Ubuntu10版本安装JAVA5和JAVA6

JAVA5安装：
1.sudo vi /etc/apt/sources.list，将安装源更改为ubuntu 9.04的安装源为：
deb http://archive.ubuntu.com/ubuntu/ jaunty main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ jaunty-security main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ jaunty-updates main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ jaunty-proposed main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ jaunty-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ jaunty main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ jaunty-security main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ jaunty-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ jaunty-proposed main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ jaunty-backports main restricted universe multiverse
2.sudo apt-get update
3.sudo apt-get install sun-java5-jdk

JAVA6安装：
1.sudo apt-add-repository "deb http://archive.canonical.com/ lucid partner" 
2.sudo apt-get update
3.sudo apt-get install sun-java6-jdk

 

 

环境变量的设置：
1.sudo vi /etc/profile,添加下列语句
# Set JAVA (这里是注释 不是SHELL命令)
# 使用java5
JAVA_HOME=path_to_java5
# 使用java6
#JAVA_HOME=path_to_java6
JRE_HOME=$JAVA_HOME/jre
PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH
CLASSPATH=.:$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
export JAVA_HOME JRE_HOME PATH CLASSPATH
2. source /etc/profile

 

查看当前使用的java版本：
1. java -version
2. javac -version