Java program using two classes

hi,
im new to java and to this site so it's good to meet u all
ok now with my problem, the problem is that i need to set u a add coin system which seems simple but my problem is i have to do it using 2 classes a money class which has the code and then a gui with the buton and a text box on but i dont know what to put on the gui side i think ive got the money class done
any help with this problem would be great cos ive had this problem now for a couple of days

this is my money class

Code :

---

public class Credit {
 
	private float credit;
 
	public Credit(){
		credit = 0;
		}
 
	public float addCredit(){
 
		credit = + 10;
 
		return credit;
 
	}
}

---

Hello AZBOY2000 and welcome to the Java Programming Forums :D

Its good to meet you too.

Here is an example of how to create a Swing GUI with a botton. When the button is clicked, an action is performed:

http://www.javaprogrammingforums.com...ava-swing.html

You should be able to easily modify this to suite your needs.

If you get stuck, please post back and I will assist you.

hi yeah thanks for the help but i still dont really understand it do u an example more like im trying to do if it helps here is the GUI i have at the moment

Code :

---

import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
 
import javax.swing.*;
 
 
public class VendingMachineGUI extends JFrame  implements ActionListener{
 
	private JTextArea displayArea;
	private JTextField CoinTextField;
	private JButton CoinButton, saveButton, displayAllItemsButton, findItemButton, updateButton, PurchaseButton;
	private ArrayList <Dispenser> listRecords;
	private int counter;
	private Credit c;
 
	private Dispenser vendingitems[];
 
	public static void main(String[] args)
	{
		new VendingMachineGUI();
	}
 
	public VendingMachineGUI(){
 
		setLayout(new FlowLayout());
 
		CoinTextField = new JTextField(20);
 
		CoinButton = new JButton("Add Coin");
		CoinButton.setForeground(Color.blue);
 
		saveButton = new JButton("Save Item");
		saveButton.setForeground(Color.red);
		displayAllItemsButton = new JButton("Display All Items!");
		displayAllItemsButton.setForeground(Color.blue);
		findItemButton = new JButton("Find Item ?");
		updateButton = new JButton("Update List");
		updateButton.setForeground(Color.blue);
 
		displayArea = new JTextArea();
		displayArea.setPreferredSize(new Dimension(400, 200));
		displayArea.setBackground(Color.lightGray);
 
		PurchaseButton = new JButton("Purchase Items!");
		PurchaseButton.setForeground(Color.blue);
 
		c = new Credit();
 
		add(CoinButton); add(CoinTextField); add(saveButton); add(displayAllItemsButton); add(displayArea);
		add(findItemButton); add(updateButton); add(PurchaseButton);
		saveButton.addActionListener(this); displayAllItemsButton.addActionListener(this);
		findItemButton.addActionListener(this);
		updateButton.addActionListener(this);
 
		displayAllItemsButton.setEnabled(false);
		findItemButton.setEnabled(false);
		updateButton.setEnabled(false);
 
		setTitle("*** Vending Machine ****");
		setSize(450, 500);
		setVisible(true);
 
		CoinTextField.setText("0.0");
		vendingitems = new Dispenser[8];
 
		counter =0;
 
	}
 
	public void actionPerformed(ActionEvent event){
		if (event.getSource()==CoinButton){
 
			float totalCredit = c.addCredit();}
			CoinTextField.setText(Float.toString(totalCredit ));
}
}

---

Is this your entire code? There are a few errors in the VendingMachineGUI class which are stopping me from compiling it.

sos i forgot to post my dispenser class, i havnt added this to the gui yet so i think u can take the gui as all wrong idealy i just need the add coin thing working and then i can build the dispenser in

Code :

---

import javax.swing.JOptionPane;
 
 
public class Dispencer {
 
	private String itemID;
	private String itemName; 
    private int itemPrice;  
    private int itemQuantity;
    boolean items;
 
    public Dispencer(String id, String in, int ip, int iq)
    {
    	itemID = id;
    	itemName = in;
        itemPrice  = ip;
        itemQuantity = iq;
    }
 
    public String getItemID()
    {
    	return(itemID);
    }
 
    public String getItemName()
    {
    	return(itemName);
    }
 
    public int getItemPrice()
    {
    	return(itemPrice);
    }
 
    public int getItemQuantity()
    {
    	return(itemQuantity);
    }
 
    public void replaceItemQuantity(int iq)
    {
        itemQuantity = iq;
	}
 
    public void replaceItemPrice(int ip)
    {
        itemPrice  = ip;
    }
 
    public String getItemValues()
    {
    	if (!itemID.equals(""))
    		return "Item ID: " + itemID + "Item Name: " + itemName + "  Price: " + itemPrice + " Quantity:" + itemQuantity + "\n";
    	else
    		return("");
    }
 
    public boolean itemsLeft(){
 
 
		if ((itemQuantity <1))
			items = false;
		else
			items = true;
 
		return (items);	
	}
 
    public void dispenceItem()
    {
		if (itemQuantity >0)
			itemQuantity = itemQuantity - 1;
		else
		{
			JOptionPane.showMessageDialog(null, "No items left");
		} 
	}
 
 
}

---

OK I have a version of this saved now that will compile.

I can see your GUI... What are you expecting to happen exactly? Please tell me how you would like the program to work.

well ideally id like it to vend items so select items store them in the panal with an over all amount at the side and then click a purchase button which displays items have vended and your chage is if there is any but i think i know how to solve that, im just stuck at the easy part which is were i always get stuck at, so idealy could u help me with the add coins stuff

Try updating the VendingMachineGUI class with this:

Code :

---

import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import javax.swing.*;
 
public class VendingMachineGUI extends JFrame{
 
    private JTextArea displayArea;
    private JTextField CoinTextField;
    private JButton CoinButton, saveButton, displayAllItemsButton,
            findItemButton, updateButton, PurchaseButton;
    private ArrayList<Dispenser> listRecords;
    private int counter;
    private Credit c;
 
    public float totalCredit;
 
    private Dispenser vendingitems[];
 
    public static void main(String[] args) {
        new VendingMachineGUI();
    }
 
    public VendingMachineGUI() {
 
        setLayout(new FlowLayout());
 
        CoinTextField = new JTextField(20);
 
        CoinButton = new JButton("Add Coin");
        CoinButton.setForeground(Color.blue);
 
        saveButton = new JButton("Save Item");
        saveButton.setForeground(Color.red);
        displayAllItemsButton = new JButton("Display All Items!");
        displayAllItemsButton.setForeground(Color.blue);
        findItemButton = new JButton("Find Item ?");
        updateButton = new JButton("Update List");
        updateButton.setForeground(Color.blue);
 
        displayArea = new JTextArea();
        displayArea.setPreferredSize(new Dimension(400, 200));
        displayArea.setBackground(Color.lightGray);
 
        PurchaseButton = new JButton("Purchase Items!");
        PurchaseButton.setForeground(Color.blue);
 
        c = new Credit();
 
        add(CoinButton);
        add(CoinTextField);
        add(saveButton);
        add(displayAllItemsButton);
        add(displayArea);
        add(findItemButton);
        add(updateButton);
        add(PurchaseButton);
//        saveButton.addActionListener(this);
//        displayAllItemsButton.addActionListener(this);
//        findItemButton.addActionListener(this);
//        updateButton.addActionListener(this);
 
        displayAllItemsButton.setEnabled(false);
        findItemButton.setEnabled(false);
        updateButton.setEnabled(false);
 
        setTitle("*** Vending Machine ****");
        setSize(450, 500);
        setVisible(true);
 
        CoinTextField.setText("0.0");
        vendingitems = new Dispenser[8];
 
        counter = 0;
 
 
        CoinButton.addActionListener(new ActionListener() {
 
            public void actionPerformed(ActionEvent e)
            {
                totalCredit = c.addCredit();
                //Execute when button is pressed
                //System.out.println("Coin button pressed");
                CoinTextField.setText(Float.toString(totalCredit));
            }
        });  
 
    }
 
}

---