Ubuntu install jdk1.6

1 下载jdk1.6，放在用户目录下，如 /home/jack

2 安装 sudo /home/jack/jdk1.6.0_12.bin

3 安装完成后 设置环境变量 sudo vi /etc/environment，增加如下：PATH＝"......:/home/jack/jdk1.6.0_12/bin" CLASSPATH=.:/home/jack/jdk1.6.0_12/lib JAVA_HOME=/home/jack/jdk1.6.0_12

4 切换至超级用户 sudo -i ,执行 update-alternatives --install /usr/bin/java java /home/jack/jdk1.6.0_12/bin/java 300 update-alternatives --install /usr/bin/javac javac /home/jack/jdk1.6.0_12/bin/javac 300 

 

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