How to configure two JDK configurations and Javac solutions for a single computer

First , How to configure two installed JDK on a single computer

First, prepare the path for the two JDK. Start the following steps:

1) Create a new two sub-java_home system variable in the system variable summary:

1. variable name : java_home8

　　　　　　　　variable Value : ' Path to JDK 1.8 '

2. variable name : java_home7

　　　　　　　　variable Value : ' Path to JDK 1.7 '

2) Create a new variable java_home for switching versions:

1. variable name :java_home

　　　　　　　　variable Value :%java_home8%(change to%java_home7 with 1.7)

Complete diagram:

　　　　　　

3) Create a new classpath in the user's environment variable, and if not, create a new

　　　　　　classpath=.; %java_home%\lib;%java_home%\lib\tools.jar (Note: Add ' after value '; ' If the previous steps are consistent with my copy past the line

4) Add a variable to the system environment variable PATH:

　　　　　　%java_home%lib\dt.jar\%java_home%\lib\tools.jar\

5) configuration in path in user environment variable

　　　　　%java_home%\bin;\%java_home%\jre\bin;\ (add to the front)

　

Note: Running use can only have one JDK, because there can only be one you, cannot simultaneously exist a high you and a short one. (Accept your rebuttal, study QQ e-mail: [email protected])

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Second,JAVA can use Javac cannot use the solution

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How to configure two JDK configurations and Javac solutions for a single computer