chore: Use java 21 as default (#150)

Author: adangel

.github/workflows/build.yml

@@ -29,7 +29,7 @@ jobs:
           distribution: 'temurin'
           java-version: |
             11
-            17
+            21
       - name: Prepare HOME/openjdk11
         run: ln -sfn "${JAVA_HOME_11_X64}" "${HOME}/openjdk11"
       - uses: actions/cache@0400d5f644dc74513175e3cd8d07132dd4860809 #v4.2.4

.github/workflows/manual-integration-tests.yml

@@ -24,7 +24,7 @@ jobs:
           distribution: 'temurin'
           java-version: |
             11
-            17
+            21
       - name: Prepare HOME/openjdk11
         run: ln -sfn "${JAVA_HOME_11_X64}" "${HOME}/openjdk11"
       - uses: actions/cache@0400d5f644dc74513175e3cd8d07132dd4860809 #v4.2.4

History.md

@@ -4,6 +4,7 @@
 ## Fixed Issues
 ## Merged pull requests
 * [#147](https://github.com/pmd/pmd-regression-tester/pull/147): chore: Fix manual integration tests - [Andreas Dangel](https://github.com/adangel) (@adangel)
+* [#150](https://github.com/pmd/pmd-regression-tester/pull/150): chore: Use java 21 as default - [Andreas Dangel](https://github.com/adangel) (@adangel)
 ## Dependency Updates
 
 # 1.6.2 / 2025-10-24