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. By installing the java jar they meant that the jar is available to your program (physically present and found in your class path). If the Path to the jar was not setup then you have to options: + copy the jar file to your existing path + include the jar file in the command line. One way to validate these variables is simply to echo their values with a command prompt. The call to echo %JAVA_HOME% should display the full path to the Java installation folder, while, on the echo %PATH% call, you should see the C:\_jdk1.2.0\bin included. # validate that the JAVA_HOME environment variable was configured echo %JAVA_HOME% C The option you pass to the installer are only valid for an installation configuration file. If you do not want to use a configuration file you can use the following command line options for a silent install. After using a configuration file to install the JRE, the JRE MSI Installer saves it as a system runtime configuration file in C:\Program Files (x86)\Common Files\Oracle\Java\java_settings.cfg. The Configuration Options table identifies which options and values are saved in the system runtime configuration file. Previous Page. Just type jdk-21_windows-x64_bin.exe /s in the command prompt. Visit the Java Downloads page. Click the Windows tab. Choose and download your Java version. There's currently JDK 21 and JDK 17 The argument files can also contain the main class name and all options. If an argument file contains all of the options required by the java command, then the command line could simply be: java @argfile. See java Command-Line Argument Files for a description and examples of using @-argfiles. Extra Options for Java This document tells how to manually install the JRE using the .exe that launches the MSI installation. The installer options are explained. Command Line Install. In Java SE 6 The Windows offline installation command has the same syntax as the Windows Installation. The command is as follows: IeFIQW.