[CONFIG] Java Tests script for github-actions. Multi-version/multi-OS tests added.

Author: Gonzalo Diaz

.github/workflows/java-gradle.yml

@@ -22,14 +22,15 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
+        java: [ '20', '22' ]
     runs-on: ${{ matrix.os }}
 
     steps:
       - uses: actions/checkout@v4
       - name: Set up JDK 20
         uses: actions/setup-java@v4
         with:
-          java-version: '20'
+          java-version: ${{ matrix.java }}
           distribution: temurin
 
       - name: Validate Gradle wrapper