Syntax error How to add action listener to JButton in Java

How to add action listener to JButton in Java

The following is an example to add action listener to Button:

Example

package my;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class SwingDemo {
   private JFrame frame;
   private JLabel headerLabel;
   private JLabel statusLabel;
   private JPanel controlPanel;
   public SwingDemo(){
      prepareGUI();
   }
   public static void main(String[] args){
      SwingDemo swingControlDemo = new SwingDemo();
      swingControlDemo.showButtonDemo();
   }
   private void prepareGUI(){
      frame = new JFrame("Java Swing");
      frame.setSize(500,500);
      frame.setLayout(new GridLayout(3, 1));
      frame.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());
      frame.add(headerLabel);
      frame.add(controlPanel);
      frame.add(statusLabel);
      frame.setVisible(true);
   }
   private void showButtonDemo(){
      headerLabel.setText("Button Demo");
      JButton okButton = new JButton("OK");
      okButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            statusLabel.setText("Ok Button is clicked here");
         }
      });
      controlPanel.add(okButton);
      frame.setVisible(true);
   }
}

Output

Now, after clicking the OK button above, the following is visible:

Updated on: 2019-07-30T22:30:26+05:30

10K+ Views

Kickstart Your Career

Get certified by completing the course

Get Started
Advertisements