Added details to /viewer/java/installation/ documentaiton article

java/getting-started/installation.md

@@ -4,22 +4,34 @@ url: viewer/java/installation
 title: Install GroupDocs.Viewer for Java
 linkTitle: Installation
 weight: 4
-keywords: installation, maven
+keywords: installation, maven, java
 description: "This topic describes how to install GroupDocs.Viewer for Java."
 productName: GroupDocs.Viewer for Java
 hideChildren: False
 toc: True
 ---
 
+{{< alert style="info" >}}
+
+Starting from [GroupDocs.Viewer for Java 24.4](https://releases.groupdocs.com/viewer/java/release-notes/2024/groupdocs-viewer-for-java-24-4-release-notes/), the JAR package is signed using a GPG signature. You can find the public key in the [GPG-KEYS.txt](https://releases.groupdocs.com/java/repo/com/groupdocs/GPG-KEYS.txt) file. Learn more about verifying signatures in the [Making and verifying signatures](https://www.gnupg.org/gph/en/manual/x135.html) article.
+
+{{< /alert >}}
+
 ## Install using Maven
 
-All Java packages are hosted at [GroupDocs Artifact Repository](https://repository.groupdocs.com/). You can easily reference GroupDocs.Viewer for Java API directly in your Maven project using following steps.
+All GroupDocs packages are hosted at [GroupDocs Artifact Repository](https://releases.groupdocs.com/java/repo/com/groupdocs/groupdocs-viewer/). You can download packages or reference GroupDocs.Viewer for Java API directly in your Maven project using following steps. 
+
+{{< alert style="tip" >}}
+
+[Download](/viewer/java/sample-apps/getting-started/installation/maven-app.zip) a sample Maven application that demonstrates using GroupDocs.Viewer for Java. You can run the application locally with `mvn exec:java` command.
+
+{{< /alert >}}
 
 ### Add GroupDocs Artifact Repository
 
-Specify repository configuration and location in the Maven `pom.xml`:
+Add GroupDocs Artifact Repository to your `pom.xml` file:
 
-{{< tabs "example1">}}
+{{< tabs "pom-repository">}}
 {{< tab "pom.xml" >}}
 ```xml
 <repositories>
@@ -37,16 +49,103 @@ Specify repository configuration and location in the Maven `pom.xml`:
 
 Define GroupDocs.Viewer for Java API dependency in your `pom.xml`:
 
-{{< tabs "example2">}}
+{{< tabs "pom-dependency">}}
 {{< tab "pom.xml" >}}
 ```xml
 <dependencies>
     <dependency>
         <groupId>com.groupdocs</groupId>
         <artifactId>groupdocs-viewer</artifactId>
-        <version>21.11.1</version> 
+        <version>24.4</version> 
     </dependency>
 </dependencies>
 ```
 {{< /tab >}}
 {{< /tabs >}}
+
+## Reference in Java application
+
+To get started, download the latest version of GroupDocs.Viewer for Java (JAR file) from [GroupDocs Artifact Repository](https://releases.groupdocs.com/java/repo/com/groupdocs/groupdocs-viewer/). Also, make sure you have [Java](https://www.oracle.com/java/technologies/downloads/) installed.
+
+### Create application
+
+{{< alert style="tip" >}}
+
+You can [download](/viewer/java/sample-apps/getting-started/installation/java-app.zip) the sample application and proceed to building it.
+
+{{< /alert >}}
+
+{{< tabs "java-app">}}
+{{< tab "App.java" >}}
+```java
+import com.groupdocs.viewer.Viewer;
+import com.groupdocs.viewer.options.*;
+
+public class App {
+    public static void main(String[] args) throws Exception {
+        Viewer viewer = new Viewer("formatting.docx");
+        viewer.view(HtmlViewOptions.forEmbeddedResources());
+        viewer.close();
+    }
+}
+```
+{{< /tab >}}
+{{< tab "formatting.docx" >}}
+{{< tab-text >}}
+`formatting.docx` is sample DOCX file that we're going to use in this example. Click [here](/viewer/java/sample-files/getting-started/installation/formatting.docx) to download it.
+{{< /tab-text >}}
+{{< /tab >}}
+{{< tab "groupdocs-viewer.jar" >}}
+{{< tab-text >}}
+`groupdocs-viewer.jar` is GroupDocs.Viewer for Java JAR file e.g., [groupdocs-viewer-24.4.jar](https://releases.groupdocs.com/java/repo/com/groupdocs/groupdocs-viewer/24.4/groupdocs-viewer-24.4.jar).
+{{< /tab-text >}}
+{{< /tab >}}
+{{< /tabs >}}
+
+Your folder tree should look similar to the following directory structure:
+
+```Directory
+📂 java-app
+ ├──App.java
+ ├──formatting.docx
+ └──groupdocs-viewer.jar
+```
+
+### Build application
+
+To build Java application run the command below. This comand compiles the application and creates `App.class` file in the current directory.
+
+{{< tabs "java-app-build">}}
+{{< tab "Windows" >}}
+```bash
+javac -d . -cp ".;./groupdocs-viewer.jar" App.java
+```
+{{< /tab >}}
+{{< tab "Linux" >}}
+```bash
+javac -d . -cp ".:./groupdocs-viewer.jar" App.java
+```
+{{< /tab >}}
+{{< /tabs >}}
+
+### Run application
+
+To run the application type the command below. As a result two HTML documents will be created in the current directory for the first two pages of the document.
+
+{{< tabs "java-app-run">}}
+{{< tab "Windows" >}}
+```bash
+java -cp ".;./groupdocs-viewer.jar" App
+```
+{{< /tab >}}
+{{< tab "Linux" >}}
+```bash
+java -Djava.awt.headless=true -cp ".:./groupdocs-viewer.jar" App
+```
+
+{{< tab-text >}}
+Please note that `-Djava.awt.headless=true` required when your Java installation does not inlude GUI libraries.
+{{< /tab-text >}}
+
+{{< /tab >}}
+{{< /tabs >}}