Keeps returning null when passing objects between private classes

At line 132, orderUp.getItem() keeps returning null. Why is the radio button not assigning a value at orderUp.setItem()?

Code:

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

public class OrderPanel extends JPanel
{
    private JRadioButton pizza, beverage, mozzSticks, breadSticks, small, medium, large;
    private JLabel totalPrice;
    private JButton order;
    
    private static int count = 0;
    private static int total = 0;
    
    public static FoodItem orderUp = new FoodItem();
    
    public OrderPanel()
    {
        
        totalPrice = new JLabel("Total ");
        
        order = new JButton("Order");
        ButtonListener buttonListen = new ButtonListener();
        order.addActionListener(buttonListen);
    
        pizza = new JRadioButton("Pizza", true);
        pizza.setBackground(Color.red);
        beverage = new JRadioButton("Beverage");
        beverage.setBackground(Color.red);
        mozzSticks = new JRadioButton("Mozzarella Sticks");
        mozzSticks.setBackground(Color.red);
        breadSticks = new JRadioButton("Breadsticks");
        breadSticks.setBackground(Color.red);
    
        ButtonGroup items = new ButtonGroup();
        items.add(pizza);
        items.add(beverage);
        items.add(mozzSticks);
        items.add(breadSticks);
        
        ItemListener itemListen = new ItemListener();
        pizza.addActionListener(itemListen);
        beverage.addActionListener(itemListen);
        mozzSticks.addActionListener(itemListen);
        breadSticks.addActionListener(itemListen);
    
        small = new JRadioButton("Small", true);
        small.setBackground(Color.red);
        medium = new JRadioButton("Medium");
        medium.setBackground(Color.red);
        large = new JRadioButton("Large");
        large.setBackground(Color.red);
        
        SizeListener sizeListen = new SizeListener();
        small.addActionListener(sizeListen);
        medium.addActionListener(sizeListen);
        large.addActionListener(sizeListen);
    
        ButtonGroup sizes = new ButtonGroup();
        sizes.add(small);
        sizes.add(medium);
        sizes.add(large);
        
        add(pizza);
        add(beverage);
        add(mozzSticks);
        add(breadSticks);
        
        add(small);
        add(medium);
        add(large);
        
        add(totalPrice);
        add(order);
        
        setBackground(Color.RED);
        setPreferredSize(new Dimension (400, 100));
        
        
    }
    
    private class ItemListener implements ActionListener
    {
        public void actionPerformed(ActionEvent event)
        {
            Object source = event.getSource();
            //orderUp.equals(orderUp);
            if (source == pizza)
            {
                orderUp.setItem("Pizza");
            }
            else if (source == beverage)
            {
                orderUp.setItem("Beverage");
            }
            else if (source == mozzSticks)
            {
                orderUp.setItem("Mozzarella Sticks");
            }
            else if (source == breadSticks)
            {
                orderUp.setItem("Breadsticks");
            }
        }
        
    }
    
    private class SizeListener implements ActionListener
    {
        public void actionPerformed(ActionEvent event)
        {
            Object source = event.getSource();
            //orderUp.equals(orderUp);
            if (source == small)
            {
                orderUp.setSize("Small");
            }
            else if (source == medium)
            {
                orderUp.setSize("Medium");
            }
            else if (source == large)
            {
                orderUp.setSize("Large");
            }
        }
    }
    
    private class ButtonListener implements ActionListener
    {
        public void actionPerformed(ActionEvent event)
        {
            int tempPrice = 0;

            if (orderUp.getItem().equals("Pizza"))
            {
                if (orderUp.getSize().equals("Small"))
                {
                    tempPrice = 7;
                }
                else if (orderUp.getSize().equals("Medium"))
                {
                    tempPrice = 10;
                }
                else if (orderUp.getSize().equals("Large"))
                {
                    tempPrice = 15;
                }
            }
            else if (orderUp.equals("Beverage"))
            {
                if (orderUp.getSize().equals("Small"))
                {
                    tempPrice = 2;
                }
                else if (orderUp.getSize().equals("Medium"))
                {
                    tempPrice = 3;
                }
                else if (orderUp.getSize().equals("Large"))
                {
                    tempPrice = 4;
                }
            }
            else if (orderUp.equals("Mozzarella Sticks"))
            {
                if (orderUp.getSize().equals("Small"))
                {
                    tempPrice = 5;
                }
                else if (orderUp.getSize().equals("Medium"))
                {
                    tempPrice = 7;
                }
                else if (orderUp.getSize().equals("Large"))
                {
                    tempPrice = 9;
                }
            }
            else if (orderUp.equals("Breadsticks"))
            {
                if (orderUp.getSize().equals("Small"))
                {
                    tempPrice = 4;
                }
                else if (orderUp.getSize().equals("Medium"))
                {
                    tempPrice = 6;
                }
                else if (orderUp.getSize().equals("Large"))
                {
                    tempPrice = 8;
                }
            }
            total += tempPrice;
            totalPrice.setText("Total: " + total);
            count++;
        }
    }
}

 

Never mind, figured it out.