ICU-23056 BRS78rc Add ICU4J API signature file

Author: mihnita

docs/processes/release/tasks/docs.md

@@ -190,7 +190,7 @@ API change report.
 
 1.  Run `releases_tools/api_reports.sh` at `<icu4j_root>`
 2.  Resolve any warnings before proceeding.
-3.  The output file `icu4j<ver>.api3.gz` is created in `<icu4j_root>/out` directory.
+3.  The output file `icu4j<ver>.api3.gz` is created in `<icu4j_root>/target` directory.
 4.  Copy the output .gz file to `<icu4j_root>/tools/build` directory and check in the
     file to the repository.
 5.  You may delete very old versions of the API signature files. We keep last 5

icu4j/APIChangeReport.html

@@ -113,6 +113,10 @@ <h3>Package com.ibm.icu.message2</h3>
 
 <h3>Package com.ibm.icu.text</h3>
 <ul>
+BreakIterator
+<ul>
+<li><span style='color:green'>(stable)</span> public java.lang.Object <i>clone</i>()</li>
+</ul>
 Collator
 <ul>
 <li><span style='color:green'>(stable)</span> public java.lang.Object <i>clone</i>()</li>
@@ -217,10 +221,6 @@ <h2>Changed in ICU4J 78 (old, new)</h2>
 
 <h3>Package com.ibm.icu.text</h3>
 <ul>
-BreakIterator
-<ul>
-<li>    <span style='color:green'>(stable)</span> public java.lang.Object <i>clone</i>()</br>
-<span style='color:green'>(stable)</span> public com.ibm.icu.text.BreakIterator <i>clone</i>()</li>
 <li>    <span style='color:green'>(stable)</span> public class <i>DateIntervalFormat</i> extends com.ibm.icu.text.UFormat</br>
 <span style='color:green'>(stable)</span> public class <i>DateIntervalFormat</i> extends com.ibm.icu.text.UFormat implements java.lang.Cloneable</li>
 <li>    <span style='color:green'>(stable)</span> public class <i>DecimalFormat</i> extends com.ibm.icu.text.NumberFormat</br>
@@ -229,7 +229,6 @@ <h3>Package com.ibm.icu.text</h3>
 <span style='color:green'>(stable)</span> public class <i>MessageFormat</i> extends com.ibm.icu.text.UFormat implements java.lang.Cloneable</li>
 <li>    <span style='color:green'>(stable)</span> public abstract class <i>NumberFormat</i> extends com.ibm.icu.text.UFormat</br>
 <span style='color:green'>(stable)</span> public abstract class <i>NumberFormat</i> extends com.ibm.icu.text.UFormat implements java.lang.Cloneable</li>
-</ul>
 NumberFormat
 <ul>
 <li>    <span style='color:green'>(stable)</span> public java.lang.Object <i>clone</i>()</br>
@@ -485,7 +484,10 @@ <h3>Package com.ibm.icu.segmenter</h3>
 
 <h3>Package com.ibm.icu.text</h3>
 <ul>
-<li><span style='color:orange'>(draft)</span> public class <i>BreakTransliteratorAccess</i></li>
+BreakIterator
+<ul>
+<li><span style='color:green'>(stable)</span> public BreakIterator <i>clone</i>()</li>
+</ul>
 Collator
 <ul>
 <li><span style='color:green'>(stable)</span> public Collator <i>clone</i>()</li>
@@ -630,6 +632,6 @@ <h3>Package com.ibm.icu.util</h3>
 </ul>
 
 <hr/>
-<p><i><font size="-1">Contents generated by ReportAPI tool on Fri Sep 19 23:29:08 UTC 2025<br/>© 2025 and later: Unicode, Inc. and others. License & terms of use: <a href="http://www.unicode.org/copyright.html">http://www.unicode.org/copyright.html</a></font></i></p>
+<p><i><font size="-1">Contents generated by ReportAPI tool on Fri Sep 26 13:26:50 PDT 2025<br/>© 2025 and later: Unicode, Inc. and others. License & terms of use: <a href="http://www.unicode.org/copyright.html">http://www.unicode.org/copyright.html</a></font></i></p>
 </body>
 </html>

icu4j/main/core/src/main/java/com/ibm/icu/text/DateFormatSymbols.java

@@ -1926,6 +1926,7 @@ private DateFormatSymbols(ULocale desiredLocale, ICUResourceBundle b, String cal
      * @internal
      * @deprecated This API is ICU internal only.
      */
+    @Deprecated
     protected String[] initEras(String erasKey, Map<String, Map<String, String>> maps,
             ICUResourceBundle calBundle, int maxEra) {
         Map<String, String> eraNamesTable = maps.get(erasKey);

icu4j/perf-tests/src/main/java/com/ibm/icu/text/BreakTransliteratorAccess.java

@@ -2,8 +2,38 @@
 // License & terms of use: http://www.unicode.org/copyright.html
 package com.ibm.icu.text;
 
+/**
+ * This provides access for testing to the non-public {@code BreakTransliterator}.
+ *
+ * @internal
+ * @deprecated This API is ICU internal only.
+ */
+@Deprecated
 public class BreakTransliteratorAccess {
-    // Non-public access
+
+    /**
+     * The private constructor.
+     *
+     * <p>
+     * The internal} and deprecated tags prevent the otherwise public default constuctor
+     * from being collected for the various API reports and checks.
+     *
+     * @internal
+     * @deprecated This API is ICU internal only.
+     */
+    @Deprecated
+    private BreakTransliteratorAccess() {
+        // Prevent creation, and prevent the otherwise public default constuctor
+        // from being collected for the various API reports and checks.
+    }
+
+    /**
+     * The accessor method. Public only for testing.
+     *
+     * @internal
+     * @deprecated This API is ICU internal only.
+     */
+    @Deprecated
     public static Transliterator newInstance() {
         return new BreakTransliterator("Any-Break", UnicodeSet.ALL_CODE_POINTS);
     }