Add support for multiple jdks (#368)

.github/workflows/e2e-versions.yml

@@ -87,6 +87,43 @@ jobs:
         run: bash __tests__/verify-java.sh "11" "${{ steps.setup-java.outputs.path }}"
         shell: bash
 
+  setup-java-multiple-jdks:
+    name: ${{ matrix.distribution }} ${{ matrix.version }} - multiple jdks - ${{ matrix.os }}
+    needs: setup-java-major-versions
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, windows-latest, ubuntu-latest]
+        distribution: ['temurin', 'zulu', 'liberica']
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: setup-java
+        uses: ./
+        id: setup-java
+        with:
+          distribution: ${{ matrix.distribution }}
+          java-version: |
+            11
+            17
+      - name: Verify Java env variables
+        run: |
+          $versionsArr = "11","17"
+          foreach ($version in $versionsArr)
+          {
+            $envName = "JAVA_HOME_${version}_${env:RUNNER_ARCH}"
+            $JavaVersionPath = [Environment]::GetEnvironmentVariable($envName)
+            if (-not (Test-Path "$JavaVersionPath")) { 
+              Write-Host "$envName is not found"
+              exit 1
+            } 
+          }
+        shell: pwsh
+      - name: Verify Java
+        run: bash __tests__/verify-java.sh "17" "${{ steps.setup-java.outputs.path }}"
+        shell: bash
+
   setup-java-ea-versions-zulu:
     name: zulu ${{ matrix.version }} (jdk-x64) - ${{ matrix.os }}
     needs: setup-java-major-minor-versions

README.md

@@ -158,25 +158,18 @@ jobs:
 ```
 
 ### Install multiple JDKs
+
+All versions are added to the PATH. The last version will be used and available globally. Other Java versions can be accessed through env variables with such specification as 'JAVA_HOME_{{ MAJOR_VERSION }}_{{ ARCHITECTURE }}'.
+
 ```yaml
     steps:
       - uses: actions/setup-java@v3
         with:
           distribution: '<distribution>'
-          java-version: 8
-      - run: echo "JAVA_8=$JAVA_HOME" >> $GITHUB_ENV
-
-      - uses: actions/setup-java@v3
-        with:
-          distribution: '<distribution>'
-          java-version: 11
-      - run: echo "JAVA_11=$JAVA_HOME" >> $GITHUB_ENV
-
-      - uses: actions/setup-java@v3
-        with:
-          distribution: '<distribution>'
-          java-version: 15
-      - run: echo "JAVA_15=$JAVA_HOME" >> $GITHUB_ENV
+          java-version: |
+            8
+            11
+            15
 ```
 
 ### Advanced

__tests__/distributors/base-installer.test.ts

@@ -244,6 +244,10 @@ describe('setupJava', () => {
     expect(spyGetToolcachePath).toHaveBeenCalled();
     expect(spyCoreAddPath).toHaveBeenCalled();
     expect(spyCoreExportVariable).toHaveBeenCalled();
+    expect(spyCoreExportVariable).toHaveBeenCalledWith(
+      `JAVA_HOME_${input.version}_${input.architecture.toLocaleUpperCase()}`,
+      expected.path
+    );
     expect(spyCoreSetOutput).toHaveBeenCalled();
     expect(spyCoreInfo).toHaveBeenCalledWith('Trying to resolve the latest version from remote');
     expect(spyCoreInfo).toHaveBeenCalledWith(`Resolved latest version as ${expected.version}`);