Friday, 9 September 2016

Set Action Command For AWT Button Example

  1. /*
  2.         Set Action Command For AWT Button Example
  3.         This java example shows how to set custom action command for AWT button using
  4.         setActionCommand method of Java AWT Button class.
  5. */
  6.  
  7. import java.applet.Applet;
  8. import java.awt.Button;
  9. import java.awt.Graphics;
  10. import java.awt.event.ActionEvent;
  11. import java.awt.event.ActionListener;
  12.  
  13. /*
  14. <applet code="ButtonSetActionCommandExample" width=200 height=200>
  15. </applet>
  16. */
  17.  
  18. public class ButtonSetActionCommandExample extends Applet implements ActionListener{
  19.  
  20.         String actionMessage="";
  21.        
  22.         public void init(){
  23.                 //create Button
  24.                 Button Button1 = new Button("I agree with the terms and conditions");
  25.                                
  26.                 //add Button
  27.                 add(Button1);
  28.                                
  29.                 //set action listeners for buttons
  30.                 Button1.addActionListener(this);
  31.                
  32.                 /*
  33.                  * By default, button's action command is it's label. But in
  34.                  * some cases, labels are too long and is not appropriate to use
  35.                  * it as an action command. In such situation you would want to
  36.                  * define custom short action command for a button.
  37.                  *
  38.                  * To set custom action command for a button, use
  39.                  * void setActionCommand(String command)
  40.                  * method of AWT Button class.
  41.                  */
  42.                
  43.                 Button1.setActionCommand("Agree");
  44.         }
  45.        
  46.         public void paint(Graphics g){
  47.                 g.drawString(actionMessage,10,50);
  48.         }
  49.        
  50.         public void actionPerformed(ActionEvent ae){
  51.                
  52.                 /*
  53.                  * Get the action command using
  54.                  * String getActionCommand() method.
  55.                  */
  56.                
  57.                 String action = ae.getActionCommand();
  58.                 actionMessage = action + " button pressed!";
  59.        
  60.                 repaint();
  61.         }
  62. }
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