OpenJDK 11 : Install2021/09/23 |
|
Install OpenJDK.
|
|
| [1] | Install OpenJDK 11. If you need only JRE, Install only [openjdk-11-jre] package. |
|
root@dlp:~#
apt -y install openjdk-11-jdk
root@dlp:~#
cat > /etc/profile.d/java.sh <<'EOF'
export JAVA_HOME=$(dirname $(dirname $(readlink $(readlink $(which java))))) export PATH=$PATH:$JAVA_HOME/bin EOF
root@dlp:~#
root@dlp:~# source /etc/profile.d/java.sh
java --version openjdk 11.0.12 2021-07-20 OpenJDK Runtime Environment (build 11.0.12+7-post-Debian-2) OpenJDK 64-Bit Server VM (build 11.0.12+7-post-Debian-2, mixed mode, sharing) # verify to create test program
root@dlp:~# cat > java_test.java <<'EOF'
class java_test {
public static void main(String[] args) {
System.out.println("Hello Java World !");
}
}
EOF
root@dlp:~# javac java_test.java root@dlp:~# java java_test Hello Java World ! |
| [2] | If you installed multiple version of Java from official repository, it's possible to switch them with [alternatives]. |
|
root@dlp:~# update-alternatives --config java
There are 2 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/lib/jvm/java-17-openjdk-amd64/bin/java 1711 auto mode
1 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 manual mode
2 /usr/lib/jvm/java-17-openjdk-amd64/bin/java 1711 manual mode
Press <enter> to keep the current choice[*], or type selection number: 1
root@dlp:~# update-alternatives --config javac
There are 2 choices for the alternative javac (providing /usr/bin/javac).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/lib/jvm/java-17-openjdk-amd64/bin/javac 1711 auto mode
1 /usr/lib/jvm/java-11-openjdk-amd64/bin/javac 1111 manual mode
2 /usr/lib/jvm/java-17-openjdk-amd64/bin/javac 1711 manual mode
Press <enter> to keep the current choice[*], or type selection number: 1
root@dlp:~# java --version openjdk 11.0.12 2021-07-20 OpenJDK Runtime Environment (build 11.0.12+7-post-Debian-2) OpenJDK 64-Bit Server VM (build 11.0.12+7-post-Debian-2, mixed mode, sharing) |
| Sponsored Link |
|
|