I am using the free install version of JAVA1.7, if you want to access the JDK can contact me to ask.
1. Start configuring environment variables, right-click My Computer---properties-----advanced---environment variables,
2. 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 (that is, the folder path of step 5), click the "OK" button,
3. 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 the%java_home%\bin;%java_home%\jre\ at the beginning of the Variable Value text box bin; " or direct "%java_home%\bin;", click the OK button,
4. 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 add" at the beginning of the Variable value text box.; %java_home%\lib\dt.jar;%java_home%\lib\tools.jar; ".
5. Now test whether the environment variable is configured successfully or not. Enter "Java-version" and "JAVAC" in the DOS command Line window, and the output Help information is configured correctly.
Configuring environment variables for a free-install version of JAVA1.7