changed once they are created.

From 6985255d9c0b0edf20fcff04db8e58726a6e20ab Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 16:44:39 +0200
Subject: [PATCH 04/29] Adapt section title

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index d92fcea..2cad3a9 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,7 @@ I specifically provide the following (partial) data type and structure implement
 
 Below, I give general information on the data types and structures I focus on in this project.
 
-### 3.1 String
+### 3.1 Strings
 
 Next to numeric types like integers and floating point numbers, strings arguably are one of the most commonly used data types in programming.
 Essentially, strings are arrays of characters.

From 230799393ecd351d3827d7e010d14dc695ac837c Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 17:08:28 +0200
Subject: [PATCH 05/29] Add IntelliJ IDEA inspections

---
 java/.idea/inspectionProfiles/All.xml | 50 ++++++++++++++++++++++++---
 1 file changed, 45 insertions(+), 5 deletions(-)

diff --git a/java/.idea/inspectionProfiles/All.xml b/java/.idea/inspectionProfiles/All.xml
index a2b8fc5..6d91a10 100644
--- a/java/.idea/inspectionProfiles/All.xml
+++ b/java/.idea/inspectionProfiles/All.xml
@@ -17,6 +17,9 @@
       <option name="nonThreadSafeTypes" value="" />
     </inspection_tool>
     <inspection_tool class="AccessToStaticFieldLockedOnInstance" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="AddConversionCallMigration" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="AlphaUnsortedPropertiesFile" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
+    <inspection_tool class="AmbiguousExpressionInWhenBranchMigration" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="AmbiguousFieldAccess" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="AmbiguousMethodCall" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="AnonymousClassComplexity" enabled="true" level="WARNING" enabled_by_default="true">
@@ -98,6 +101,7 @@
     <inspection_tool class="CallToStringConcatCanBeReplacedByOperator" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="CallToSuspiciousStringMethod" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="CastConflictsWithInstanceof" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="CastDueToProgressionResolutionChangeMigration" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="CastThatLosesPrecision" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="ignoreIntegerCharCasts" value="false" />
       <option name="ignoreOverflowingByteCasts" value="false" />
@@ -202,6 +206,8 @@
     </inspection_tool>
     <inspection_tool class="ContinueStatement" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ContinueStatementWithLabel" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="ConvertJavadoc" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="ConvertOldAnnotations" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="CovariantEquals" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="CustomClassloader" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="CustomSecurityManager" enabled="true" level="WARNING" enabled_by_default="true" />
@@ -215,12 +221,16 @@
       <option name="ignoreLocalVariables" value="false" />
       <option name="ignorePrivateMethodsAndFields" value="false" />
     </inspection_tool>
+    <inspection_tool class="DeclaringClassMigration" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="DeconstructionCanBeUsed" enabled="true" level="INFORMATION" enabled_by_default="true" />
     <inspection_tool class="DefaultNotLastCaseInSwitch" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="DesignForExtension" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="Destructure" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
     <inspection_tool class="DisjointPackage" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="DollarSignInName" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="DoubleLiteralMayBeFloatLiteral" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="DriverManagerGetConnection" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="DuplicatePropertyInspection" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="DuplicateStringLiteralInspection" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="MIN_STRING_LENGTH" value="5" />
       <option name="IGNORE_PROPERTY_KEYS" value="false" />
@@ -247,6 +257,7 @@
     <inspection_tool class="ExceptionNameDoesntEndWithException" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ExceptionPackage" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ExpectedExceptionNeverThrown" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="ExpectedExceptionNeverThrownTestNG" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ExtendsConcreteCollection" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ExtendsThread" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ExtendsThrowable" enabled="true" level="WARNING" enabled_by_default="true" />
@@ -282,6 +293,8 @@
     <inspection_tool class="ForLoopWithMissingComponent" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="ignoreCollectionLoops" value="false" />
     </inspection_tool>
+    <inspection_tool class="FromClosedRangeMigration" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
+    <inspection_tool class="GradleKotlinxCoroutinesDeprecation" enabled="true" level="ERROR" enabled_by_default="true" />
     <inspection_tool class="HardCodedStringLiteral" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="ignoreForAssertStatements" value="true" />
       <option name="ignoreForExceptionConstructors" value="true" />
@@ -321,10 +334,12 @@
       <option name="ignoreCharConversions" value="false" />
       <option name="ignoreConstantConversions" value="false" />
     </inspection_tool>
+    <inspection_tool class="IncompleteDestructuring" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="InconsistentLanguageLevel" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="InconsistentLineSeparators" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="IncorrectFormatting" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
     <inspection_tool class="IncrementDecrementUsedAsExpression" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="InlineClassDeprecatedMigration" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="InnerClassOnInterface" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="m_ignoreInnerInterfaces" value="false" />
     </inspection_tool>
@@ -362,11 +377,14 @@
       <option name="insideTryAllowed" value="false" />
     </inspection_tool>
     <inspection_tool class="JUnit5Converter" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="JUnitTestNG" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="JavaAnnotator" enabled="true" level="ERROR" enabled_by_default="true" />
     <inspection_tool class="JavaLangImport" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="JavadocHtmlLint" enabled="true" level="ERROR" enabled_by_default="true" />
+    <inspection_tool class="KDocMissingDocumentation" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="KeySetIterationMayUseEntrySet" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="KotlinAnnotator" enabled="true" level="ERROR" enabled_by_default="true" />
+    <inspection_tool class="KotlinLoggerInitializedWithForeignClass" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="LabeledStatement" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="LambdaParameterHidingMemberVariable" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="LambdaParameterNamingConvention" enabled="true" level="WARNING" enabled_by_default="true" />
@@ -407,6 +425,7 @@
     <inspection_tool class="MagicNumber" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="MapReplaceableByEnumMap" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="MarkerInterface" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="MavenCoroutinesDeprecation" enabled="true" level="ERROR" enabled_by_default="true" />
     <inspection_tool class="MethodCallInLoopCondition" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="MethodCount" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="m_limit" value="20" />
@@ -485,6 +504,7 @@
     </inspection_tool>
     <inspection_tool class="NewExceptionWithoutArguments" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="NewMethodNamingConvention" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="NoConstructorMigration" enabled="true" level="ERROR" enabled_by_default="true" />
     <inspection_tool class="NonBooleanMethodNameMayNotStartWithQuestion" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="questionString" value="are,can,check,contains,could,endsWith,equals,has,is,matches,must,shall,should,startsWith,was,were,will,would" />
       <option name="ignoreBooleanMethods" value="false" />
@@ -494,12 +514,14 @@
       <option name="m_limit" value="30" />
     </inspection_tool>
     <inspection_tool class="NonExceptionNameEndsWithException" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="NonExhaustiveWhenStatementMigration" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="NonFinalClone" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="NonFinalFieldInImmutable" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="NonFinalFieldOfException" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="NonFinalGuard" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="NonFinalStaticVariableUsedInClassInitialization" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="NonFinalUtilityClass" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="NonNullableBooleanPropertyInExternalInterface" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="NonProtectedConstructorInAbstractClass" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="m_ignoreNonPublicClasses" value="false" />
     </inspection_tool>
@@ -514,7 +536,6 @@
     </inspection_tool>
     <inspection_tool class="NonSerializableObjectBoundToHttpSession" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="NonSerializableObjectPassedToObjectStream" enabled="true" level="WARNING" enabled_by_default="true" />
-    <inspection_tool class="NonSerializableWithSerialVersionUIDField" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="NonSerializableWithSerializationMethods" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="NonShortCircuitBoolean" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="NonStaticFinalLogger" enabled="true" level="WARNING" enabled_by_default="true">
@@ -534,6 +555,8 @@
     <inspection_tool class="ObsoleteCollection" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="ignoreRequiredObsoleteCollectionTypes" value="true" />
     </inspection_tool>
+    <inspection_tool class="ObsoleteExperimentalCoroutines" enabled="true" level="ERROR" enabled_by_default="true" />
+    <inspection_tool class="ObsoleteKotlinJsPackages" enabled="true" level="ERROR" enabled_by_default="true" />
     <inspection_tool class="OctalAndDecimalIntegersMixed" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="OnDemandImport" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="OptionalContainsCollection" enabled="true" level="WARNING" enabled_by_default="true" />
@@ -557,6 +580,7 @@
     </inspection_tool>
     <inspection_tool class="OverridableMethodCallDuringObjectConstruction" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="OverriddenMethodCallDuringObjectConstruction" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="OverrideDeprecatedMigration" enabled="true" level="ERROR" enabled_by_default="true" />
     <inspection_tool class="PackageDotHtmlMayBePackageInfo" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="PackageInMultipleModules" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="PackageNamingConvention" enabled="true" level="WARNING" enabled_by_default="true">
@@ -601,12 +625,17 @@
     <inspection_tool class="PrivateMemberAccessBetweenOuterAndInnerClass" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ProblematicVarargsMethodOverride" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ProblematicWhitespace" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="ProhibitJvmOverloadsOnConstructorsOfAnnotationClassesMigration" enabled="true" level="ERROR" enabled_by_default="true" />
+    <inspection_tool class="ProhibitRepeatedUseSiteTargetAnnotationsMigration" enabled="true" level="ERROR" enabled_by_default="true" />
+    <inspection_tool class="ProhibitTypeParametersForLocalVariablesMigration" enabled="true" level="ERROR" enabled_by_default="true" />
+    <inspection_tool class="ProhibitUseSiteTargetAnnotationsOnSuperTypesMigration" enabled="true" level="ERROR" enabled_by_default="true" />
     <inspection_tool class="PropertyValueSetToItself" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ProtectedField" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ProtectedInnerClass" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="ignoreEnums" value="false" />
       <option name="ignoreInterfaces" value="false" />
     </inspection_tool>
+    <inspection_tool class="PublicApiImplicitType" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
     <inspection_tool class="PublicConstructor" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="PublicConstructorInNonPublicClass" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="PublicFieldAccessedInSynchronizedContext" enabled="true" level="WARNING" enabled_by_default="true" />
@@ -639,7 +668,15 @@
       <option name="ignoreSerializable" value="false" />
       <option name="ignoreCloneable" value="false" />
     </inspection_tool>
+    <inspection_tool class="RedundantInnerClassModifier" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="RedundantLabelMigration" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
     <inspection_tool class="RedundantModifiersUtilityClassLombok" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="RedundantNotNullExtensionReceiverOfInline" enabled="true" level="INFORMATION" enabled_by_default="true" />
+    <inspection_tool class="RedundantValueArgument" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
+    <inspection_tool class="RegExpAnonymousGroup" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="ReplaceCollectionCountWithSize" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
+    <inspection_tool class="ReplaceNotNullAssertionWithElvisReturn" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
+    <inspection_tool class="RestrictReturnStatementTargetMigration" enabled="true" level="ERROR" enabled_by_default="true" />
     <inspection_tool class="ResultOfObjectAllocationIgnored" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ResultSetIndexZero" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ReturnNull" enabled="true" level="WARNING" enabled_by_default="true">
@@ -655,7 +692,6 @@
     <inspection_tool class="SafeLock" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="SamePackageImport" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="SerialPersistentFieldsWithWrongSignature" enabled="true" level="WARNING" enabled_by_default="true" />
-    <inspection_tool class="SerialVersionUIDNotStaticFinal" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="SerializableDeserializableClassInSecureContext" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="SerializableHasSerialVersionUIDField" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="SerializableHasSerializationMethods" enabled="true" level="WARNING" enabled_by_default="true">
@@ -681,7 +717,6 @@
     <inspection_tool class="SingleCharacterStartsWith" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="SingleClassImport" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="Singleton" enabled="true" level="WARNING" enabled_by_default="true" />
-    <inspection_tool class="SizeReplaceableByIsEmpty" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="SleepWhileHoldingLock" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="SocketResource" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="insideTryAllowed" value="false" />
@@ -697,6 +732,7 @@
     <inspection_tool class="StaticInheritance" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="StaticMethodOnlyUsedInOneClass" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="StaticNonFinalField" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="StaticPseudoFunctionalStyleMethod" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="StaticVariableInitialization" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="m_ignorePrimitives" value="false" />
     </inspection_tool>
@@ -719,7 +755,6 @@
     <inspection_tool class="StringConcatenationInFormatCall" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="StringConcatenationInMessageFormatCall" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="StringConcatenationMissingWhitespace" enabled="true" level="WARNING" enabled_by_default="true" />
-    <inspection_tool class="StringEqualsEmptyString" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="StringReplaceableByStringBuffer" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="onlyWarnOnLoop" value="true" />
     </inspection_tool>
@@ -731,6 +766,7 @@
     <inspection_tool class="SuspiciousArrayCast" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="SuspiciousGetterSetter" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="SuspiciousLiteralUnderscore" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="SuspiciousLocalesLanguages" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="SwitchStatement" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="SwitchStatementDensity" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="m_limit" value="20" />
@@ -774,7 +810,6 @@
     <inspection_tool class="ThrowCaughtLocally" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="ignoreRethrownExceptions" value="false" />
     </inspection_tool>
-    <inspection_tool class="ThrowablePrintStackTrace" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ThrownExceptionsPerMethod" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="m_limit" value="3" />
     </inspection_tool>
@@ -794,6 +829,7 @@
     <inspection_tool class="TypeParameterExtendsFinalClass" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="UncheckedExceptionClass" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="UnconditionalWait" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="UndeclaredTests" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="UnknownGuard" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="UnnecessarilyQualifiedStaticUsage" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="m_ignoreStaticFieldAccesses" value="false" />
@@ -826,7 +862,9 @@
     <inspection_tool class="UnsecureRandomNumberGeneration" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="UnstableTypeUsedInSignature" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="UnusedLibrary" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="UnusedMainParameter" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
     <inspection_tool class="UpperCaseFieldNameNotConstant" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="UseEllipsisInPropertyInspection" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="UseOfAWTPeerClass" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="UseOfAnotherObjectsPrivateField" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="ignoreSameClass" value="false" />
@@ -861,11 +899,13 @@
     <inspection_tool class="WaitNotifyNotInSynchronizedContext" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="WaitOrAwaitWithoutTimeout" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="WaitWithoutCorrespondingNotify" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="WarningOnMainUnusedParameterMigration" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
     <inspection_tool class="WeakerAccess" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="SUGGEST_PACKAGE_LOCAL_FOR_MEMBERS" value="true" />
       <option name="SUGGEST_PACKAGE_LOCAL_FOR_TOP_CLASSES" value="true" />
       <option name="SUGGEST_PRIVATE_FOR_INNERS" value="false" />
     </inspection_tool>
+    <inspection_tool class="WhenWithOnlyElse" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
     <inspection_tool class="ZeroLengthArrayInitialization" enabled="true" level="WARNING" enabled_by_default="true" />
   </profile>
 </component>
\ No newline at end of file

From 07f262ac2889a3807ce61507624da81503bbe249 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 17:13:39 +0200
Subject: [PATCH 06/29] Adapt IntelliJ IDEA project file

---
 java/.idea/misc.xml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/java/.idea/misc.xml b/java/.idea/misc.xml
index 7cf2219..ca04e22 100644
--- a/java/.idea/misc.xml
+++ b/java/.idea/misc.xml
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
   <component name="ProjectRootManager" version="2" languageLevel="JDK_20" default="true" project-jdk-name="temurin-20" project-jdk-type="JavaSDK" />

From 587aa787ca19b9ed4b618d847487d349c8a10914 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 17:23:30 +0200
Subject: [PATCH 07/29] Update the Gradle version

---
 java/gradle/wrapper/gradle-wrapper.properties |  2 +-
 java/gradlew                                  | 14 +++++++-------
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/java/gradle/wrapper/gradle-wrapper.properties b/java/gradle/wrapper/gradle-wrapper.properties
index ac72c34..3fa8f86 100644
--- a/java/gradle/wrapper/gradle-wrapper.properties
+++ b/java/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/java/gradlew b/java/gradlew
index 0adc8e1..1aa94a4 100644
--- a/java/gradlew
+++ b/java/gradlew
@@ -145,7 +145,7 @@ if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
         # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045
+        # shellcheck disable=SC2039,SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
@@ -153,7 +153,7 @@ if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
       '' | soft) :;; #(
       *)
         # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045
+        # shellcheck disable=SC2039,SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -202,11 +202,11 @@ fi
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
-# Collect all arguments for the java command;
-#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
-#     shell script including quotes and variable substitutions, so put them in
-#     double quotes to make sure that they get re-expanded; and
-#   * put everything else in single quotes, so that it's not re-expanded.
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \

From 220b48663b452bbcf60037120707aff0b4f48540 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 17:24:00 +0200
Subject: [PATCH 08/29] Set the snapshot version

---
 java/gradle/libs.versions.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/java/gradle/libs.versions.toml b/java/gradle/libs.versions.toml
index b8f2ac2..acf6fe1 100644
--- a/java/gradle/libs.versions.toml
+++ b/java/gradle/libs.versions.toml
@@ -4,7 +4,7 @@
 
 java-jdk = "20"
 
-java-types = "0.1.0"
+java-types = "0.2.0-SNAPSHOT"
 
 junit-jupiter = "5.10.0"
 

From 61b78c4dd6d913bb5887a0b3b74e8719cb3bc719 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 17:24:40 +0200
Subject: [PATCH 09/29] Update the Java version

---
 java/build.gradle.kts          | 3 ++-
 java/gradle/libs.versions.toml | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/java/build.gradle.kts b/java/build.gradle.kts
index 87d2721..8d9dfd8 100644
--- a/java/build.gradle.kts
+++ b/java/build.gradle.kts
@@ -24,7 +24,8 @@ dependencies {
 java {
     toolchain {
         languageVersion.set(JavaLanguageVersion.of(libs.versions.java.jdk.get()))
-        vendor.set(JvmVendorSpec.ADOPTIUM)
+        // TODO: Reset to JvmVendorSpec.ADOPTIUM
+        vendor.set(JvmVendorSpec.ORACLE)
     }
 }
 
diff --git a/java/gradle/libs.versions.toml b/java/gradle/libs.versions.toml
index acf6fe1..50538fc 100644
--- a/java/gradle/libs.versions.toml
+++ b/java/gradle/libs.versions.toml
@@ -2,7 +2,7 @@
 
 [versions]
 
-java-jdk = "20"
+java-jdk = "21"
 
 java-types = "0.2.0-SNAPSHOT"
 

From ff40c05e7e22917b9fc0a7efa52418b21f046093 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 17:27:00 +0200
Subject: [PATCH 10/29] Select the project JDK

---
 java/.idea/misc.xml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/java/.idea/misc.xml b/java/.idea/misc.xml
index ca04e22..94addd1 100644
--- a/java/.idea/misc.xml
+++ b/java/.idea/misc.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_20" default="true" project-jdk-name="temurin-20" project-jdk-type="JavaSDK" />
+  <!-- TODO: Set project-jdk-name to temurin-21 -->
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" project-jdk-name="21" project-jdk-type="JavaSDK" />
 </project>
\ No newline at end of file

From 74a0eef69bd14c689a3b6dca04d8e394f1d6f693 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 17:31:17 +0200
Subject: [PATCH 11/29] Add a Git attributes files

---
 .gitattributes | 4 ++++
 1 file changed, 4 insertions(+)
 create mode 100644 .gitattributes

diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..0a0f148
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,4 @@
+# https://help.github.com/articles/dealing-with-line-endings/
+* text eol=lf
+
+*.bat text eol=crlf

From a027e3c104adcd25bd73dbc8cbf88a2c4be4964d Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 17:47:50 +0200
Subject: [PATCH 12/29] Polish readme

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 2cad3a9..544efe3 100644
--- a/README.md
+++ b/README.md
@@ -49,7 +49,7 @@ Below, I give general information on the data types and structures I focus on in
 
 Next to numeric types like integers and floating point numbers, strings arguably are one of the most commonly used data types in programming.
 Essentially, strings are arrays of characters.
-However, despite this seeming simplicity, strings can store everything from single words to names, email addresses, passwords and even full texts.
+However, despite this seeming simplicity, strings can store anything from single words to names, email addresses, passwords and even full texts.
 
 In many programming languages, including Java, strings are represented by immutable objects.
 Immutable objects are objects that cannot be changed once they are created.

From 4768aabc1e285cce02a45f75cd9d47b2adf89057 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 17:49:24 +0200
Subject: [PATCH 13/29] Polish readme

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 544efe3..a680397 100644
--- a/README.md
+++ b/README.md
@@ -58,7 +58,7 @@ Since we then end up with more objects, immutability could be considered a disad
 However, consider using strings as keys for a hash map.
 If strings were mutable, you could change those keys by changing the used strings.
 The immutability of strings prevents such changes, thus preventing unexpected situations and potential bugs.
-Mutable and immutable strings, thus, both have their role.
+Mutable and immutable strings, thus, both have their advantages and disadvantages.
 
 ## License
 

From 73b19b4afe9b1e5fd2029406a401e963df6a2987 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 17:55:07 +0200
Subject: [PATCH 14/29] Introduce a table with implement types

---
 java/README.md | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/java/README.md b/java/README.md
index 034d02c..3dcb519 100644
--- a/java/README.md
+++ b/java/README.md
@@ -12,9 +12,10 @@ Below, I give an [overview](#overview) of the available implementations.
 
 Currently, (partial) Java implementations of the following data types and structures are available:
 
-- [String](src/main/java/nl/mauritssilvis/types/java/string)
-
-  - [Immutable string](src/main/java/nl/mauritssilvis/types/java/string#11-immutable-strings)
+| Data type or structure                                                                      |
+|---------------------------------------------------------------------------------------------|
+| [String](src/main/java/nl/mauritssilvis/types/java/string)                                  |
+| • [Immutable string](src/main/java/nl/mauritssilvis/types/java/string#11-immutable-strings) |
 
 ## License
 

From 70d91250a46e5e6c576c48dc393a8914c87493ec Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 17:58:37 +0200
Subject: [PATCH 15/29] Update the refreshVersions version

---
 java/settings.gradle.kts | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/java/settings.gradle.kts b/java/settings.gradle.kts
index 599951a..01afbe3 100644
--- a/java/settings.gradle.kts
+++ b/java/settings.gradle.kts
@@ -5,8 +5,7 @@
 
 plugins {
     id("org.gradle.toolchains.foojay-resolver-convention") version "0.7.0"
-    id("de.fayard.refreshVersions") version "0.60.2"
+    id("de.fayard.refreshVersions") version "0.60.3"
 }
 
 rootProject.name = "java-types"
-

From b6bbbdffb13cd5bd3b08fb147956da49ea4a0d53 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 18:04:41 +0200
Subject: [PATCH 16/29] Document changes

---
 CHANGELOG.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c3b631..d14ee6c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,14 @@ All notable changes to the [Types](https://github.com/mauritssilvis/types) proje
 The file format is based on [keep a changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [semantic versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Changed
+
+- Update the Java version from 20 to 21.
+- Update the Gradle version from 8.3 to 8.4.
+- Update the refreshVersions version from 0.60.2 to 0.60.3.
+
 ## [0.1.0] - 2023-09-16
 
 ### Added

From 4f27bde7336b96b0d035169a49f4f688b6ad9407 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 18:05:08 +0200
Subject: [PATCH 17/29] Set the default project JDK

---
 java/.idea/misc.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/java/.idea/misc.xml b/java/.idea/misc.xml
index 94addd1..c4e4f59 100644
--- a/java/.idea/misc.xml
+++ b/java/.idea/misc.xml
@@ -2,5 +2,5 @@
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
   <!-- TODO: Set project-jdk-name to temurin-21 -->
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" project-jdk-name="21" project-jdk-type="JavaSDK" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK" />
 </project>
\ No newline at end of file

From d501936369c5ab43c71413a4ca8ce4dc0347a44c Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 18:13:16 +0200
Subject: [PATCH 18/29] Use relative in-project references

---
 java/README.md                                                  | 2 +-
 java/src/main/java/nl/mauritssilvis/types/java/string/README.md | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/java/README.md b/java/README.md
index 3dcb519..f029877 100644
--- a/java/README.md
+++ b/java/README.md
@@ -4,7 +4,7 @@
 
 ## Introduction
 
-With this part of the [Types](https://github.com/mauritssilvis/types) project, I provide implementations of commonly used data types and structures in Java.
+With this part of the [Types](..) project, I provide implementations of commonly used data types and structures in Java.
 
 Below, I give an [overview](#overview) of the available implementations.
 
diff --git a/java/src/main/java/nl/mauritssilvis/types/java/string/README.md b/java/src/main/java/nl/mauritssilvis/types/java/string/README.md
index 358e5a9..163d73c 100644
--- a/java/src/main/java/nl/mauritssilvis/types/java/string/README.md
+++ b/java/src/main/java/nl/mauritssilvis/types/java/string/README.md
@@ -8,7 +8,7 @@ With this part of the [Java types](../../../../../../../..) project, I provide i
 
 Below, I give an overview of the different [implementations](#1-implementations) I considered.
 
-General information about the string data type can be found in the [string section](https://github.com/mauritssilvis/types#31-string) of the [Types](https://github.com/mauritssilvis/types) readme.
+General information about the string data type can be found in the [string section](../../../../../../../../../#31-string) of the [Types](../../../../../../../../..) readme.
 
 ## 1. Implementations
 

From a125356ba8c74a972c4abc592bf6179bd65f0bf4 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 18:14:31 +0200
Subject: [PATCH 19/29] Fix section reference

---
 java/src/main/java/nl/mauritssilvis/types/java/string/README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/java/src/main/java/nl/mauritssilvis/types/java/string/README.md b/java/src/main/java/nl/mauritssilvis/types/java/string/README.md
index 163d73c..5c09c91 100644
--- a/java/src/main/java/nl/mauritssilvis/types/java/string/README.md
+++ b/java/src/main/java/nl/mauritssilvis/types/java/string/README.md
@@ -8,7 +8,7 @@ With this part of the [Java types](../../../../../../../..) project, I provide i
 
 Below, I give an overview of the different [implementations](#1-implementations) I considered.
 
-General information about the string data type can be found in the [string section](../../../../../../../../../#31-string) of the [Types](../../../../../../../../..) readme.
+General information about the string data type can be found in the [string section](../../../../../../../../../#31-strings) of the [Types](../../../../../../../../..) readme.
 
 ## 1. Implementations
 

From 8383bac33fc6aa1e55855576e53ea5754180dc1f Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 18:17:03 +0200
Subject: [PATCH 20/29] Adapt section reference

---
 java/src/main/java/nl/mauritssilvis/types/java/string/README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/java/src/main/java/nl/mauritssilvis/types/java/string/README.md b/java/src/main/java/nl/mauritssilvis/types/java/string/README.md
index 5c09c91..3b9a52f 100644
--- a/java/src/main/java/nl/mauritssilvis/types/java/string/README.md
+++ b/java/src/main/java/nl/mauritssilvis/types/java/string/README.md
@@ -8,7 +8,7 @@ With this part of the [Java types](../../../../../../../..) project, I provide i
 
 Below, I give an overview of the different [implementations](#1-implementations) I considered.
 
-General information about the string data type can be found in the [string section](../../../../../../../../../#31-strings) of the [Types](../../../../../../../../..) readme.
+General information about the string data type can be found in the [Strings section](../../../../../../../../../#31-strings) of the [Types](../../../../../../../../..) readme.
 
 ## 1. Implementations
 

From db4f5e8686a5e1b3f1f5fa8f90629ae3a0765278 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 20:17:30 +0200
Subject: [PATCH 21/29] Fix line endings

---
 java/gradlew.bat | 184 +++++++++++++++++++++++------------------------
 1 file changed, 92 insertions(+), 92 deletions(-)

diff --git a/java/gradlew.bat b/java/gradlew.bat
index 6689b85..93e3f59 100644
--- a/java/gradlew.bat
+++ b/java/gradlew.bat
@@ -1,92 +1,92 @@
-@rem
-@rem Copyright 2015 the original author or authors.
-@rem
-@rem Licensed under the Apache License, Version 2.0 (the "License");
-@rem you may not use this file except in compliance with the License.
-@rem You may obtain a copy of the License at
-@rem
-@rem      https://www.apache.org/licenses/LICENSE-2.0
-@rem
-@rem Unless required by applicable law or agreed to in writing, software
-@rem distributed under the License is distributed on an "AS IS" BASIS,
-@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-@rem See the License for the specific language governing permissions and
-@rem limitations under the License.
-@rem
-
-@if "%DEBUG%"=="" @echo off
-@rem ##########################################################################
-@rem
-@rem  Gradle startup script for Windows
-@rem
-@rem ##########################################################################
-
-@rem Set local scope for the variables with windows NT shell
-if "%OS%"=="Windows_NT" setlocal
-
-set DIRNAME=%~dp0
-if "%DIRNAME%"=="" set DIRNAME=.
-@rem This is normally unused
-set APP_BASE_NAME=%~n0
-set APP_HOME=%DIRNAME%
-
-@rem Resolve any "." and ".." in APP_HOME to make it shorter.
-for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
-
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
-
-@rem Find java.exe
-if defined JAVA_HOME goto findJavaFromJavaHome
-
-set JAVA_EXE=java.exe
-%JAVA_EXE% -version >NUL 2>&1
-if %ERRORLEVEL% equ 0 goto execute
-
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:findJavaFromJavaHome
-set JAVA_HOME=%JAVA_HOME:"=%
-set JAVA_EXE=%JAVA_HOME%/bin/java.exe
-
-if exist "%JAVA_EXE%" goto execute
-
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:execute
-@rem Setup the command line
-
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
-
-
-@rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
-
-:end
-@rem End local scope for the variables with windows NT shell
-if %ERRORLEVEL% equ 0 goto mainEnd
-
-:fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-set EXIT_CODE=%ERRORLEVEL%
-if %EXIT_CODE% equ 0 set EXIT_CODE=1
-if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
-exit /b %EXIT_CODE%
-
-:mainEnd
-if "%OS%"=="Windows_NT" endlocal
-
-:omega
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

From 13c14e22e9a85d3c35a7736655ddb2214339aedd Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Sun, 8 Oct 2023 20:49:16 +0200
Subject: [PATCH 22/29] Add to-do

---
 java/gradle/wrapper/gradle-wrapper.properties | 1 +
 1 file changed, 1 insertion(+)

diff --git a/java/gradle/wrapper/gradle-wrapper.properties b/java/gradle/wrapper/gradle-wrapper.properties
index 3fa8f86..b6d776e 100644
--- a/java/gradle/wrapper/gradle-wrapper.properties
+++ b/java/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+# TODO: Wait for a Gradle version that runs on Java 21
 distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true

From c7402ca60b4a3c892ea05707d69ce474632dc53d Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Mon, 9 Oct 2023 17:06:21 +0200
Subject: [PATCH 23/29] Number main sections

---
 java/README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/java/README.md b/java/README.md
index f029877..c909be0 100644
--- a/java/README.md
+++ b/java/README.md
@@ -8,7 +8,7 @@ With this part of the [Types](..) project, I provide implementations of commonly
 
 Below, I give an [overview](#overview) of the available implementations.
 
-## Overview
+## 1. Overview
 
 Currently, (partial) Java implementations of the following data types and structures are available:
 

From 1cbf41681cc049d09a266d509d91246ad89b0b04 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Mon, 9 Oct 2023 17:22:46 +0200
Subject: [PATCH 24/29] Document changes

---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d14ee6c..d8faac4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [semantic versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Improve the project documentation.
 - Update the Java version from 20 to 21.
 - Update the Gradle version from 8.3 to 8.4.
 - Update the refreshVersions version from 0.60.2 to 0.60.3.

From ddaff1cea44514df5e9b3219d0f433065d22baf3 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Tue, 10 Oct 2023 11:05:11 +0200
Subject: [PATCH 25/29] Fix links with anchors

---
 README.md      |  8 ++++----
 java/README.md | 10 +++++-----
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/README.md b/README.md
index a680397..2ad5045 100644
--- a/README.md
+++ b/README.md
@@ -36,10 +36,10 @@ Currently, implementations of commonly used data types and structures are availa
 
 I specifically provide the following (partial) data type and structure implementations:
 
-| Data type or structure | Java                                                                            |
-|------------------------|---------------------------------------------------------------------------------|
-| String                 | [✅](java/src/main/java/nl/mauritssilvis/types/java/string)                      |
-| • Immutable string     | [✅](java/src/main/java/nl/mauritssilvis/types/java/string#11-immutable-strings) |
+| Data type or structure | Java                                                                             |
+|------------------------|----------------------------------------------------------------------------------|
+| String                 | [✅](java/src/main/java/nl/mauritssilvis/types/java/string)                       |
+| • Immutable string     | [✅](java/src/main/java/nl/mauritssilvis/types/java/string/#11-immutable-strings) |
 
 ## 3. Background
 
diff --git a/java/README.md b/java/README.md
index c909be0..ed9265b 100644
--- a/java/README.md
+++ b/java/README.md
@@ -6,16 +6,16 @@
 
 With this part of the [Types](..) project, I provide implementations of commonly used data types and structures in Java.
 
-Below, I give an [overview](#overview) of the available implementations.
+Below, I give an [overview](#1-overview) of the available implementations.
 
 ## 1. Overview
 
 Currently, (partial) Java implementations of the following data types and structures are available:
 
-| Data type or structure                                                                      |
-|---------------------------------------------------------------------------------------------|
-| [String](src/main/java/nl/mauritssilvis/types/java/string)                                  |
-| • [Immutable string](src/main/java/nl/mauritssilvis/types/java/string#11-immutable-strings) |
+| Data type or structure                                                                       |
+|----------------------------------------------------------------------------------------------|
+| [String](src/main/java/nl/mauritssilvis/types/java/string)                                   |
+| • [Immutable string](src/main/java/nl/mauritssilvis/types/java/string/#11-immutable-strings) |
 
 ## License
 

From 01f4806d89860271aeeb3d8ba8e89504079ab286 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Wed, 11 Oct 2023 13:18:40 +0200
Subject: [PATCH 26/29] Improve the string data type documentation

---
 .../main/java/nl/mauritssilvis/types/java/string/README.md    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/java/src/main/java/nl/mauritssilvis/types/java/string/README.md b/java/src/main/java/nl/mauritssilvis/types/java/string/README.md
index 3b9a52f..34438da 100644
--- a/java/src/main/java/nl/mauritssilvis/types/java/string/README.md
+++ b/java/src/main/java/nl/mauritssilvis/types/java/string/README.md
@@ -29,8 +29,9 @@ public interface ImmutableString {
     char[] toCharArray();
 }
 ```
+
 Objects of the above type know their length, allow random access to their characters and can be converted to character arrays.
-None of the supplied methods can change an object's contents.
+None of the methods should change (or allow for changes in) an object's contents.
 
 #### 1.1.1 An array of characters
 
@@ -43,6 +44,7 @@ package nl.mauritssilvis.types.java.string;
 // Import statements
 
 public class ArrayString implements ImmutableString {
+    // The underlying data structure: an array of characters
     private final char[] chars;
 
     // A no-argument constructor and constructors accepting

From 5f1ce2ab993a178703b33a7b0ab0d55be1828051 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Wed, 11 Oct 2023 16:28:38 +0200
Subject: [PATCH 27/29] Select the Temurin JDK 21

---
 java/.idea/misc.xml   | 3 +--
 java/build.gradle.kts | 3 +--
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/java/.idea/misc.xml b/java/.idea/misc.xml
index c4e4f59..976db11 100644
--- a/java/.idea/misc.xml
+++ b/java/.idea/misc.xml
@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <!-- TODO: Set project-jdk-name to temurin-21 -->
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="temurin-21" project-jdk-type="JavaSDK" />
 </project>
\ No newline at end of file
diff --git a/java/build.gradle.kts b/java/build.gradle.kts
index 8d9dfd8..87d2721 100644
--- a/java/build.gradle.kts
+++ b/java/build.gradle.kts
@@ -24,8 +24,7 @@ dependencies {
 java {
     toolchain {
         languageVersion.set(JavaLanguageVersion.of(libs.versions.java.jdk.get()))
-        // TODO: Reset to JvmVendorSpec.ADOPTIUM
-        vendor.set(JvmVendorSpec.ORACLE)
+        vendor.set(JvmVendorSpec.ADOPTIUM)
     }
 }
 

From 5fc07f4e907ac9bc41043a79908cbc5aee317a84 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Wed, 11 Oct 2023 17:07:03 +0200
Subject: [PATCH 28/29] Adapt to-do note

---
 java/gradle/wrapper/gradle-wrapper.properties | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/java/gradle/wrapper/gradle-wrapper.properties b/java/gradle/wrapper/gradle-wrapper.properties
index b6d776e..1bbf455 100644
--- a/java/gradle/wrapper/gradle-wrapper.properties
+++ b/java/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-# TODO: Wait for a Gradle version that runs on Java 21
+# TODO: Select a Gradle version that officially supports running on Java 21
 distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true

From 49a2322850b2977d6e9366d9fcd0ce243455d1b4 Mon Sep 17 00:00:00 2001
From: Maurits Silvis <mauritssilvis@gmail.com>
Date: Wed, 11 Oct 2023 17:11:50 +0200
Subject: [PATCH 29/29] Set the release version

---
 CHANGELOG.md                   | 2 +-
 java/gradle/libs.versions.toml | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d8faac4..f977135 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,7 @@ All notable changes to the [Types](https://github.com/mauritssilvis/types) proje
 The file format is based on [keep a changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [semantic versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [0.2.0] - 2023-10-11
 
 ### Changed
 
diff --git a/java/gradle/libs.versions.toml b/java/gradle/libs.versions.toml
index 50538fc..b3baa5e 100644
--- a/java/gradle/libs.versions.toml
+++ b/java/gradle/libs.versions.toml
@@ -4,7 +4,7 @@
 
 java-jdk = "21"
 
-java-types = "0.2.0-SNAPSHOT"
+java-types = "0.2.0"
 
 junit-jupiter = "5.10.0"