〖linux〗 fast switching between multiple JDK versions

Because of the need for work, it is often necessary to switch to JDK versions like my home directory with three JDK versions:

~/apt/jdk1. 6 . 0_34 # JDK6~/apt/jdk1. 7 . 0_67 # JDK7~/apt/jdk1. 8. 0_05 # JDK8

such as compiling Android complete system source code, Google recommends the use of JDK6

In the implementation of the work, due to the actual needs of the project, to use JDK7 to implement some tools

To make it easier to switch JDK versions, I wrote a script:

1#!/bin/SH2 # Usage:. this_file [Argvs]3 4Jdk6_home=~/apt/jdk1.6. 0_345Jdk7_home=~/apt/jdk1.7. 0_676Jdk8_home=~/apt/jdk1.8. 0_057 8 # Default JDK69  Case$1 inchTen jdk6) OneExport Java_home=$jdk 6_home A         ;; - jdk7) -Export Java_home=$jdk 7_home the         ;; - jdk8) -Export Java_home=$jdk 8_home -         ;; +* ) -Export Java_home=$jdk 6_home +         ;; A Esac at  -Export path= $JAVA _home/bin: $JAVA _home/jre/Bin: $PATH -Export classpath= $CLASSPATH: $JAVA _home/lib: $JAVA _home/jre/lib

How to use:

For example, execute in the shell when you need to switch the JDK7 . [Script file name] Jdk7

Premise: Download and extract JDK7 to ~/apt/jdk1.7.0_67(modify according to your own needs)

JDK version download Link:

Java SE 1.1:http://www.oracle.com/technetwork/java/javasebusiness/downloads/ java-archive-downloads-javase11-419415.html
Java SE 1.2:http://www.oracle.com/technetwork/java/javasebusiness /downloads/java-archive-downloads-javase12-419414.html
Java SE 1.3:http://www.oracle.com/technetwork/java/ Javasebusiness/downloads/java-archive-downloads-javase13-419413.html
Java SE 1.4:http://www.oracle.com/ technetwork/java/javasebusiness/downloads/java-archive-downloads-javase14-419411.html
JDK5 Download:/http　　Www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-javase5-419410.html
　　JDK6 Download: http://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase6-419409.html
JDK7 Download: http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
JDK8 Download:/http www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html