Ubuntu12.04 LTS 中安装JAVA6

$sudoadd-apt-repository"debhttp://archive.canonical.com/lucidpartner"
$sudoapt-getupdate
$sudoapt-getinstallsun-java6-jdk

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、cpjdk-6u45-linux-x64.bin/opt/java/64
4、chmodu+x/opt/java/64/jdk-6u45-linux-x64.bin
5、./jdk-6u45-linux-x64.bin
6、sudoupdate-alternatives--install/usr/bin/javajava/opt/java/64/jdk1.6.0_45/bin/java1
7、sudoupdate-alternatives--install/usr/bin/javacjavac/opt/java/64/jdk1.6.0_45/bin/javac1
8、sudoupdate-alternatives--install/usr/bin/jarjar/opt/java/64/jdk1.6.0_45/bin/jar1
...
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:commandnotfound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
sudoln-s/opt/java/64/jdk1.6.0_45/bin/jar/bin/jar
sudoln-s/opt/java/64/jdk1.6.0_45/java/bin/java
sudoln-s/opt/java/64/jdk1.6.0_45/javac/bin/javac
sudoln-s/opt/java/64/jdk1.6.0_45/javah/bin/javah
sudoln-s/opt/java/64/jdk1.6.0_45/javadoc/bin/javadoc
sudoln-s/opt/java/64/jdk1.6.0_45/javaws/bin/javaws

10、java-version