Thank you for the tutorials. But i am a bit confused especially regarding the JComboBox tutorial. I followed exactly the way you wrote your code but when i try to run it, it says program terminated at jComboBox1.Nic150.main(Nic150.java:7)...Nic150 is my class name and here i was trying to call my second class into the main method. What do you think might be the problem. I am using eclipse.