Linux卸载openjdk#查看版本java-version显示如下：OpenJDKopenjdkversion"1.8.0_275"OpenJDKRuntimeEnvironment(build1.8.0_275-b01)OpenJDK64-BitServerVM(build25.275-b01,mixedmode)#Viewjdk安装软件rpm-qa|grepjava显示如下：java-1.8.0-openjdk-1.8.0.275.b01-0.el7_9.x86_64javapackages-tools-3.4.1-11.el7.noarchjava-1.8.0-openjdk-headless-1.8.0.275.b01-0.el7_9.x86_64python-javapackages-3.4.1-11.el7.noarchtzdata-java-2020d-2.el7.noarch#Uninstallopenjdk#.Noarch结束不删除rpm-e--nodepsjava-1.8.0-openjdk-1.8.0.275.b01-0.el7_9.x86_64rpm-e--nodepsjava-1.8.0-openjdk-headless-1.8.0.275.b01-0.el7_9.x86_64安装Oraclejdk官方下载地址：https://www.oracle.com/java/t...下载Linuxx86版本：jdk-8u275-linux-x64.tar.gz#Unziptar-zxvfjdk-8u275-linux-x64。tar.gz#查看目录pwd/home/software/jdk1.8.0_275#设置环境变量vim/etc/profile#添加exportJAVA_HOME=/home/software/jdk1.8.0_275exportCLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jarexportPATH=$PATH:$JAVA_HOME/bin:wq!#保存退出#启用配置源/etc/pprofile#Viewversionjava-version显示如下：javaversion"1.8.0_275"Java(TM)SERuntimeEnvironment(build1.8.0_275-b11)JavaHotSpot(TM)64-BitServerVM(build25.275-b11,混合模式）参考链接：https://www.cnblogs.com/yyjf/...
