OpenJDK 11 : Install2021/04/12 |
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Install OpenJDK 11.
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| [1] | If you need only JRE, Install only [java-11-openjdk] package, but if you need compiler, Install [java-11-openjdk-devel] package, too. |
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[root@dlp ~]#
dnf -y install java-11-openjdk java-11-openjdk-devel
[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 11.0.10 2021-01-19 LTS OpenJDK Runtime Environment 18.9 (build 11.0.10+9-LTS) OpenJDK 64-Bit Server VM 18.9 (build 11.0.10+9-LTS, 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 CentOS official repository, it's possible to switch them with [alternatives]. |
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[root@dlp ~]# alternatives --config java
There are 2 programs which provide 'java'.
Selection Command
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1 java-11-openjdk.x86_64 (/usr/lib/jvm/java-11-openjdk-11.0.10.0.9-8.el8.x86_64/bin/java)
*+ 2 java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.282.b08-4.el8.x86_64/jre/bin/java)
Enter to keep the current selection[+], or type selection number: 1
[root@dlp ~]# alternatives --config javac
There are 2 programs which provide 'javac'.
Selection Command
-----------------------------------------------
1 java-11-openjdk.x86_64 (/usr/lib/jvm/java-11-openjdk-11.0.10.0.9-8.el8.x86_64/bin/javac)
*+ 2 java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.282.b08-4.el8.x86_64/bin/javac)
Enter to keep the current selection[+], or type selection number: 1
[root@dlp ~]# java --version openjdk 11.0.10 2021-01-19 LTS OpenJDK Runtime Environment 18.9 (build 11.0.10+9-LTS) OpenJDK 64-Bit Server VM 18.9 (build 11.0.10+9-LTS, mixed mode, sharing) [root@dlp ~]# javac --version javac 11.0.10 |
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