Hi i downloaded java SDK includes jre and installed it. and i now difference between them, jre to run java program and, sdk is development kit which include compiler etc..and my code is running ,i mean i wrote hello.java to test my installations and it is working i compiled and run it. but i dont understand why my JRE is not working..None of the browser could detect my jre. So i go sun.com and download only jre and install it. After this installation browser can detect my jre. Now my question: is there any thing that after install the SDK that i should do to be able to run jre?