Different between actionPerformed and mouseClicked event

[ychhuong]

I am sure about method actionPerformed in ActionEvent interface. What it is called? If I implement method actionPerformed and mouseClicked, when these methods execute?

Thanks.

[ComputerJy]

actionPerformed depends on the type of the attached item.
mouseClicked will run any time you click on the attached item

[ychhuong]

For example:
I used Button and implemented actionPerformed and mouseClicked.
When will actionPerformed and mouseClicked execute? When we click on a Button which one will execute?

[ComputerJy]

For example:
I used Button and implemented actionPerformed and mouseClicked.
When will actionPerformed and mouseClicked execute? When we click on a Button which one will execute?

Both will execute

[ychhuong]

mouseClicked will execute when a button was clicked.
How about actionPerformed? When will it execute?

[ComputerJy]

import java.io.IOException ;
import java.awt.BorderLayout ;
import java.awt.event.ActionEvent ;
import java.awt.event.ActionListener ;
import java.awt.event.MouseEvent ;
import java.awt.event.MouseListener ;
import javax.swing.JButton ;
import javax.swing.JFrame ;

public class TestClass {
  public static void main (String[] args) throws IOException {
    JFrame f = new JFrame("Welcome") ;
    JButton b = new JButton("Hi") ;
    f.getContentPane().add(b, BorderLayout.CENTER) ;
    b.addActionListener(new ActionListener() {
      /**
       * actionPerformed
       *
       * @param e ActionEvent
       */
      public void actionPerformed (ActionEvent e) {
        System.out.println("Action Performed") ;
      }
    }
    ) ;
    b.addMouseListener(new MouseListener() {
      /**
       * mouseClicked
       *
       * @param e MouseEvent
       */
      public void mouseClicked (MouseEvent e) {
        System.out.println("Mouse Clicked") ;
      }

      /**
       * mouseEntered
       *
       * @param e MouseEvent
       */
      public void mouseEntered (MouseEvent e) {
      }

      /**
       * mouseExited
       *
       * @param e MouseEvent
       */
      public void mouseExited (MouseEvent e) {
      }

      /**
       * mousePressed
       *
       * @param e MouseEvent
       */
      public void mousePressed (MouseEvent e) {
        System.out.println("Mouse Pressed") ;
      }

      /**
       * mouseReleased
       *
       * @param e MouseEvent
       */
      public void mouseReleased (MouseEvent e) {
        System.out.println("Mouse Released") ;
      }

    }
    ) ;
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE) ;
    f.setSize(300, 300) ;
    f.setVisible(true) ;
  }
}

When you execute this code and click on the button, java prints:
Mouse Pressed
Action Performed
Mouse Released
Mouse Clicked

This means, Action Performed runs before the mouse clicked

[System_Error]

I can't say this is true, but maybe it depends on the order in which you added? I mean, if you add the actionlistener first, then the actionperformed may execute first. If you add the mouselistener first, then the mouseclicked may execute first. That's just my guess, but I could very well be wrong.

[ComputerJy]

I can't say this is true, but maybe it depends on the order in which you added? I mean, if you add the actionlistener first, then the actionperformed may execute first. If you add the mouselistener first, then the mouseclicked may execute first. That's just my guess, but I could very well be wrong.

No, they won't, this is not C or C++
ActionListener and MouseListener are eventHandlers, they fire when an event occurs not according to who came first, or who is faster!