Java 11 설치하기

$ sudo amazon-linux-extras install java-openjdk11 -y

개요

운영 환경은 다음과 같다.

• OS: CentOS 8 (Virtualbox) / Amazon Linux2

자바 11 설치 (CentOS 8)

CentOS 8의 Yum 레포지토리에는 이미 자바 11에 대한 패키지가 존재한다.

$ sudo yum search openjdk
Failed to set locale, defaulting to C.UTF-8
CentOS Linux 8 - AppStream                                                                                                                                                        1.8 MB/s | 9.3 MB     00:05
CentOS Linux 8 - BaseOS                                                                                                                                                           2.6 MB/s | 7.5 MB     00:02
CentOS Linux 8 - Extras                                                                                                                                                            13 kB/s |  10 kB     00:00
======================================================================================== Name & Summary Matched: openjdk =========================================================================================
java-1.8.0-openjdk.x86_64 : OpenJDK 8 Runtime Environment
java-1.8.0-openjdk-accessibility.x86_64 : OpenJDK 8 accessibility connector
java-1.8.0-openjdk-demo.x86_64 : OpenJDK 8 Demos
java-1.8.0-openjdk-devel.x86_64 : OpenJDK 8 Development Environment
java-1.8.0-openjdk-headless.x86_64 : OpenJDK 8 Headless Runtime Environment
java-1.8.0-openjdk-headless-slowdebug.x86_64 : OpenJDK 8 Runtime Environment unoptimised with full debugging on
java-1.8.0-openjdk-javadoc.noarch : OpenJDK 8 API documentation
java-1.8.0-openjdk-javadoc-zip.noarch : OpenJDK 8 API documentation compressed in a single archive
java-1.8.0-openjdk-slowdebug.x86_64 : OpenJDK 8 Runtime Environment unoptimised with full debugging on
java-1.8.0-openjdk-src.x86_64 : OpenJDK 8 Source Bundle
java-11-openjdk.x86_64 : OpenJDK 11 Runtime Environment
java-11-openjdk-demo.x86_64 : OpenJDK 11 Demos
java-11-openjdk-devel.x86_64 : OpenJDK 11 Development Environment
java-11-openjdk-headless.x86_64 : OpenJDK 11 Headless Runtime Environment
java-11-openjdk-javadoc.x86_64 : OpenJDK 11 API documentation
java-11-openjdk-javadoc-zip.x86_64 : OpenJDK 11 API documentation compressed in a single archive
java-11-openjdk-jmods.x86_64 : JMods for OpenJDK 11
java-11-openjdk-src.x86_64 : OpenJDK 11 Source Bundle
java-11-openjdk-static-libs.x86_64 : OpenJDK 11 libraries for static linking
============================================================================================ Summary Matched: openjdk ============================================================================================
icedtea-web.x86_64 : Additional Java components for OpenJDK - Java browser plug-in and Web Start implementation

 

따라서 다음 명령어로 간단하게 설치가 가능하다.

$ sudo yum install java-11-openjdk-devel.x86_64 -y

 

설치가 완료되면 java --version으로 설치를 확인할 수 있다.

$ java --version
openjdk 11.0.12 2021-07-20 LTS
OpenJDK Runtime Environment 18.9 (build 11.0.12+7-LTS)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.12+7-LTS, mixed mode, sharing)

자바 11 설치 (Amazon Linux2)

AWS EC2의 기본 OS인 Amzon Linux2에서는 다음 명령어로 설치할 수 있다.

$ sudo amazon-linux-extras install java-openjdk11 -y

 

이제 자바 버전을 확인해보자.

$ java -version
openjdk version "1.8.0_302"
OpenJDK Runtime Environment (build 1.8.0_302-b08)
OpenJDK 64-Bit Server VM (build 25.302-b08, mixed mode)

 

 

자바 11은 설치되었으나 아직 환경변수 세팅이 덜 되어서 자바 8을 출력하고 있다. 이를 설정해준다.

$ sudo alternatives --config java

2 개의 프로그램이 'java'를 제공합니다.

  선택    명령
-----------------------------------------------
*+ 1           java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.302.b08-0.amzn2.0.1.x86_64/jre/bin/java)
   2           java-11-openjdk.x86_64 (/usr/lib/jvm/java-11-openjdk-11.0.12.0.7-0.amzn2.0.2.x86_64/bin/java)

현재 선택[+]을 유지하려면 엔터키를 누르고, 아니면 선택 번호를 입력하십시오:2 # 11버전 선택

 

 

다시 자바 버전을 확인해보자.

$ java -version
openjdk version "11.0.12" 2021-07-20 LTS
OpenJDK Runtime Environment 18.9 (build 11.0.12+7-LTS)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.12+7-LTS, mixed mode, sharing)