Thread: Putting images in GUI. Images in source file dont seem to be recognised.

This is my class with the GUI:

import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JPasswordField;
import javax.swing.JOptionPane;
import javax.swing.JButton;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
 
 
public class GUI extends JFrame{
 
		private JButton reg;
		private JButton custom;
 
		public GUI(){
			super("The Tittle");
			setLayout(new FlowLayout());
 
			reg = new JButton("reg Button");
			add(reg);
 
			Icon b = new ImageIcon(getClass().getResource("x.png"));
			Icon c = new ImageIcon(getClass().getResource("y.png"));
 
		custom = new JButton("Custom", b);
		custom.setRolloverSelectedIcon(c);
		add(custom);
 
		HandlerClass handler = new HandlerClass();
		reg.addActionListener(handler);
		custom.addActionListener(handler);
 
 
		}
 
		private class HandlerClass implements ActionListener{
			public void actionPerformed(ActionEvent event){
				JOptionPane.showMessageDialog(null, String.format("%s", event.getActionCommand()));
			}
		}
}

then my main class:

import javax.swing.JFrame;
 
class Apples{
 
    public static void main (String args[]){
 
    	GUI go = new GUI();
    	go.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    	go.setSize(300,200);
    	go.setVisible(true);
 
    }
  }

Eclipse error message:

Exception in thread "main" java.lang.NullPointerException
	at javax.swing.ImageIcon.<init>(ImageIcon.java:205)
	at GUI.<init>(GUI.java:26)
	at Apples.main(Apples.java:7)

i think the problem is to do with my images not being recognised. I put them in my source in User>...>workspace>src which is correct as far as i know. From what i know the images should show up if i look at my src file in eclipse but they dont. I tried changing the file type from .png to .jpg but it makes no difference. Help much appreciated!

--- Update ---

i solved this but im not sure how to delete the thread lol

--- Update ---

i solved this but im not sure how to delete the thread lol