Ubuntu 下安装 JDK6
1,下载 JDK6 到 /opt/java/jdk-6u26-linux-i586.bin

2,

chmod 755 jdk-6u26-linux-i586.bin

3,

./jdk-6u26-linux-i586.bin

4,安装完毕后，

gedit /etc/profile

5,将如下信息复制到profile文件末尾：

#set java environment JAVA_HOME=/opt/java/jdk1.6.0_26export JRE_HOME=/opt/jdk1.6.0_26/jre export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH  

6,

shutdown -r now

, 重启。

7,java -version，javac -version 验证安装成功。

chen@chen-desktop:/opt/java$ java -versionjava version "1.6.0_26"Java(TM) SE Runtime Environment (build 1.6.0_26-b03)Java HotSpot(TM) Client VM (build 20.1-b02, mixed mode, sharing)chen@chen-desktop:/opt/java$ javac -versionjavac 1.6.0_26