Trying to compile program using Swing.

Question

I am trying to compile a SWING program (i.e. JFrame, JButton etc). Program does not have main method.
Obviously when I compile, I get
Exception in thread "main" java.lang.NoSuchMethodError: main.
Isnt it allowable to have a Swing pgm without a main method ???
Am I missing something obvious? Do I need to move a Swing jar file somewhere? Using J2SDK1.4.0 on WindowsME. Java is installed OK, because I can compile and execute other basic programs..

Answer 1

No, all Java programs, just like C/C++ require a main() method entry point.
Typically, in a Swing program, all you need to this is this (at the very minimum)
public static void main(String[] args) {
JFrame myAppFrame = new JFrame();
myAppFrame.show();
Usually you don't create a generic JFrame but instead extend your own class from a JFrame and put all of the initialization (JMenuBars, JPanels, windowlisteners, etc) in its constructor.