I have today installed java platform se 1.6.0_05-b13 and java development kit 6 and yet when i tried to compile a program from the command prompt window i got "javac is not recognized as an internal or external command operable program or batch file". can anyone tell me why this has happened? i have never been able to get javac to work on any of my own computers in 3 years of (limited) java programming. i have always had this problem and it's time i did something about it!