In order to set up the environment variables, first, you need to download and install the latest JDK version. You can download this from here: https://goo.gl/Djcyjp.
You can look for the file according to your system configurations.
Once you are done, you can find the Java root folder here: C:\Program Files
Now to set the environment variables:
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Right click on “My Computer” and go to the properties.
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In System properties windows, click on the Advanced tab.
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In this tab, click on” Environment Variables”.
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Click on new to add new variable:
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Now add the below variables one by one:
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JAVA_HOME : C:\Program Files\Java\jdk1.8.0_112
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JDK_HOME : %JAVA_HOME%
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JRE_HOME : %JAVA_HOME%\jre
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CLASSPATH : .;%JAVA_HOME%\lib;%JAVA_HOME%\jre\lib
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PATH : your-unique-entries;%JAVA_HOME%\bin
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Once done, click on “OK” and exit.