Update the JDK PATH Variable

    Choose Start, Control Panel, (Performance and Maintenance,) System. 

    Select the Advanced tab and then Environment Variables. Select "Path" in
    the System Variables and click Edit.  Add a semicolon (;) to the right
    end of the "Path" and then type 

        C:\Program Files\Java\jdk1.6.0_04\bin  
 
    The new path takes effect in each new Command Prompt window you open
    after setting the PATH variable. 

(Courtesy W.W. Long, 6/20/2006, as updated by M. Pickard)