First of all, you should have installed the Java JDK, the author installed is: jdk-7u7-windows-x64
Next the main talk about how to configure the environment variables of Java, but also for the next day I forgot to make a backup
1. Go to the "Properties" option of "Computer" and select "Advanced system Settings" as shown in:
2. When you click on "Advanced system Settings", you will see the dialog box as shown, select "Environment variables":
3. After clicking on "Environment variable", you will see the dialog box as shown:
4, the next step is the specific configuration process:
①, select "New" as shown,
"Variable name": Java_home
"Variable value": C:\Program files\java\jdk1.7.0_07
Note: the "Variable Value" column mainly fills in the path where you install Java, which may vary depending on the individual situation
②, after the previous step, select "Path" in the environment variable, as shown in:
Edit after Selection:
At the top of the "Variable Value" column, add the following code:
%java_home%\bin;%java_home%\jre\bin;
Note: The above code is best for one character, because Java_home has limited the path to your JDK, and each version of Java JDK should be made up of these things.
③, after the previous step is determined, then "new":
"Variable name": ClassPath
"Variable value":.; %java_home%\bin;%java_home%\lib\dt.jar;%java_home%\lib\tools.jar
Note: The above code is best also a character unchanged paste up, "variable value" the most front.; Don't miss out.
After completing the three steps above, the configuration of the environment variable has been completed.
5, check the environment variables set up: Call "cmd" check
1. Input: "Java", you should see the following things:
2, enter "Javac", you should see the following things:
3, enter "Java-version", you should see the following things:
If the above three pictures are seen, congratulations, the environment variable configuration is OK!
6. Why should I configure the environment variables for Java?
Please move this blog, although it is about Linux, but Windows is the same truth
Transferred from: http://www.cnblogs.com/zhj5chengfeng/archive/2013/01/01/2841253.html
Configuring Java environment variables under Win7 [go]