I have started learning java now. So, I decided to practise a bit at home. For that I downloaded and installed JDK 1.5 on my system. I am still on basics of java as I've just began. I compiled and ran one-two program without problems. But, when I come to the program below, I get an error code. Here the program And here the error message I get This program ran fine in my classes on windows server 2000 and JDK1.3. Also, can anyone suggest me a good, free GUI application for java pragramming eg. Jcreator, which I got but it uses too much memory.