SwingControlJButtonDemo.java

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SwingControlJButtonDemo {

	   private JFrame mainFrame;
	   private JLabel headerLabel;
	   private JLabel statusLabel;
	   private JPanel controlPanel;

	   public SwingControlJButtonDemo(){
	      prepareGUI();
	   }

	   public static void main(String[] args){
	      SwingControlJButtonDemo  swingControlDemo = new SwingControlJButtonDemo();      
	      swingControlDemo.showButtonDemo();
	   }

	   private void prepareGUI(){
	      mainFrame = new JFrame("Java Swing Examples");
	      mainFrame.setSize(400,400);
	      mainFrame.setLayout(new GridLayout(3, 1));
	      mainFrame.addWindowListener(new WindowAdapter() {
	         public void windowClosing(WindowEvent windowEvent){
	            System.exit(0);
	         }        
	      });    
	      headerLabel = new JLabel("", JLabel.CENTER);        
	      statusLabel = new JLabel("",JLabel.CENTER);    

	      statusLabel.setSize(350,100);

	      controlPanel = new JPanel();
	      controlPanel.setLayout(new FlowLayout());

	      mainFrame.add(headerLabel);
	      mainFrame.add(controlPanel);
	      mainFrame.add(statusLabel);
	      mainFrame.setVisible(true);  
	   }
	    
	   private static ImageIcon createImageIcon(String path, 
	      String description) {
	      java.net.URL imgURL = SwingControlDemo.class.getResource(path);
	      if (imgURL != null) {
	         return new ImageIcon(imgURL, description);
	      } else {            
	         System.err.println("Couldn't find file: " + path);
	         return null;
	      }
	   }   

	   private void showButtonDemo(){

	      headerLabel.setText("Control in action: Button"); 

	      //resources folder should be inside SWING folder.
	      ImageIcon icon = createImageIcon("/resources/java_icon.png","Java");

	      JButton okButton = new JButton("OK");        
	      JButton javaButton = new JButton("Submit", icon);
	      JButton cancelButton = new JButton("Cancel", icon);
	      cancelButton.setHorizontalTextPosition(SwingConstants.LEFT);   

	      okButton.addActionListener(new ActionListener() {
	         public void actionPerformed(ActionEvent e) {
	            statusLabel.setText("Ok Button clicked.");
	         }          
	      });

	      javaButton.addActionListener(new ActionListener() {
	         public void actionPerformed(ActionEvent e) {
	            statusLabel.setText("Submit Button clicked.");
	         }
	      });

	      cancelButton.addActionListener(new ActionListener() {
	         public void actionPerformed(ActionEvent e) {
	            statusLabel.setText("Cancel Button clicked.");
	         }
	      });

	      controlPanel.add(okButton);
	      controlPanel.add(javaButton);
	      controlPanel.add(cancelButton);       

	      mainFrame.setVisible(true);  
	   }
}