Ubuntu14.04 切换jdk1.6和open jdk1.7编译环境

首先保证openjdk正常安装：

sudo apt-get -y install openjdk-7-jdk 一条命令搞定

jdk1.6安装：

下载，执行安装 ./jdk-6u33-linux-x64.bin

配置环境变量：

sudo gedit /etc/environment

#PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"

#java

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/lib/jvm/java/jdk1.6.0_32/bin:/usr/lib/jvm/java/jdk1.6.0_32/jre/bin"

JAVA_HOME=/usr/lib/jvm/java/jdk1.6.0_32

JRE_HOME=/usr/lib/jvm/java/jdk1.6.0_32/jre

CLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib

#!/bin/bash

sudo update-alternatives --install /usr/bin/javah javah /usr/lib/jvm/java/jdk1.6.0_32/bin/javah 300

sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/java/jdk1.6.0_32/bin/javac 300

sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/java/jdk1.6.0_32/bin/java 300

sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/java/jdk1.6.0_32/bin/jar 300

sudo update-alternatives --install /usr/bin/javap javap /usr/lib/jvm/java/jdk1.6.0_32/bin/javap 300

sudo update-alternatives --install /usr/bin/jps jps /usr/lib/jvm/java/jdk1.6.0_32/bin/jps 300

sudo update-alternatives --install /usr/bin/jconsole jconsole /usr/lib/jvm/java/jdk1.6.0_32/bin/jconsole 300

sudo update-alternatives --install /usr/bin/javadoc javadoc /usr/lib/jvm/java/jdk1.6.0_32/bin/javadoc 300

sudo update-alternatives --install /usr/bin/appletviewer appletviewer /usr/lib/jvm/java/jdk1.6.0_32/bin/appletviewer 300

sudo update-alternatives --install /usr/bin/apt apt /usr/lib/jvm/java/jdk1.6.0_32/bin/apt 300

sudo update-alternatives --install /usr/bin/extcheck extcheck /usr/lib/jvm/java/jdk1.6.0_32/bin/extcheck 300

sudo update-alternatives --install /usr/bin/idlj idlj /usr/lib/jvm/java/jdk1.6.0_32/bin/idlj 300

sudo update-alternatives --install /usr/bin/jarsigner jarsigner /usr/lib/jvm/java/jdk1.6.0_32/bin/jarsigner 300

sudo update-alternatives --install /usr/bin/jdb jdb /usr/lib/jvm/java/jdk1.6.0_32/bin/jdb 300

sudo update-alternatives --install /usr/bin/javaws javaws /usr/lib/jvm/java/jdk1.6.0_32/bin/javaws 300

sudo update-alternatives --install /usr/bin/jhat jhat /usr/lib/jvm/java/jdk1.6.0_32/bin/jhat 300

sudo update-alternatives --install /usr/bin/jinfo jinfo /usr/lib/jvm/java/jdk1.6.0_32/bin/jinfo 300

sudo update-alternatives --install /usr/bin/jmap jmap /usr/lib/jvm/java/jdk1.6.0_32/bin/jmap 300

sudo update-alternatives --install /usr/bin/jrunscript jrunscript /usr/lib/jvm/java/jdk1.6.0_32/bin/jrunscript 300

sudo update-alternatives --install /usr/bin/jsadebugd jsadebugd /usr/lib/jvm/java/jdk1.6.0_32/bin/jsadebugd 300

sudo update-alternatives --install /usr/bin/jstack jstack /usr/lib/jvm/java/jdk1.6.0_32/bin/jstack 300

sudo update-alternatives --install /usr/bin/jstat jstat /usr/lib/jvm/java/jdk1.6.0_32/bin/jstat 300

sudo update-alternatives --install /usr/bin/jstatd jstatd /usr/lib/jvm/java/jdk1.6.0_32/bin/jstatd 300

sudo update-alternatives --install /usr/bin/keytool keytool /usr/lib/jvm/java/jdk1.6.0_32/bin/keytool 300

sudo update-alternatives --install /usr/bin/native2ascii native2ascii /usr/lib/jvm/java/jdk1.6.0_32/bin/native2ascii 300

sudo update-alternatives --install /usr/bin/orbd orbd /usr/lib/jvm/java/jdk1.6.0_32/bin/orbd 300

sudo update-alternatives --install /usr/bin/pack200 pack200 /usr/lib/jvm/java/jdk1.6.0_32/bin/pack200 300

sudo update-alternatives --install /usr/bin/policytool policytool /usr/lib/jvm/java/jdk1.6.0_32/bin/policytool 300

sudo update-alternatives --install /usr/bin/rmic rmic /usr/lib/jvm/java/jdk1.6.0_32/bin/rmic 300

sudo update-alternatives --install /usr/bin/rmid rmid /usr/lib/jvm/java/jdk1.6.0_32/bin/rmid 300

sudo update-alternatives --install /usr/bin/rmiregistry rmiregistry /usr/lib/jvm/java/jdk1.6.0_32/bin/rmiregistry 300

sudo update-alternatives --install /usr/bin/schemagen schemagen /usr/lib/jvm/java/jdk1.6.0_32/bin/schemagen 300

sudo update-alternatives --install /usr/bin/serialver serialver /usr/lib/jvm/java/jdk1.6.0_32/bin/serialver 300

sudo update-alternatives --install /usr/bin/servertool servertool /usr/lib/jvm/java/jdk1.6.0_32/bin/servertool 300

sudo update-alternatives --install /usr/bin/tnameserv tnameserv /usr/lib/jvm/java/jdk1.6.0_32/bin/tnameserv 300

sudo update-alternatives --install /usr/bin/unpack200 unpack200 /usr/lib/jvm/java/jdk1.6.0_32/bin/unpack200 300

sudo update-alternatives --install /usr/bin/wsgen wsgen /usr/lib/jvm/java/jdk1.6.0_32/bin/wsgen 300

sudo update-alternatives --install /usr/bin/wsimport wsimport /usr/lib/jvm/java/jdk1.6.0_32/bin/wsimport 300

sudo update-alternatives --install /usr/bin/xjc xjc /usr/lib/jvm/java/jdk1.6.0_32/bin/xjc 300
通过这一步将我们安装的jdk加入java选单。
然后执行：

#!/bin/bash

echo 2 | sudo update-alternatives --config java

echo -e '\n'

echo 2 | sudo update-alternatives --config javac

echo -e '\n'

echo 2 | sudo update-alternatives --config javah

echo -e '\n'

echo 2 | sudo update-alternatives --config jar

echo -e '\n'

echo 2 | sudo update-alternatives --config javap

echo -e '\n'

echo 2 | sudo update-alternatives --config jps

echo -e '\n'

echo 2 | sudo update-alternatives --config jconsole

echo -e '\n'

echo 2 | sudo update-alternatives --config javadoc

echo -e '\n'

echo 2 | sudo update-alternatives --config appletviewer

echo -e '\n'

echo 2 | sudo update-alternatives --config apt

echo -e '\n'

echo 2 | sudo update-alternatives --config extcheck

echo -e '\n'

echo 2 | sudo update-alternatives --config idlj

echo -e '\n'

echo 2 | sudo update-alternatives --config jarsigner

echo -e '\n'

echo 2 | sudo update-alternatives --config jdb

echo -e '\n'

echo 2 | sudo update-alternatives --config javaws

echo -e '\n'

echo 2 | sudo update-alternatives --config jhat

echo -e '\n'

echo 2 | sudo update-alternatives --config jinfo

echo -e '\n'

echo 2 | sudo update-alternatives --config jmap

echo -e '\n'

echo 2 | sudo update-alternatives --config jrunscript

echo -e '\n'

echo 2 | sudo update-alternatives --config jsadebugd

echo -e '\n'

echo 2 | sudo update-alternatives --config jstack

echo -e '\n'

echo 2 | sudo update-alternatives --config jstat

echo -e '\n'

echo 2 | sudo update-alternatives --config jstatd

echo -e '\n'

echo 2 | sudo update-alternatives --config keytool

echo -e '\n'

echo 2 | sudo update-alternatives --config native2ascii

echo -e '\n'

echo 2 | sudo update-alternatives --config orbd

echo -e '\n'

echo 2 | sudo update-alternatives --config pack200

echo -e '\n'

echo 2 | sudo update-alternatives --config policytool

echo -e '\n'

echo 2 | sudo update-alternatives --config rmic

echo -e '\n'

echo 2 | sudo update-alternatives --config rmid

echo -e '\n'

echo 2 | sudo update-alternatives --config rmiregistry

echo -e '\n'

echo 2 | sudo update-alternatives --config schemagen

echo -e '\n'

echo 2 | sudo update-alternatives --config serialver

echo -e '\n'

echo 2 | sudo update-alternatives --config servertool

echo -e '\n'

echo 2 | sudo update-alternatives --config tnameserv

echo -e '\n'

echo 2 | sudo update-alternatives --config unpack200

echo -e '\n'

echo 2 | sudo update-alternatives --config wsgen

echo -e '\n'

echo 2 | sudo update-alternatives --config wsimport

echo -e '\n'

echo 2 | sudo update-alternatives --config xjc

echo -e '\n'

注意一、java是小写，这个博客有些自动转变为首字母大写了

注意二、如果是两个jdk切换的，上面最好都执行一遍，不然有各种各样问题。如果只update java  javac  javap这几个是不行的，我就吃过亏了。