[Ubuntu] OpenJDK(java)설치하기 (apt-get)

$ sudo apt-get update 
$ sudo apt-get install openjdk-8-jdk

$ sudo apt-get install openjdk-11-jdk
$ java -version

 

# jdk삭제

$ sudo apt-get purge openjdk*

 

$ which java
/usr/bin/java

$ readlink -f /usr/bin/java
/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.312.b07-1.el7_9.x86_64/jre/bin/java

$ vi /etc/profile
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.312.b07-1.el7_9.x86_64/jre
export PATH=$PATH:JAVA_HOME/bin

 

$ export JAVA_HOME 
$ export PATH 
$ . /etc/profile