Thread: Java Applets - Events and Graphics

// Hi, Will someone kindly take a peek at the code below, corrrect it and let me know why this simple applet does not work.

// All I am trying to do is, as the buttons are pressed, 1000 to increment or decrement accordingly. Thank you for your time.

import java.applet.*; import java.awt.*; import javax.swing.*; import java.awt.event.*;

public class button2 extends Applet implements ActionListener{
Button increase, decrease;
int value = 1000;

public void init (){
increase = new Button("Increase the value");
add(increase);
decrease = new Button("Decrease the value");
add(decrease);
}

public void actionPerformed( ActionEvent e) {
Object obj = e.getSource( );

if (obj == increase)
value++;
if (obj == decrease)
value--;
repaint();
}

public void paint (Graphics g){
g.drawString("The value is currently " + value, 50, 80);
}
}

When I click the "Increase" button, the value of 1000 should be increased to 1001 but nothing happens. Can you please help. Thank you for your time.

import java.applet.*;  import java.awt.*;  import javax.swing.*;  import java.awt.event.*;
 
public class buttonDemo2 extends Applet implements ActionListener{
   Button increase, decrease;
   int value = 1000;
 
   public void init (){
	 increase = new Button("Increase the value");
     add(increase);
     decrease = new Button("Decrease the value");
     add(decrease);
   }
 
  public void actionPerformed( ActionEvent e) {
	Object obj = e.getSource( );
 
    if (obj == increase)
     value++;
    if (obj == decrease)
     value--;
    repaint();
   }
 
   public void paint (Graphics g){
	 g.drawString("The value is currently " + value, 50, 80);
   }
}

Norm,

How do I tie the actionPerfomed method to the Paint method.

Ashliii

Can you please see why then, the code does not respond to the actionPerfomed method and repaint. Thanks.

I am sorry, it seems println statements do not work in applets, but I have pasted the code.

[code = java]
import java.applet.*; import java.awt.*; import javax.swing.*; import java.awt.event.*;

public class buttonDemo2 extends Applet implements ActionListener{
Button increase, decrease;
int value = 1000;

public void init (){
increase = new Button("Increase the value");
add(increase);
decrease = new Button("Decrease the value");
add(decrease);
}

public void actionPerformed( ActionEvent e) {
Object obj = e.getSource( );

if (obj == increase){
value++;
}

if (obj == decrease){
value--;
}

repaint();
}

public void paint (Graphics g){
g.drawString("The value is currently " + value, 50, 80);
}
}
[/code]

Object obj = e.getSource();

if (obj == increase)
value++;

BTW, can we see an applet code with a println statment in it. Thanks.

Ok, thanks, I got it by adding the addActionListener(this); to both buttons, thank you for help and time.