The above instructions would still remain same. Open the control panel and type envir in search bar. Click on edit the system environment variables. Click on environment variables in the advanced system properties. Click on path mentioned in user variables. Edit the path, and click new and paste the path of java jdk.
You will use the java command to execute your program. From the Command Prompt, type the java command below: C:\Users\\introcs\hello> java HelloWorld Hello, World. You should see the output of the program. To make our standard libraries accessible to Java, use the command java-introcs instead.

I install Java with: jdk-7u17-windows-x64-1.0.exe /s INSTALLDIR="C:\jdk1.7.0_17" How to uninstall java from command line independent of version currently

@user716468, There is a GUI way to do this in windows instead of command line. If you are on windows 7, just type var in start menu search and click on Edit Environment Variables. If you are on Windows XP, right click My Computer, Click on properties, go to advanced tab and click on the Environment variables button on the bottom side.
Launching A JAR File. To execute a JAR file, especially one that has an entry point defined (like a main method), you can use the java command with the -jar flag. Syntax: java -jar path_to_jar_file. Example: $ java -jar MyApp.jar. 👉. After the code: Here, we're using the java command to run the MyApp.jar file. To do so, Navigate to your command prompt shell and run the following command to make sure everything is up-to-date: sudo apt-get update. To install Git, run the following command: sudo apt-get install git-all. Once the command output has completed, you can verify the installation by typing: git version. 3T0l9V.
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    • install java command line windows