Ubuntu12.04 LTS 中安装JAVA6

本人现在在做Android项目，需要在Ubuntu12.04中编译android源码，遇到一个步骤为安装jdk6

官方文档（http://source.android.com/source/initializing.html）中说明如下

The Sun JDK is no longer in Ubuntu's main package repository. In order to download it, you need to add the appropriate repository and indicate to the system which JDK should be used.

Java 6: for Gingerbread and newer

$ sudo add-apt-repository "deb http://archive.canonical.com/ lucid partner"
$ sudo apt-get update
$ sudo apt-get install sun-java6-jdk

然而不一定成功

解决办法如下：

1、oracle官网下载jdk-6u45-linux-x64.bin，在ubuntu中会下载到Download文件夹中
2、mkdir /opt/java/64
3、cp jdk-6u45-linux-x64.bin /opt/java/64
4、chmod u+x /opt/java/64/jdk-6u45-linux-x64.bin
5、./jdk-6u45-linux-x64.bin
6、sudo update-alternatives --install /usr/bin/java java /opt/java/64/jdk1.6.0_45/bin/java 1  
7、sudo update-alternatives --install /usr/bin/javac javac /opt/java/64/jdk1.6.0_45/bin/javac 1 
8、sudo update-alternatives --install /usr/bin/jar jar /opt/java/64/jdk1.6.0_45/bin/jar 1
...
9、设置软链接（http://koliy.iteye.com/blog/1472827）

　　在编译android环境时，java -version 命令明明能够正确表示java已经安装成功，环境设置正确。但是，在编译android时，检查java版本却通不过去：提示/bin/bash: java: command not found  问题，重装jdk几次仍是出现这种问题，没办法只好做个软链接了
sudo ln -s /opt/java/64/jdk1.6.0_45/bin/jar /bin/jar
sudo ln -s/opt/java/64/jdk1.6.0_45/java /bin/java
sudo ln -s/opt/java/64/jdk1.6.0_45/javac /bin/javac
sudo ln -s/opt/java/64/jdk1.6.0_45/javah /bin/javah
sudo ln -s/opt/java/64/jdk1.6.0_45/javadoc /bin/javadoc
sudo ln -s/opt/java/64/jdk1.6.0_45/javaws /bin/javaws

10、java -version