gistfile1.java

import java.awt.Container; //import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.GridLayout;

import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;

public class Menu extends JApplet {

	private static final long serialVersionUID = 1L;
	private String[] drinks = { "water", "soda", "fruit juice" };
	private String[] plates = { "sushi", "pasta", "salad" };
	private String[] desserts = { "cake", "ice cream", "pastry" };

	private JTextField t = new JTextField(15);
	private JTextField t1 = new JTextField(15);
	private JTextField t2 = new JTextField(15);

	private JComboBox c = new JComboBox();
	private JComboBox c1 = new JComboBox();
	private JComboBox c2 = new JComboBox();

	private JButton b = new JButton("Add items");

	private int count = 0;
	private int count1 = 0;
	private int count2 = 0;

	public void init() {
		for (int i = 0; i < 3; i++)
			c.addItem(drinks[count++]);
		t.setEditable(false);
		b.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				if (count < drinks.length)
					c.addItem(drinks[count++]);
			}
		});
		for (int j = 0; j < 3; j++)
			c1.addItem(plates[count1++]);
		t1.setEditable(false);
		b.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				if (count < plates.length)
					c1.addItem(plates[count1++]);
			}
		});

		for (int k = 0; k < 3; k++)
			c2.addItem(desserts[count2++]);
		t2.setEditable(false);
		b.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				if (count < desserts.length)
					c2.addItem(desserts[count2++]);
			}
		});

		// link the combo boxes to the corresponding text fields
		c.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				t.setText((String) c.getSelectedItem());
			}
		});

		c1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				t1.setText((String) c1.getSelectedItem());
			}
		});
		
		c2.addActionListener(new ActionListener () {
			public void actionPerformed(ActionEvent e) {
				t2.setText((String) c2.getSelectedItem());
			}
		});
		
		// link some kind of action to pressing the button
		b.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				JFrame f = new JFrame("Alert");
				f.add(new JLabel("You said: " + c.getSelectedItem() + ", " + 
						c1.getSelectedItem() + ", " + c2.getSelectedItem()));
				f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);				
				f.setVisible(true);
				f.pack();
			}
		});

		Container cp = getContentPane();
		cp.setLayout(new GridLayout(4, 2, 5, 5));

		// lay these out in a grid (optional)
		cp.add(c);  cp.add(t);
		cp.add(c1); cp.add(t1);
		cp.add(c2); cp.add(t2);
		cp.add(b);
	}

	public static void main(String[] args) {
		run(new Menu(), 200, 125);
	}

	public static void run(JApplet applet, int width, int height) {
		JFrame frame = new JFrame();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.getContentPane().add(applet);
		frame.setSize(width, height);
		applet.init();
		applet.start();
		frame.setVisible(true);
	}
}