1、加入repository: sudo add-apt-repository “deb http://cz.archive.Ubuntu.com/ubuntu hardy-updates main multiverse” (vi /etc/apt/sources.list) 2、更新源: sudo apt-get update 3、安装 jdk 和 jre: sudo apt-get install sun-java6-jdk sun-java6-jre 4、切换为 Sun JDK: sudo update-java-alternatives -s java-6-sun (ls /usr/lib/jvm) 5、查看是否