docs/java8.md

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# Java
Install Java programming language to user .local directory using [AdoptOpenJDK](https://adoptopenjdk.net/) distribution.
Optionally, also set up [Maven](https://downloads.apache.org/maven/maven-3/) and [Gradle](https://services.gradle.org/distributions/) for building artifacts.
## Remove old version before installation
```bash
rm -rf $HOME/.local/openjdk-8 $HOME/.local/maven-3 $HOME/.local/gradle
```
## Install latest binary release from repositories
```bash
wget -qO jdk8.tar.gz "https://api.adoptium.net/v3/binary/latest/8/ga/linux/x64/jdk/hotspot/normal/eclipse?project=jdk" \
&& tar -C $HOME/.local -xzf jdk8.tar.gz \
&& mv $HOME/.local/jdk8u* $HOME/.local/jdk8 \
&& rm jdk8.tar.gz
MVN_VERSION=
wget -qO maven-3.tar.gz "https://downloads.apache.org/maven/maven-3/${MVN_VERSION}/binaries/apache-maven-${MVN_VERSION}-bin.tar.gz" \
&& tar -C $HOME/.local -xzf maven-3.tar.gz \
&& mv $HOME/.local/apache-maven* $HOME/.local/maven-3 \
&& rm maven-3.tar.gz
GRDL_VERSION=
wget -qO gradle.zip "https://services.gradle.org/distributions/gradle-${GRDL_VERSION}-bin.zip" \
&& unzip -qq -d $HOME/.local gradle.zip \
&& mv $HOME/.local/gradle-${GRDL_VERSION} $HOME/.local/gradle \
&& rm gradle.zip
```
## Set up environment variables
```bash
cat << EOF >> $HOME/.bashrc
# java 8, maven, gradle
export JAVA_HOME=\$HOME/.local/jdk8
export PATH=\$PATH:\$JAVA_HOME/bin:\$HOME/.local/maven-3/bin:\$HOME/.local/gradle/bin
EOF
```
## Test
```bash
java -version
mvn -v
gradle -v
```