Problems calling a class with static main

Question

I was wondering how this would interfere with the main class when called, I have found no suitable way to make a main class and call it in a final.

 import java.awt.*;
  import java.awt.event.*;
import java.util.*;
 import java.io.*;
 import javax.imageio.*;
  import javax.swing.*;


 class Converter extends JFrame  implements 
 KeyListener, ItemListener, MouseListener {


//insert body here//    


@Override
        public void paintComponents (Graphics g)  {g.drawImage(icon.getImage(), 0, 20, 500,210, this);
        super.paintComponents (g);
        Color transparent = new Color (0, true);
        background.setBackground(transparent);
        repaint ();
        background.setVisible(true);
        pack();
        setContentPane(background);
        background.setLayout(new FlowLayout());

        add (background);
        }    
            }











  class ShowconverterFrame  {
     public static void main (String args []) {
        new Converter ();
        }
}

Hi I am trying to figure out why this wont work... any help is appreciated! It returns with "no main class found" and that it cannot be declared as static. I just added this piece to the body and all of the sudden the whole things stops working. I have been trying to implement a JPanel in which I have an JLabel that is an image.

Because I didn't receive the paycheck from you to go over your code. — Nico, May 05 '13 at 01:49
Yeah start-over and build one functionality at a time. This looks like a very bad copy paste job. And next time you ask a question here, be more specific about what you've tried and what the error is. Also post small bits of executable code. — Nico, May 05 '13 at 01:56
Is this better to process, and by one functionality at a time do you mean building each button as a separate class then calling the class in the main? — Potatoesforfish, May 05 '13 at 02:03
count your curly brackets for starters. And remove those ..... (periods) — Bjørn Bråthen, May 05 '13 at 02:08

score 0 · Accepted Answer · edited May 23 '17 at 11:51

Okay, first of all: there's more to your Converter class, right (Later edit: when I wrote this I was referring to the initial, longer code you had posted)? You have implemented all the methods in those 3 interfaces? In case you don't need them all, I suggest you take a look at Adapters. Here's a topic in which the differences between Listeners and Adapters are discussed: What is the difference between listeners and adapters?. It feels rather bad practice to implement so many interfaces with so many methods to override if you don't need all of them.

Now, if your Converter class is fully functional, a functional entry-point class should look like this:

public class ShowconverterFrame  {
     public static void main (String [] args) {
        new Converter().setVisible(true);
     }
}

Put this code in a different .java file in the same package(named ShowconverterFrame.java) and run it. Also, if you're not using an IDE, Netbeans is easy to use for beginners, it would help you a lot. :)

Aaand... the serial version id has the following purpose: What is a serialVersionUID and why should I use it? . As you can see, it has nothing to do with the answer to your question, but it's good to know.

Yes, there is more to my converter class, I had buttons and panels attached to it. I have adapters on them, but I took down the full program as i am new to this and people were asking for a simpler piece to work with. My main method cannot be declared static. As a result my main will not be found and the program will exit. I am not using an IDE. I am downloading Netbeans right now. Thanks for the help! — Potatoesforfish, May 05 '13 at 02:28

Problems calling a class with static main

1 Answers1