# Switching to V2 ## Java distribution The major breaking change in V2 is the new mandatory `distribution` input. This field should be specified with one of supported distributions. See [Supported distributions](../README.md#Supported-distributions) for a list of available options. Use the `zulu` keyword if you would like to continue using the same distribution as in V1. ```yaml steps: - uses: actions/checkout@v2 - uses: actions/setup-java@v2 with: distribution: 'zulu' java-version: '11' java-package: jdk # optional (jdk or jre) - defaults to jdk - run: java -cp java HelloWorldApp ``` **General recommendation** — configure CI with the same distribution that is used on your local dev machine. ## Installing custom Java distribution from local file Since the `distribution` input is required in V2, you should specify it using `jdkFile` to continue installing Java from a local file on the runner ```yaml steps: - run: | download_url="https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.10%2B9/OpenJDK11U-jdk_x64_linux_hotspot_11.0.10_9.tar.gz" wget -O $RUNNER_TEMP/java_package.tar.gz $download_url - uses: actions/setup-java@v2 with: distribution: 'jdkfile' jdkFile: ${{ runner.temp }}/java_package.tar.gz java-version: '11.0.0' architecture: x64 ``` ## Dropping legacy Java version syntax 1.x V1 supported legacy Java syntax such as `1.8` (same as `8`) and `1.8.0.212` (same as `8.0.212`). V2 dropped support for legacy syntax so workflows should be updated accordingly.