1、卸載debianubuntu自帶的openjdk#apt-getremoveopenjdk*卸載但不刪除配置#apt-getpurgeopenjdk*卸載并且刪除相關配置2、將jdk-7u5-linux-x64.tar.gz拷貝到/usr/lib/jvm/目錄下面，這里如果沒有jvm文件夾，則創建該文件夾,?命令:sudomkdir/usr/lib/jvm//創建文件夾jvmsudocp-r~/download/jdk-7u5-linux-x64.tar.gz/usr/lib/jvm//把下載的文件拷貝到心創?建的目錄下面sudotar-zxvfjdk-7u5-linux-x64.tar.gz//解壓縮文件3、設置環境變量，用gedit打開/etc/profile文件sudogedit/etc/profile在文件的最后面增加：exportJAVA_HOME=/usr/lib/jdk1.7.0_05exportPATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATHexportCLAsspATH=$CLAsspATH:.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib4、將系統默認的jdk修改過來$sudoupdate-alternatives--install/usr/bin/javajava/usr/lib/jvm/jdk1.7.0_05/bin/java300$sudoupdate-alternatives--install/usr/bin/javacjavac/usr/lib/jvm/jdk1.7.0_05/bin/javac300$sudoupdate-alternatives--configjava$sudoupdate-alternatives--configjavac5、檢測，輸入java-versionjavaversion"1.7.0_05"Java(TM)SERuntimeEnvironment(build1.7.0_05-b05)JavaHotSpot(TM)64-BitServerVM(build23.1-b03,mixedmode)本文來自系統大全為您提供如需轉載請注明！推薦win10下載