How can I move a graphic ?

Question

I have two classes set up. One of them has the graphic sitting in teh center of the panel, while the other class sets up the menu and action listener things. In one of the menu items I have four options, up, down, left, and right. How can I make it so when I select one of them, it moves the graphic X number of pixels in the corresponding direction? I am having trouble with the action listener things I guess.. Any help?
Thanks.

Answer 1

import javax.swing.*;
import java.awt.*;
public class ColorPanel extends JPanel
{   private int x;
    private int y;
    ColorPanel(int vertical, int horizontal)
        setPreferredSize(new Dimension(300,300));
        setBackground(Color.white);
        x = horizontal;
        y = vertical;
    public void paintComponent (Graphics g)
        super.paintComponent(g);
        g.setColor(Color.black);
        g.drawRect(0, 0, 50, 50);
        g.drawString("Goal", 10, 30);
        g.fillOval(x, y, 10, 10);
}and
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class ColorFrame extends JFrame
{   private int x;
    private int y;
    ColorFrame()
    {   int origx=150; int origy=150;
        panel = new ColorPanel(x,y);
        getContentPane().add(panel, BorderLayout.CENTER);
        JMenuBar menuBar = new JMenuBar();
        setJMenuBar(menuBar);
        JMenu fileMenu = new JMenu("File");
        menuBar.add(fileMenu);
        fileMenu.add(createMoveItem("Up", x, y+=20));
        fileMenu.add(createMoveItem("Down", x, y-=20));  
        fileMenu.addSeparator();
        fileMenu.add(new ExitItem("Exit"));
        pack();
        setVisible(true);
    public JMenuItem createMoveItem(String label, final int x, final int y)
        JMenuItem item = new JMenuItem(label);
        class MenuItemListener implements ActionListener
            public void actionPerformed (ActionEvent evt)
                panel.repaint();
        item.addActionListener(new MenuItemListener());
        return item;
    class ExitItem extends JMenuItem implements ActionListener
        ExitItem(String label)
            setText(label);
            addActionListener(this);
        public void actionPerformed (ActionEvent evt)
            System.exit(0);
    private ColorPanel panel;
}