Java Program Error

Question

While I was learning a book, I came across a Java example. When I compiled it, I had no error. But when I ran it , it showed:

Exception in thread "main" java.lang.NoSuchMethodError: main

Since I am beginner in Java, I don't know what it is.

The program is:

import java.awt.*;
import java.awt.event.*;

class Party
{
public void buildInvite(){
    Frame f = new Frame();
    Label l = new Label("Party at Tim's");

    Button B = new Button("You Bet");
    Button c = new Button("Shoot me");
    Panel p = new Panel();
    p.add(l);
}
}

You simply have to create a main and the invoke new Party().buildInvite();. You may have to call f.setVisible(true) also. — Lynch, Jul 02 '11 at 16:31
See the ['Hello World' tutorial](http://download.oracle.com/javase/tutorial/getStarted/cupojava/index.html). — Andrew Thompson, Jul 02 '11 at 16:32
Read this Community Wiki answer - [Causes of 'java.lang.NoSuchMethodError: main Exception in thread "main"'](http://stackoverflow.com/questions/5407250/causes-of-java-lang-nosuchmethoderror-main-exception-in-thread-main) — Stephen C, Jul 02 '11 at 16:34
BTW - a beginner should not be looking to code GUIs. Get used to using Java from the command line first. — Andrew Thompson, Jul 02 '11 at 16:37

score 2 · Answer 1 · answered Jul 02 '11 at 16:36

If you still want to see the execution of this code try this version:

class Party{
        public void buildInvite(){
        Frame f = new Frame();
        Label l = new Label("Party at Tim's");
        Button B = new Button("You Bet");
        Button c = new Button("Shoot me");
        Panel p = new Panel();
        p.add(l);
        p.add(B);
        p.add(c);
        f.add(p);
        f.setVisible(true);
        }

        public static void main(String[] args) {
            new Party().buildInvite();
        }
    }

score 1 · Answer 2 · answered Jul 02 '11 at 16:33

1

This code can't be fixed with less work than a complete rewrite. It doesn't have a main method, cause the frame to show or add the panel to it. Find a better tutorial.

answered Jul 02 '11 at 16:33

Mike Samuel

109,453
27
204
234

1

*"Find a better tutorial."* You forgot to mention *"..and it is so old it is teaching AWT".* – Andrew Thompson Jul 02 '11 at 16:36

score 1 · Answer 3 · answered Jul 02 '11 at 16:35

1

All Java programs must have a main method. This is what the JVM looks for to start your program.

answered Jul 02 '11 at 16:35

Ash Burlaczenko

21,581
14
63
95

1

So an applet is not a program? What about a servlet? – Andrew Thompson Jul 02 '11 at 17:18

Java Program Error

3 Answers3