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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: 30-Jul-2019
6K+ Views
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