怎样卸载linux自带openjdk并安装sun jdk

Linux系统中自带的openjdk可能不符合我们工作的需要，本篇文章和大家分享一下卸载linux自带openjdk并安装sun jdk。

检查一下系统中的jdk版本

 [hadoop@master ~]$ java -version``openjdk version "1.8.0_222-ea"``OpenJDK Runtime Environment (build 1.8.0_222-ea-b03)``OpenJDK 64-Bit Server VM (build 25.222-b03, mixed mode)

检测jdk安装包

 [hadoop@master ~]$ rpm -qa | grep java``python-javapackages-3.4.1-11.el7.noarch``javapackages-tools-3.4.1-11.el7.noarch``tzdata-java-2019b-1.el7.noarch``java-1.8.0-openjdk-headless-1.8.0.222.b03-1.el7.x86_64``java-1.8.0-openjdk-1.8.0.222.b03-1.el7.x86_64``[hadoop@master ~]$

卸载openjdk

 [hadoop@master ~]$ sudo yum -y remove *openjdk*``[sudo] password for hadoop:``Loaded plugins: langpacks, ulninfo``Resolving Dependencies``--> Running transaction check``---> Package java-1.8.0-openjdk.x86_64 1:1.8.0.222.b03-1.el7 will be erased``--> Processing Dependency: java >= 1.5 for package: jline-1.0-8.el7.noarch``--> Processing Dependency: java-1.8.0-openjdk for package: icedtea-web-1.7.1-1.el7.x86_64``---> Package java-1.8.0-openjdk-headless.x86_64 1:1.8.0.222.b03-1.el7 will be erased``--> Running transaction check``---> Package icedtea-web.x86_64 0:1.7.1-1.el7 will be erased``---> Package jline.noarch 0:1.0-8.el7 will be erased``--> Processing Dependency: jline for package: rhino-1.7R5-1.el7.noarch``--> Running transaction check``---> Package rhino.noarch 0:1.7R5-1.el7 will be erased``--> Finished Dependency Resolution``ol7_UEKR5/x86_64                     | 2.5 kB 00:00:00 ``ol7_latest/x86_64                     | 2.7 kB 00:00:00 `` ` `Dependencies Resolved`` ` `==========================================================================================================================================================================================================`` ``Package       Arch     Version      Repository     Size``==========================================================================================================================================================================================================``Removing:`` ``java-1.8.0-openjdk      x86_64    1:1.8.0.222.b03-1.el7    @anaconda/7.7    642 k`` ``java-1.8.0-openjdk-headless    x86_64    1:1.8.0.222.b03-1.el7    @anaconda/7.7    106 M``Removing for dependencies:`` ``icedtea-web      x86_64    1.7.1-1.el7      @anaconda/7.7    2.3 M`` ``jline       noarch    1.0-8.el7      @anaconda/7.7     72 k`` ``rhino       noarch    1.7R5-1.el7      @anaconda/7.7    1.1 M`` ` `Transaction Summary``==========================================================================================================================================================================================================``Remove 2 Packages (+3 Dependent packages)`` ` `Installed size: 110 M``Downloading packages:``Running transaction check``Running transaction test``Transaction test succeeded``Running transaction`` ``Erasing : icedtea-web-1.7.1-1.el7.x86_64                    1/5`` ``Erasing : rhino-1.7R5-1.el7.noarch                    2/5`` ``Erasing : jline-1.0-8.el7.noarch                     3/5`` ``Erasing : 1:java-1.8.0-openjdk-1.8.0.222.b03-1.el7.x86_64                 4/5`` ``Erasing : 1:java-1.8.0-openjdk-headless-1.8.0.222.b03-1.el7.x86_64                5/5`` ``Verifying : 1:java-1.8.0-openjdk-headless-1.8.0.222.b03-1.el7.x86_64                1/5`` ``Verifying : 1:java-1.8.0-openjdk-1.8.0.222.b03-1.el7.x86_64                 2/5`` ``Verifying : icedtea-web-1.7.1-1.el7.x86_64                    3/5`` ``Verifying : rhino-1.7R5-1.el7.noarch                    4/5`` ``Verifying : jline-1.0-8.el7.noarch                     5/5`` ` `Removed:`` ``java-1.8.0-openjdk.x86_64 1:1.8.0.222.b03-1.el7       java-1.8.0-openjdk-headless.x86_64 1:1.8.0.222.b03-1.el7      `` ` `Dependency Removed:`` ``icedtea-web.x86_64 0:1.7.1-1.el7     jline.noarch 0:1.0-8.el7     rhino.noarch 0:1.7R5-1.el7     `` ` `Complete!

上传安装介质并解压

 [hadoop@master ~]$ ``sudo` `tar` `-xzf jdk-8u191-linux-x64.``tar``.gz -C ``/usr/lib/jvm

设置环境变量,在/etc/profile最前面加上

 export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_191``export JRE_HOME=${JAVA_HOME}/jre``export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib``export PATH=${JAVA_HOME}/bin:$PATH

最后生效一下source /etc/profile

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