搜索 java ppa

//sudo apt-add-repository ppa:flexiondotorg/java

sudo apt-add-repository ppa:sun-java-community-team/sun-java6

sudo apt-get update

sudo apt-get install sun-java6-jre sun-java6-plugin

sudo apt-get install sun-java6-jdk

设置当前默认的java解释器和编译器： (如果没有安装多个java虚拟机的话可以跳过这一步。)

sudo update-alternatives --config java

update-alternatives - maintain symbolic links determining default commands

export JAVA_HOME=/usr/lib/jvm/java-6-sun

export JRE_HOME=/usr/lib/jvm/java-6-sun/jre

export CLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH

Testing:

java –version

Create HelloWorld.java ->

public class HelloWorld {    public static void main(String[] args) {        System.out.println("Hello, World!");    }}

javac HelloWorld.java

java HelloWorld