Configuring the JDK environment variables

1, download the JDK,:http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html, if it is a 32-bit system , download the windows-x86 version, or if the 64-bit system downloads the windows-x64 bit.

The installation process will appear two times to select the installation path prompt, the first time is to choose the path to install the JDK, the  second is to choose  where to install the JRE, the two paths do not have the same location, because the JDK also has a JRE file, otherwise it will be overwritten.

Next is the environment variable:
1. Select "New System Variable"--pop up the "New System Variable" dialog box, enter "Java_home" in the "Variable name" text box, enter the installation path of the JDK in the "Variable Value" text box, click the "OK" button
2. View the path variable in the system Variables options area, and if it does not exist, create a new variable path, otherwise select the variable, click the Edit button, and add "%java_home%\bin;%java_home%\jre\bin;" At the beginning of the Variable Value text box. or direct "%java_home%\bin;", click the OK button
3. View the CLASSPATH variable in the system Variables options area, and if it does not exist, create a new variable classpath, otherwise select the variable, click the Edit button, and then add "at the beginning of the Variable Value text box."; %java_home%\lib\dt.jar;%java_home%\lib\tools.jar;

Configuring the JDK environment variables