Cookie Jar Program Issues

**NoranPrease** · May 15th, 2012, 02:46 PM

I was assigned the task of creating a 'comprehensive' java program for my programming class. Task; create a program where 2 people must take from same cookie jar. The jar will start with 12 cookies in the jar. Click a button for the specific person to take a cookie and place it on their plate. It also must display person1's total, person2's total, and total left in the jar.

Keep in mind that this is only to use the most basic java skills (.awt, .swing, 2d java, etc). I was able to both draw and scenery and show a few JButtons/JTextAreas. My issue is assigning actionListeners to the buttons and getting the program functional. If anyone could help me I would be most obliged. Here is the code;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
 
public class CookieJarJPanel extends JPanel
{
 
	public void paintComponent (Graphics g)
	{
		super.paintComponent (g);
 
		Graphics2D g2d = (Graphics2D ) g;
 
		g.setColor (new Color (169, 39, 19));
		g.fillRect (0, 600, 900, 450);  //Table
 
		//Jar
		g.setColor(Color.BLACK);
		g.drawOval (325, 300, 250, 50);
		g.drawLine (325, 325, 375, 400);
		g.drawLine (575, 325, 525, 400);
		g.drawLine (375, 400, 325, 500);
		g.drawLine (525, 400, 575, 500);
		g.drawLine (325, 500, 375, 650);
		g.drawLine (575, 500, 525, 650);
		g.drawOval (375, 625, 150, 50);
		g.drawArc (375, 375, 150, 50, 0, -180);
 
		//Plates		
		g.setColor (Color.WHITE);
		g.fillOval (25, 625, 250, 100); //Left Plate
		g.fillOval (625 ,625, 250, 100); //Right Plate
 
		g.setColor (Color.BLACK);
		g.drawOval (50, 640, 200, 65);
		g.drawOval (650, 640, 200, 65);
 
		//Cookies (12)
		g.setColor (new Color(205, 133, 63));
		g.fillOval (340, 500, 50, 50);
		g.fillOval (350, 525, 50, 50);
		g.fillOval (380, 550, 50, 50);
		g.fillOval (405, 490, 50, 50);
		g.fillOval (415, 520, 50, 50);
		g.fillOval (370, 600, 50, 50);
		g.fillOval (400, 615, 50, 50);
		g.fillOval (450, 610, 50, 50);
		g.fillOval (500, 525, 50, 50);
		g.fillOval (450, 550, 50, 50);
		g.fillOval (475, 575, 50, 50);
		g.fillOval (400, 575, 50, 50);
 
 
	}
 
	ImageIcon icon1;
	JTextArea text;
	JCheckBox checkBox; 
	JComboBox number;
	Container container;
	FlowLayout layout;
 
	public CookieJarJPanel()
	{
		layout = new FlowLayout();
		setLayout(layout);
 
		JButton noranEat, johnEat;
		JTextArea noranName, johnName, noranCount, johnCount, cookieTotal;
		int noranCookieCount, johnCookieCount, cookieTotalCount;
		noranCookieCount = 12;
		johnCookieCount = 4;
		cookieTotalCount = 2;
 
		noranEat = new JButton ("Have Noran take a cookie");
		johnEat = new JButton ("Have John take a cookie");
		noranName = new JTextArea ("Noran's Amout: ");
		johnName = new JTextArea ("John's Amount: ");
		//noranCount = new JTextArea (noranCookieCount);
		//johnCount = new JTextArea (johnCookieCount);
		//cookieTotal = new JTextArea (cookieTotalCount);
 
		noranEat.setBounds (25,25, 50, 50);
		add(noranEat);
		add(noranName);
		add(johnEat);
		add(johnName);
		//add(noranCount);
		//add(johnCount);
		//add(cookieTotal);
	}
 
}

and, of course, the Main;

import java.awt.*;
import javax.swing.*;
 
public class CookieJar
{
 
	public static void main(String[] args)
		{
			JFrame frame = new JFrame ("Cookie Jar");
			frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
 
			CookieJarJPanel cookiejar = new CookieJarJPanel();
			cookiejar.setBackground (Color.cyan);
			frame.add (cookiejar);
			frame.setSize(900, 900);
			frame.setVisible(true);
		}
}

Thanks in advance!

**Norm** · May 15th, 2012, 04:19 PM

assigning actionListeners to the buttons

Can you explain the problems you are having?
Have you seen this:
How to Write an Action Listener (The Java™ Tutorials > Creating a GUI With JFC/Swing > Writing Event Listeners)

**javapenguin** · May 15th, 2012, 06:36 PM

Well, drawing it, that's something I'd like to know too, but you can alter a cookie count, if that's what you're going for, by doing something like this:

 
// Assume that there is already such fields as below declared already
 
field = new JTextField();
field.setText("5");
 
addCookie = new JButton("Add a cookie");
 
addCookie.addActionListener(new ActionListener() {
 
public void actionPerformed(ActionEvent e)
{
int cookies = Integer.parseInt(field.getText());
 
Integer added = cookies + 1;
 
field.setText(added.toString());
 
}});

Wait, you're using JTextArea, though it should still be the same as both have a setText() and getText() method.

Also, how would it know which cookie to take? Would it take from the top of the jar, from the bottom, or in the middle?

As for these three lines, I think this might have been what you were trying to do:

   noranCount = new JTextArea (Integer.toString(noranCookieCount));
 
      johnCount = new JTextArea (Integer.toString(johnCookieCount));
      cookieTotal = new JTextArea (Integer.toString(cookieTotalCount));

**Norm** · May 15th, 2012, 06:45 PM

Please format your posted code correctly with proper indentations. It should not all start in the first column.

**NoranPrease** · May 16th, 2012, 11:28 AM

Thanks for the replies, guys. Basically, it doesn't matter what cookie you take from the jar, as long as it disappears from the jar and appears on the corresponding plate. @Norm, basically my issues is I have this program setup to draw a table with two plates and a jar of 12 cookies. I don't know how to write the programming to 1) Insert buttons onto the page that say things like "Have Noran eat a cookie" and "Have John eat a cookie" AND have the buttons actually perform the command, not just sit there and look pretty. 2) How to show a JTextArea that says something like "Number of cookies left in jar: ", "Number of cookies Noran has: ", and "Number of cookies John has: ". It was suggested that I create an array for the cookies. Unfortunately, this isn't a question you can answer with a few lines of code (although that would at least point me in the right direction). In order to get this program working, it needs a decent amount of code to finish.

**Norm** · May 16th, 2012, 11:33 AM

don't know how to write the programming to 1) Insert buttons onto the page

That's very basic programming: Create a panel and add the buttons to the panel and add the panel to the frame.
Same for a text area. Add it to a panel that is showing in the frame.

One problem with the drawing in the paintComponent method is that ALL the parameters to the draw methods are hardcoded numbers vs using variables that would let you change the drawn shapes location.

My screen is 1024X600

**aussiemcgr** · May 16th, 2012, 11:38 AM

You don't need an array for this, since you are merely counting. You should have 3 ints that are accessible by the entire CookieJarJPanel class. One int will represent the number of cookies in the jar, another int will represent the number of cookies Noran has, and the last int will represent the number of cookies John has. Every time Noran takes a cookie from the jar, you decrement the number of cookies in the jar and increment the number of cookies Noran has (do the same with John). Then, each time Noran eats a cookie, you just decrement the number of cookies he has (and do the same for John).

javapenguin's post should give you an idea of how to add action listeners to your buttons. Inside the action listeners, you would do the sort of thing that I described above.

**NoranPrease** · May 16th, 2012, 01:38 PM

UPDATE: I have fixed all issues except for 1; I can't get the number of cookies to update when you click one of the buttons. Here is my updated code;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
 
public class CookieJarJPanel extends JPanel
{
 
	public void paintComponent (Graphics g)
	{
		super.paintComponent (g);
 
		Graphics2D g2d = (Graphics2D ) g;
 
		g.setColor (new Color (169, 39, 19));
		g.fillRect (0, 600, 900, 450);  //Table
 
		//Jar
		g.setColor(Color.BLACK);
		g.drawOval (325, 300, 250, 50);
		g.drawLine (325, 325, 375, 400);
		g.drawLine (575, 325, 525, 400);
		g.drawLine (375, 400, 325, 500);
		g.drawLine (525, 400, 575, 500);
		g.drawLine (325, 500, 375, 650);
		g.drawLine (575, 500, 525, 650);
		g.drawOval (375, 625, 150, 50);
		g.drawArc (375, 375, 150, 50, 0, -180);
 
		//Plates		
		g.setColor (Color.WHITE);
		g.fillOval (25, 625, 250, 100); //Left Plate
		g.fillOval (625 ,625, 250, 100); //Right Plate
 
		g.setColor (Color.BLACK);
		g.drawOval (50, 640, 200, 65);
		g.drawOval (650, 640, 200, 65);
 
		//Cookies (12)
		g.setColor (new Color(205, 133, 63));
		g.fillOval (340, 500, 50, 50);
		g.fillOval (350, 525, 50, 50);
		g.fillOval (380, 550, 50, 50);
		g.fillOval (405, 490, 50, 50);
		g.fillOval (415, 520, 50, 50);
		g.fillOval (370, 600, 50, 50);
		g.fillOval (400, 615, 50, 50);
		g.fillOval (450, 610, 50, 50);
		g.fillOval (500, 525, 50, 50);
		g.fillOval (450, 550, 50, 50);
		g.fillOval (475, 575, 50, 50);
		g.fillOval (400, 575, 50, 50);
 
 
	}
 
	ImageIcon icon1;
	JTextArea text;
	JCheckBox checkBox; 
	JComboBox number;
	Container container;
	FlowLayout layout;
 
 
	JButton noranEat, johnEat;
		JTextArea noranName, johnName, noranCount, johnCount, cookieTotal;
		double noranCookieCount = 0.0;
		double johnCookieCount = 0.0;
		double cookieTotalCount = 12.0;
 
 
	public CookieJarJPanel()
	{
		layout = new FlowLayout();
		setLayout(layout);
 
 
		noranEat = new JButton ("Have Noran take a cookie");
		johnEat = new JButton ("Have John take a cookie");
		cookieTotal = new JTextArea ("Cookies in jar: " + cookieTotalCount);
		noranName = new JTextArea ("Noran's Amout: " + noranCookieCount);
		johnName = new JTextArea ("John's Amount: " + johnCookieCount);
 
 
		noranEat.setBounds (25,25, 50, 50);
		add(noranEat);
		add(noranName);
		add(cookieTotal);
		add(johnEat);
		add(johnName);
 
		ButtonHandler handler = new ButtonHandler();
		noranEat.setActionCommand("Noran");
		noranEat.addActionListener(handler);
		johnEat.setActionCommand("John");
		johnEat.addActionListener(handler);	
 
	}
 
 
	public class ButtonHandler implements ActionListener
	{
		public void actionPerformed(ActionEvent e) 
		{
			if(e.getActionCommand()== "Noran") 
			{
				updateCount1();
 
			}else if (e.getActionCommand() == "John") 
			{
				updateCount2();
			}
		}
 
		public void updateCount1()
		{
			double newCookieAmount = 2.0;
			newCookieAmount = noranCookieCount + 1;
			noranCookieCount = newCookieAmount;
			cookieTotalCount = cookieTotalCount - 1;
		}
 
		public void updateCount2()
		{
			double newCookieAmount2 = 3.0;
			newCookieAmount2 = johnCookieCount + 1;
			johnCookieCount = newCookieAmount2;
			cookieTotalCount = cookieTotalCount - 1;
 
		}
 
	}
 
 
}

**aussiemcgr** · May 16th, 2012, 01:43 PM

You should compare Strings with the .equals method. The ActionEvent.getActionCommand() method returns a String. So, in your actionPerformed() method of your ButtonHandler, instead of saying: if(e.getActionCommand()== "Noran") , you should say: if(e.getActionCommand().equals("Noran")) .

**Norm** · May 16th, 2012, 01:47 PM

This is a lot of code to add 1 to a variable:

       double newCookieAmount2 = 3.0;
	newCookieAmount2 = johnCookieCount + 1;
	johnCookieCount = newCookieAmount2;

vs

	johnCookieCount++;  // add 1 to John's cookie count

**NoranPrease** · May 16th, 2012, 02:04 PM

Originally Posted by Norm

This is a lot of code to add 1 to a variable:

       double newCookieAmount2 = 3.0;
	newCookieAmount2 = johnCookieCount + 1;
	johnCookieCount = newCookieAmount2;

vs

	johnCookieCount++;  // add 1 to John's cookie count

Good idea, my brain is mush right now and I missed that. Thanks guys, my code is fully functional! (other than removing the cookie and placing it on the plate) :-)

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