how to i set the environmental path?

Setting up the path for windows 

Assuming you have installed Java in c:\Program Files\java\jdk directory:

• Right-click on 'My Computer' and select 'Properties'.
• Click on the 'Environment variables' button under the 'Advanced' tab.
• Now, alter the 'Path' variable so that it also contains the path to the Java executable. Example, if the path is currently set to 'C:\WINDOWS\SYSTEM32', then change your path to read 'C:\WINDOWS\SYSTEM32;c:\Program Files\java\jdk\bin'.

path for windows 95/98/ME:

Assuming you have installed Java in c:\Program Files\java\jdk directory:

• Edit the 'C:\autoexec.bat' file and add the following line at the end:
  'SET PATH=%PATH%;C:\Program Files\java\jdk\bin'

 path for Linux, UNIX, Solaris:

Environment variable PATH should be set to point to where the Java binaries have been installed. Refer to your shell documentation if you have trouble doing this.

Example, if you use bash as your shell, then you would add the following line to the end of your '.bashrc: export PATH=/path/to/java:$PATH'

or use the commane set path="your path"
ex:set path="c:\programs\jdk\bin"