OpenJDK 17 : Install2022/06/17 |
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Install OpenJDK 17.
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| [1] | If you need only JRE, Install only [java-17-openjdk] package, but if you need compiler, Install [java-17-openjdk-devel] package, too. |
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[root@dlp ~]#
dnf -y install java-17-openjdk java-17-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 17.0.3 2022-04-19 LTS OpenJDK Runtime Environment 21.9 (build 17.0.3+7-LTS) OpenJDK 64-Bit Server VM 21.9 (build 17.0.3+7-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 3 programs which provide 'java'.
Selection Command
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1 java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.332.b09-1.el9.x86_64/jre/bin/java)
*+ 2 java-11-openjdk.x86_64 (/usr/lib/jvm/java-11-openjdk-11.0.15.0.10-1.el9.x86_64/bin/java)
3 java-17-openjdk.x86_64 (/usr/lib/jvm/java-17-openjdk-17.0.3.0.7-1.el9.x86_64/bin/java)
Enter to keep the current selection[+], or type selection number: 3
[root@dlp ~]# alternatives --config javac
There are 3 programs which provide 'javac'.
Selection Command
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1 java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.332.b09-1.el9.x86_64/bin/javac)
*+ 2 java-11-openjdk.x86_64 (/usr/lib/jvm/java-11-openjdk-11.0.15.0.10-1.el9.x86_64/bin/javac)
3 java-17-openjdk.x86_64 (/usr/lib/jvm/java-17-openjdk-17.0.3.0.7-1.el9.x86_64/bin/javac)
Enter to keep the current selection[+], or type selection number: 3
[root@dlp ~]# java --version openjdk 17.0.3 2022-04-19 LTS OpenJDK Runtime Environment 21.9 (build 17.0.3+7-LTS) OpenJDK 64-Bit Server VM 21.9 (build 17.0.3+7-LTS, mixed mode, sharing)[root@dlp ~]# javac --version javac 17.0.3 |
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