A. Download and install jdk
II. Configuration Environment Variables
JAVA_HOME:D:\Java\jdk1.8.0_25 CLASSPATH :.;%JAVA_HOME%\lib;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar; Path:;%JAVA_HOME%\bin;%JAVA_HOME%\jre\bin
III. Test
Enter cmd window at command
Java,javac,java –version