ActionEvent

ActionEvent class extends the AWTEvent class. The event is passed to every ActionListener object that registered to receive such events using the component's addActionListener method.

Methods in ActionEvent Class

String getActionCommand()

Returns the command string associated with this action

public long getWhen()

Returns the timestamp of when this event occurred.

public int getModifiers()

Returns the modifier keys held down during this action event.

public String paramString()

Returns a parameter string identifying this action event.

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
import java.text.SimpleDateFormat;
import java.util.Date;

public class ActionEventEx{
 JTextArea displayArea;
 JFrame frame1;
  
 ActionEventEx(){
  
  JButton click = new JButton("Click Me");
  JButton submit = new JButton("Submit");
  
  /* Initialize Display Area */
  displayArea = new JTextArea();
  displayArea.setEditable(false);
  JScrollPane scrollPane = new JScrollPane(displayArea);
  scrollPane.setPreferredSize(new Dimension(450, 150));
   
  /* Initialize Frame */
  frame1 =new JFrame("Sample Frame");
  frame1.pack();
  frame1.setVisible(true);
  frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  frame1.getContentPane().add(click, BorderLayout.WEST);
  frame1.getContentPane().add(submit, BorderLayout.EAST);
  frame1.getContentPane().add(scrollPane, BorderLayout.CENTER);
  frame1.setSize(800, 300);
    
  click.addActionListener(new ActionListener(){
   public void actionPerformed(ActionEvent e){
    displayArea.append("\nAction Command is "+e.getActionCommand());
    
    /* Get the Time Stamp when the Action Occurs */
    long timeStamp= e.getWhen();
    Date day = new Date(Long.parseLong(""+timeStamp));
    displayArea.append("\n time is " + day);
    
    /* Get the Modifiers */
    displayArea.append("\n Modifiers are "+e.getModifiers());
    displayArea.append("\n Entire param String is"+e.paramString()+"\n");    
   } 
  });   
  
  submit.addActionListener(new ActionListener(){
   public void actionPerformed(ActionEvent e){
    displayArea.append("\nAction Command is "+e.getActionCommand());
    
    /* Get the Time Stamp when the Action Occurs */
    long timeStamp= e.getWhen();
    Date day = new Date(Long.parseLong(""+timeStamp));
    displayArea.append("\n time is " + day);
    
    /* Get the Modifiers */
    displayArea.append("\n Modifiers are "+e.getModifiers());
    displayArea.append("\n Entire param String is"+e.paramString()+"\n"); 
   } 
  });   
 }
 
 public static void main(String args[]){
  new ActionEventEx();
 }
}

Output

Click the buttons, normally and using the combinations of keys ctrl, shift, alt and check the output.

Note

To invoke an ActionEvent on a Button using the keyboard, use the Space bar.

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