Java 설치

ubuntu@ip-172-26-8-54:~$ sudo apt-get install openjdk-11-jdk

done.
done.
ubuntu@ip-172-26-8-54:~$ java --version
openjdk 11.0.15 2022-04-19
OpenJDK Runtime Environment (build 11.0.15+10-Ubuntu-0ubuntu0.20.04.1)
OpenJDK 64-Bit Server VM (build 11.0.15+10-Ubuntu-0ubuntu0.20.04.1, mixed mode, sharing)

JAVA_HOME

ubuntu@ip-172-26-8-54:~$ sudo vi ~/.bashrc

# ~/.bashrc 파일에 설정 추가
# JAVA_HOME settings
export JAVA_HOME=$(dirname $(dirname $(readlink -f $(which java))))
export PATH=$PATH:$JAVA_HOME/bin

ubuntu@ip-172-26-8-54:~$ source ~/.bashrc
ubuntu@ip-172-26-8-54:~$ echo $JAVA_HOME
/usr/lib/jvm/java-11-openjdk-amd64