Setting PATH Variables

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  • The PATH is the system or user variable that your operating system uses to locate needed executables from the command line or Terminal window.
  • The PATH system or user variable can be set using System Utility in control panel on Windows, or in your shell's startup file on Linux and Solaris.
In simple words PATH helps the Operating System to find where Java is installed.

Setting Path on Windows

Note: You need to copy the location of the bin folder of the Java installation directory in the PATH's value field.

Example for windows:





Windows 8

  • Drag the Mouse pointer to the Right bottom corner of the screen
  • Click on the Search icon and type: Control Panel
  • Click on -> Control Panel -> System -> Advanced
  • Click on Environment Variables, under User Variables, find PATH, and click on it.
  • In the Edit windows, modify PATH by adding the location of the class to the value for PATH. If you do not have the item PATH, you may select to add a new variable and add PATH as the name and the location of the java bin folder as the value.
  • Close the window.
  • Reopen Command prompt window, and run your java code.

Windows 7

  • Select Computer from the Start menu
  • Choose System Properties from the context menu
  • Click Advanced system settings > Advanced tab
  • Click on Environment Variables, under User Variables, find PATH, and click on it.
  • In the Edit windows, modify PATH by adding the location of the class to the value for PATH. If you do not have the item PATH, you may select to add a new variable and add PATHas the name and the location of the java bin folder as the value.
  • Reopen Command prompt window, and run your java code.

 Windows XP

  • Start -> Control Panel -> System -> Advanced
  • Click on Environment Variables, under User Variables, find PATH, and click on it.
  • In the Edit windows, modify PATH by adding the location of the class to the value for PATH. If you do not have the item PATH, you may select to add a new variable and add PATHas the name and the location of the class as the value.
  • Close the window.
  • Reopen Command prompt window, and run your java code.


Windows Vista
  • Right click My Computer icon
  • Choose Properties from the context menu
  • Click Advanced tab (Advanced system settings link in Vista)
  • In the Edit windows, modify PATH by adding the location of the class to the value for PATH. If you do not have the item PATH, you may select to add a new variable and add PATHas the name and the location of the class as the value.
  • Reopen Command prompt window, and run your java code.

Setting Path on Solaris and Linux

To find out if the java executable is in your PATH, execute:

% java -version

This will print the version of the java executable, if it can find it. If you get error java: Command not found. Then path is not properly set.

To find out which java executable the first one found in your PATH, execute:

% which java

Below are the steps to set the PATH permanently,

For bash Shell:

  • Edit the startup file
  • (~/ .bashrc)
  • Modify PATH variable:
  • PATH="$PATH":/usr/local/jdk1.6.0/bin
  • export PATH
  • Save and close the file
  • Open new Terminal window
  • Verify the PATH is set properly
  • % java -version

For C Shell (csh):

  • Edit startup file (~/ .cshrc)
  • Set Path
  • set path="$PATH":/usr/local/jdk1.6.0/bin
  • Save and Close the file
  • Open new Terminal window
  • Verify the PATH is set properly
  • % java -version

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