Java-Buddy

Example to implement ActionListener for Swing UI elements.

package javamyframe;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
/**
 * @web http://java-buddy.blogspot.com/
 */
public class JavaMyFrame extends JFrame 
 implements ActionListener{
 JTextArea textArea;
 JButton button1, button2;
 
 public static void main(String[] args) {
 SwingUtilities.invokeLater(new Runnable() {
 public void run() {
 createAndShowGUI();
 }
 });
 }
 private static void createAndShowGUI() {
 JavaMyFrame myFrame = new JavaMyFrame();
 myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
 myFrame.prepareUI();
 myFrame.pack();
 myFrame.setVisible(true);
 }
 
 private void prepareUI(){
 textArea = new JTextArea();
 textArea.setEditable(false);
 JScrollPane panel = new JScrollPane(textArea);
 panel.setPreferredSize(new Dimension(300, 100));
 
 button1 = new JButton("My Button 1");
 button1.addActionListener(this);
 button2 = new JButton("My Button 2");
 button2.addActionListener(anotherActionListener);
 
 getContentPane().add(panel, BorderLayout.CENTER);
 getContentPane().add(button1, BorderLayout.PAGE_START);
 getContentPane().add(button2, BorderLayout.PAGE_END);
 }
 @Override
 public void actionPerformed(ActionEvent e) {
 textArea.setText(e.getActionCommand());
 }
 
 ActionListener anotherActionListener = new ActionListener(){
 @Override
 public void actionPerformed(ActionEvent e) {
 textArea.setText("anotherActionListener: " 
 + e.getActionCommand());
 }
 
 };
}

Related: Example of using KeyListener

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