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improve documentation and more emphasis to Java 17 (#379)

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# setup-java # Setup Java
<p align="left"> [![Main workflow](https://github.com/actions/setup-java/actions/workflows/workflow.yml/badge.svg)](https://github.com/actions/setup-java/actions/workflows/workflow.yml)
<a href="https://github.com/actions/setup-java"><img alt="GitHub Actions status" src="https://github.com/actions/setup-java/workflows/Main%20workflow/badge.svg"></a>
</p>
This action provides the following functionality for GitHub Actions runners: The `setup-java` action provides the following functionality for GitHub Actions runners:
- Downloading and setting up a requested version of Java. See [Usage](#Usage) for a list of supported distributions - Downloading and setting up a requested version of Java. See [Usage](#Usage) for a list of supported distributions
- Extracting and caching custom version of Java from a local file - Extracting and caching custom version of Java from a local file
- Configuring runner for publishing using Apache Maven - Configuring runner for publishing using Apache Maven
@ -18,14 +16,17 @@ This action provides the following functionality for GitHub Actions runners:
This action allows you to work with Java and Scala projects. This action allows you to work with Java and Scala projects.
## V2 vs V1 ## V2 vs V1
- V2 supports custom distributions and provides support for Zulu OpenJDK, Eclipse Temurin and Adopt OpenJDK out of the box. V1 supports only Zulu OpenJDK
- V2 requires you to specify distribution along with the version. V1 defaults to Zulu OpenJDK, only version input is required. Follow [the migration guide](docs/switching-to-v2.md) to switch from V1 to V2 - V2 supports custom distributions and provides support for Azul Zulu OpenJDK, Eclipse Temurin and AdoptOpenJDK out of the box. V1 supports only Azul Zulu OpenJDK
- V2 requires you to specify distribution along with the version. V1 defaults to Azul Zulu OpenJDK, only version input is required. Follow [the migration guide](docs/switching-to-v2.md) to switch from V1 to V2
## Usage ## Usage
Inputs `java-version` and `distribution` are mandatory. See [Supported distributions](#supported-distributions) section for a list of available options. Inputs `java-version` and `distribution` are mandatory. See [Supported distributions](#supported-distributions) section for a list of available options.
### Basic ### Basic Configuration
**Eclipse Temurin**
#### Eclipse Temurin
```yaml ```yaml
steps: steps:
- uses: actions/checkout@v3 - uses: actions/checkout@v3
@ -33,18 +34,18 @@ steps:
with: with:
distribution: 'temurin' # See 'Supported distributions' for available options distribution: 'temurin' # See 'Supported distributions' for available options
java-version: '17' java-version: '17'
- run: java -cp java HelloWorldApp - run: java HelloWorldApp.java
``` ```
**Zulu OpenJDK** #### Azul Zulu OpenJDK
```yaml ```yaml
steps: steps:
- uses: actions/checkout@v3 - uses: actions/checkout@v3
- uses: actions/setup-java@v3 - uses: actions/setup-java@v3
with: with:
distribution: 'zulu' # See 'Supported distributions' for available options distribution: 'zulu' # See 'Supported distributions' for available options
java-version: '11' java-version: '17'
- run: java -cp java HelloWorldApp - run: java HelloWorldApp.java
``` ```
#### Supported version syntax #### Supported version syntax
@ -58,7 +59,7 @@ Currently, the following distributions are supported:
| Keyword | Distribution | Official site | License | Keyword | Distribution | Official site | License
|-|-|-|-| |-|-|-|-|
| `temurin` | Eclipse Temurin | [Link](https://adoptium.net/) | [Link](https://adoptium.net/about.html) | `temurin` | Eclipse Temurin | [Link](https://adoptium.net/) | [Link](https://adoptium.net/about.html)
| `zulu` | Zulu OpenJDK | [Link](https://www.azul.com/downloads/zulu-community/?package=jdk) | [Link](https://www.azul.com/products/zulu-and-zulu-enterprise/zulu-terms-of-use/) | | `zulu` | Azul Zulu OpenJDK | [Link](https://www.azul.com/downloads/zulu-community/?package=jdk) | [Link](https://www.azul.com/products/zulu-and-zulu-enterprise/zulu-terms-of-use/) |
| `adopt` or `adopt-hotspot` | AdoptOpenJDK Hotspot | [Link](https://adoptopenjdk.net/) | [Link](https://adoptopenjdk.net/about.html) | | `adopt` or `adopt-hotspot` | AdoptOpenJDK Hotspot | [Link](https://adoptopenjdk.net/) | [Link](https://adoptopenjdk.net/about.html) |
| `adopt-openj9` | AdoptOpenJDK OpenJ9 | [Link](https://adoptopenjdk.net/) | [Link](https://adoptopenjdk.net/about.html) | | `adopt-openj9` | AdoptOpenJDK OpenJ9 | [Link](https://adoptopenjdk.net/) | [Link](https://adoptopenjdk.net/about.html) |
| `liberica` | Liberica JDK | [Link](https://bell-sw.com/) | [Link](https://bell-sw.com/liberica_eula/) | | `liberica` | Liberica JDK | [Link](https://bell-sw.com/) | [Link](https://bell-sw.com/liberica_eula/) |
@ -69,7 +70,7 @@ Currently, the following distributions are supported:
**NOTE:** AdoptOpenJDK got moved to Eclipse Temurin and won't be updated anymore. It is highly recommended to migrate workflows from `adopt` to `temurin` to keep receiving software and security updates. See more details in the [Good-bye AdoptOpenJDK post](https://blog.adoptopenjdk.net/2021/08/goodbye-adoptopenjdk-hello-adoptium/). **NOTE:** AdoptOpenJDK got moved to Eclipse Temurin and won't be updated anymore. It is highly recommended to migrate workflows from `adopt` to `temurin` to keep receiving software and security updates. See more details in the [Good-bye AdoptOpenJDK post](https://blog.adoptopenjdk.net/2021/08/goodbye-adoptopenjdk-hello-adoptium/).
**NOTE:** For Zulu OpenJDK architectures x64 and arm64 are mapped to x86 / arm with proper hw_bitness. **NOTE:** For Azul Zulu OpenJDK architectures x64 and arm64 are mapped to x86 / arm with proper hw_bitness.
### Caching packages dependencies ### Caching packages dependencies
The action has a built-in functionality for caching and restoring dependencies. It uses [actions/cache](https://github.com/actions/cache) under hood for caching dependencies but requires less configuration settings. Supported package managers are gradle, maven and sbt. The format of the used cache key is `setup-java-${{ platform }}-${{ packageManager }}-${{ fileHash }}`, where the hash is based on the following files: The action has a built-in functionality for caching and restoring dependencies. It uses [actions/cache](https://github.com/actions/cache) under hood for caching dependencies but requires less configuration settings. Supported package managers are gradle, maven and sbt. The format of the used cache key is `setup-java-${{ platform }}-${{ packageManager }}-${{ fileHash }}`, where the hash is based on the following files:
@ -88,7 +89,7 @@ steps:
- uses: actions/setup-java@v3 - uses: actions/setup-java@v3
with: with:
distribution: 'temurin' distribution: 'temurin'
java-version: '11' java-version: '17'
cache: 'gradle' cache: 'gradle'
- run: ./gradlew build --no-daemon - run: ./gradlew build --no-daemon
``` ```
@ -100,7 +101,7 @@ steps:
- uses: actions/setup-java@v3 - uses: actions/setup-java@v3
with: with:
distribution: 'temurin' distribution: 'temurin'
java-version: '11' java-version: '17'
cache: 'maven' cache: 'maven'
- name: Build with Maven - name: Build with Maven
run: mvn -B package --file pom.xml run: mvn -B package --file pom.xml
@ -113,13 +114,14 @@ steps:
- uses: actions/setup-java@v3 - uses: actions/setup-java@v3
with: with:
distribution: 'temurin' distribution: 'temurin'
java-version: '11' java-version: '17'
cache: 'sbt' cache: 'sbt'
- name: Build with SBT - name: Build with SBT
run: sbt package run: sbt package
``` ```
### Check latest ### Check latest
In the basic examples above, the `check-latest` flag defaults to `false`. When set to `false`, the action tries to first resolve a version of Java from the local tool cache on the runner. If unable to find a specific version in the cache, the action will download a version of Java. Use the default or set `check-latest` to `false` if you prefer a faster more consistent setup experience that prioritizes trying to use the cached versions at the expense of newer versions sometimes being available for download. In the basic examples above, the `check-latest` flag defaults to `false`. When set to `false`, the action tries to first resolve a version of Java from the local tool cache on the runner. If unable to find a specific version in the cache, the action will download a version of Java. Use the default or set `check-latest` to `false` if you prefer a faster more consistent setup experience that prioritizes trying to use the cached versions at the expense of newer versions sometimes being available for download.
If `check-latest` is set to `true`, the action first checks if the cached version is the latest one. If the locally cached version is not the most up-to-date, the latest version of Java will be downloaded. Set `check-latest` to `true` if you want the most up-to-date version of Java to always be used. Setting `check-latest` to `true` has performance implications as downloading versions of Java is slower than using cached versions. If `check-latest` is set to `true`, the action first checks if the cached version is the latest one. If the locally cached version is not the most up-to-date, the latest version of Java will be downloaded. Set `check-latest` to `true` if you want the most up-to-date version of Java to always be used. Setting `check-latest` to `true` has performance implications as downloading versions of Java is slower than using cached versions.
@ -133,9 +135,9 @@ steps:
- uses: actions/setup-java@v3 - uses: actions/setup-java@v3
with: with:
distribution: 'adopt' distribution: 'adopt'
java-version: '11' java-version: '17'
check-latest: true check-latest: true
- run: java -cp java HelloWorldApp - run: java HelloWorldApp.java
``` ```
### Testing against different Java versions ### Testing against different Java versions
@ -145,7 +147,7 @@ jobs:
runs-on: ubuntu-20.04 runs-on: ubuntu-20.04
strategy: strategy:
matrix: matrix:
java: [ '8', '11', '13', '15' ] java: [ '8', '11', '17' ]
name: Java ${{ matrix.Java }} sample name: Java ${{ matrix.Java }} sample
steps: steps:
- uses: actions/checkout@v3 - uses: actions/checkout@v3
@ -154,7 +156,7 @@ jobs:
with: with:
distribution: '<distribution>' distribution: '<distribution>'
java-version: ${{ matrix.java }} java-version: ${{ matrix.java }}
- run: java -cp java HelloWorldApp - run: java HelloWorldApp.java
``` ```
### Install multiple JDKs ### Install multiple JDKs
@ -172,7 +174,7 @@ All versions are added to the PATH. The last version will be used and available
15 15
``` ```
### Advanced ### Advanced Configuration
- [Selecting a Java distribution](docs/advanced-usage.md#Selecting-a-Java-distribution) - [Selecting a Java distribution](docs/advanced-usage.md#Selecting-a-Java-distribution)
- [Eclipse Temurin](docs/advanced-usage.md#Eclipse-Temurin) - [Eclipse Temurin](docs/advanced-usage.md#Eclipse-Temurin)
- [Adopt](docs/advanced-usage.md#Adopt) - [Adopt](docs/advanced-usage.md#Adopt)