Given the following code which has two buttons that are displayed on 
the applet, but only one is enabled at a time.(and producing the 
desired colours) Buttons are turned on or off using the setEnabled() 
method: What would I need to add to have three colours red,green,and 
blue?? 
 
******************************************************************************** 
 
import java.awt.*; 
import java.awt.event.*; 
import java.applet.*; 
 
public class But2 extends Applet implements ActionListener 
{ 
    Button butRed, butGreen; 
    Color red = Color.red; 
    Color green = Color.green; 
    Color current = red; 
 
 
    public void init() 
    { 
 butRed = new Button("Red"); 
 butRed.setEnabled(false); 
 butRed.addActionListener(this); 
 butGreen = new Button("Green"); 
 butGreen.addActionListener(this); 
 add(butRed); 
 add(butGreen); 
 current = red; 
    } 
     
    public void actionPerformed(ActionEvent e) 
    { 
 String butName = e.getActionCommand(); 
  
 if("Red".equals(butName)) 
     { 
  butRed.setEnabled(false); 
  butGreen.setEnabled(true); 
  current = red; 
     } 
 if("Green".equals(butName)) 
     { 
  butRed.setEnabled(true); 
  butGreen.setEnabled(false); 
  current = green; 
     } 
 repaint(); 
    } 
 
    public void paint(Graphics g) 
    { 
 g.setColor(current); 
 g.fillRect(100,50,200,100); 
    } 
} 
 
******************************************************************************* 
 
Thanks.

Greetings purplepit-ga!

The answer to this is fairly straight forward, but I have commented
the areas that I have added/changed from your original code:

*************BEGIN CODE********************

import java.awt.*;  
import java.awt.event.*;  
import java.applet.*;  
  
public class But2 extends Applet implements ActionListener  
{  
    Button butRed, butGreen, butBlue;  // now defining a blue button
    Color red = Color.red;  
    Color green = Color.green;  
	Color blue = Color.blue;		// storing the blue Color object
    Color current = red;			// default is still the same
  
  
    public void init()  
    {  
		 butRed = new Button("Red");  
		 butRed.setEnabled(false);  
		 butRed.addActionListener(this);  
		 butGreen = new Button("Green");  
		 butGreen.addActionListener(this); 
		 butBlue = new Button("Blue");		// declaring blue button
		 butBlue.addActionListener(this);	// adding listener to blue button
		 add(butRed);  
		 add(butGreen); 
		 add(butBlue);						// adding to applet
		 current = red;  
    }  
      
    public void actionPerformed(ActionEvent e)  
    {  
		String butName = e.getActionCommand();  
   
		if("Red".equals(butName))  
		{  
			  butRed.setEnabled(false); 
			  butBlue.setEnabled(true);		// now need to control blue button too
			  butGreen.setEnabled(true);  
			  current = red;  
		}
		else if("Green".equals(butName))  
		{  
			  butRed.setEnabled(true);  
			  butBlue.setEnabled(true);		// now need to control blue button too
			  butGreen.setEnabled(false);  
			  current = green;  
		}
		else if("Blue".equals(butName))		// added a new condition for the
blue button
		{
			butBlue.setEnabled(false);		// disable blue button when color is
blue
			butRed.setEnabled(true);		// need to enable red 
			butGreen.setEnabled(true);		// and green
			current = blue;
		}
		repaint();  
    }  
  
    public void paint(Graphics g)  
    {  
 g.setColor(current);  
 g.fillRect(100,50,200,100);  
    }  
} 

*************END CODE********************

That's all there is to it! Hopefully the formatting is still
acceptable - you never can tell until it has been posted :)

If you have any questions or concerns please do post a clarification
and I'll be happy to help out.

Cheers!

answerguru-ga

Thanks!!! Very helpful indeed!!!!

Hi again purplepit!

Just wanted to say thanks for the kind words - if you need any
programming done in the future feel free to direct the question to me
and I'd be happy to help out.

answerguru-ga

Hi answerguru.ga

Thank you too, but how do I actually direct a question to you?????

Purplepit.ga