[CentOS] CentOS에 open jdk 11 설치

1. 설치가능한 jdk 확인

// 설치가능한 jdk 확인
# yum list java*jdk-devel

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Available Packages
java-1.6.0-openjdk-devel.x86_64                       
java-1.7.0-openjdk-devel.x86_64                              
java-1.8.0-openjdk-devel.i686                                  
java-1.8.0-openjdk-devel.x86_64                     
java-11-openjdk-devel.i686 
java-11-openjdk-devel.x86_64

2. open jdk 11 설치

# yum install java-11-openjdk-devel.x86_64

• 설치확인

# java --version

openjdk version "11.0.11" 2021-04-20 LTS
OpenJDK Runtime Environment 18.9 (build 11.0.11+9-LTS)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.11+9-LTS, mixed mode, sharing)

3. 환경변수 설정

• 경로확인

// javac 설치경로 확인
# which javac
/bin/javac

// /bin/javac에 연결된 원본파일 위치 확인
# readlink -f /bin/javac
/usr/lib/jvm/java-11-openjdk-11.0.11.0.9-1.el7_9.x86_64/bin/javac

JAVA_HOME이 될 경로
/usr/lib/jvm/java-11-openjdk-11.0.11.0.9-1.el7_9.x86_64

• 환경변수 설정

vi /etc/profile

// 하단에 내용 추가
...

export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-11.0.11.0.9-1.el7_9.x86_64 

설정 후 명령어 입력
source /etc/profile

• 결과확인

# echo $JAVA_HOME
/usr/lib/jvm/java-11-openjdk-11.0.11.0.9-1.el7_9.x86_64