1. Check If Java is Already Installed
java -version
javac --version
2. Download Java
Go to download page.
3. Install Java from downloaded .exe file
4. Configure Environment Variable
Start Menu -> Search -> Edit System Environment Variables -> Environment Variable -> NEW -> Enter "JAVA_HOME" and "PATH_TO_JDK"
5. Test in Command Prompt
echo %JAVA_HOME%
java -version
javac -version