Swing Examples - Using Buttons

Following example showcase how to use standard buttons in a Java Swing application.

We are using the following APIs.

• JButton − To create a standard button.

• JButton.setEnabled(false); − To disable a button.

• getRootPane().setDefaultButton(submitButton); − To make a button as default button to be clicked when enter key is pressed.

Example

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

public class SwingTester {
   public static void main(String[] args) {
      createWindow();
   }

   private static void createWindow() {    
      JFrame frame = new JFrame("Swing Tester");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      createUI(frame);
      frame.setSize(560, 200);      
      frame.setLocationRelativeTo(null);  
      frame.setVisible(true);
   }

   private static void createUI(final JFrame frame){  
      JPanel panel = new JPanel();
      LayoutManager layout = new FlowLayout();  
      panel.setLayout(layout);       

      JButton okButton = new JButton("Ok");
      JButton cancelButton = new JButton("Cancel");
      cancelButton.setEnabled(false);
      JButton submitButton = new JButton("Submit");

      okButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            JOptionPane.showMessageDialog(frame, "Ok Button clicked.");
         }
      });

      submitButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            JOptionPane.showMessageDialog(frame, "Submit Button clicked.");
         }
      });

      frame.getRootPane().setDefaultButton(submitButton);

      panel.add(okButton);
      panel.add(cancelButton);
      panel.add(submitButton);

      frame.getContentPane().add(panel, BorderLayout.CENTER);    
   }
}