java.awt.event.ActionListener Java Example

The java.awt.event.ActionListener interface is responsible for processing events java.awt.event.ActionEvent action generated by the drive buttons (Button), selection items (MenuItem) in suspended (drop-down) or independent menus (popup) at Pressing the “Enter” in inboxes (TextField) and double-click boxes list (List). Its implementation requires the inclusion of the actionPerformed method in these classes.

As a complement, the ActionEvent event has the following specific methods associated with:

import javax.swing.*; 
 import java.awt.*; 
 import java.awt.event.*; 
 public class JavaExampleHello2JApplet extends JApplet implements ActionListener 
  { 
    JLabel LblGrtng = new JLabel("Hi Welcome...!Who are you?"); 
    Font FntOne = new Font("Times New Roman", Font.BOLD, 36); 
    Font FntTwo = new Font("Times New Roman", Font.ITALIC, 48); 
    JTextField TxtAns = new JTextField(10); 
    JButton BtnClck = new JButton("Click Here"); 
    JLabel LblPrsnlGrtng = new JLabel(" "); 
    Container Cntnr = getContentPane(); 
    public void init() 
     { 
       LblGrtng.setFont(FntOne); 
       LblPrsnlGrtng.setFont(FntTwo); 
       Cntnr.add(LblGrtng); 
       Cntnr.add(TxtAns); 
       Cntnr.add(BtnClck); 
       Cntnr.setLayout(new FlowLayout()); 
       Cntnr.setBackground(Color.CYAN); 
       BtnClck.addActionListener(this); 
       TxtAns.addActionListener(this); 
     } 
       public void actionPerformed(ActionEvent ee) 
       { 
         String Nme = TxtAns.getText(); 
         Cntnr.remove(LblGrtng); 
         Cntnr.remove(BtnClck); 
         Cntnr.remove(TxtAns); 
         LblPrsnlGrtng.setText("Hello, " + Nme + "! "); 
         Cntnr.add(LblPrsnlGrtng); 
         Cntnr.setBackground(Color.WHITE); 
         validate(); 
       } 
 } 
 /*<applet code= JavaExampleHello2JApplet.class Height=300 width=240></applet>*/