Java environment variable settings

Downloaded the win7 64-bit Java installation package from the official web, as shown in:

After the installation of the path:

Now it's time to start configuring environment variables:

First step: Create a new java_home, and fill in the installation path for the Java JDK as shown in:

The second step is to create the classpath, which tells the JDK to look up the current directory's class file when searching for class, variable values:.; %java_home%\lib\dt.jar;%java_home%\lib\tools.jar, pay attention to the preceding points.

The third step, set path, this is the system has a variable name, add ;%java_home%\bin;

OK, to this end, next test, open cmd, enter java,java-version, javac three command, if the following information appears, indicating that the setting is successful.

Java environment variable settings