HELP: disabling the corresponding buttons

Question

I'm on the last step of this program. Basically what i'm having trouble with is as follows:
�     When the circle gets all the way to an edge, disable the corresponding button. When it moves back in, enable the button again.
I have put in BOLD where my errors occur. It seems to be simple placement of { } brackets but everytime I place one somewhere code is interrupted in another location.
//   CirclePanel.java
//   A panel with a circle drawn in the center and buttons on the
//   bottom that move the circle.
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class CirclePanel extends JPanel
    private final int CIRCLE_SIZE = 50;
    private int x,y;
    private Color c, r, o, bl, b;
    CirclePanel circlePanel;
    // Set up circle and buttons to move it.
    public CirclePanel(int width, int height)
    circlePanel = this;
     // Set coordinates so circle starts in middle
     x = (width/2)-(CIRCLE_SIZE/2);
     y = (height/2)-(CIRCLE_SIZE/2);
     c = Color.green;
     r = Color.red;
     o = Color.orange;
     bl = Color.black;
     b = Color.blue;
     // Need a border layout to get the buttons on the bottom
     this.setLayout(new BorderLayout());
     // Create buttons to move the circle
     JButton left = new JButton("Left");
     left.setMnemonic ('L');
     left.setToolTipText ("Moves the circle in the left direction 20 pixels");
     JButton right = new JButton("Right");
     right.setMnemonic ('R');
     right.setToolTipText ("Moves the circle in the right direction 20 pixels");
     JButton up = new JButton("Up");
     up.setMnemonic ('U');
     up.setToolTipText ("Moves the circle upward 20 pixels");
     JButton down = new JButton("Down");
     down.setMnemonic ('D');
     down.setToolTipText ("Moves the circle in the downward direction 20 pixels");
     // Add listeners to the buttons
     left.addActionListener(new MoveListener(-20,0));
     right.addActionListener(new MoveListener(20,0));
     up.addActionListener(new MoveListener(0,-20));
     down.addActionListener(new MoveListener(0,20));
     // Need a panel to put the buttons on or they'll be on
     // top of each other.
     JPanel buttonPanel = new JPanel();
     buttonPanel.add(left);
     buttonPanel.add(right);
     buttonPanel.add(up);
     buttonPanel.add(down);
     //Creates a button for each new color
     JButton red = new JButton("Red");
     JButton orange = new JButton("Orange");
     JButton black = new JButton("Black");
     JButton blue = new JButton("Blue");
     // Add listeners to the color buttons
     red.addActionListener(new ColorListener(r));
     orange.addActionListener(new ColorListener(o));
     black.addActionListener(new ColorListener(bl));
     blue.addActionListener(new ColorListener(b));
     //Adds the color buttons to the panel
     JPanel colorPanel = new JPanel();
     colorPanel.add(red);
     colorPanel.add(orange);
     colorPanel.add(black);
     colorPanel.add(blue);
     // Add the button panel to the bottom of the main panel
     this.add(buttonPanel, "South");
     this.add(colorPanel, "North");
    // Draw circle on CirclePanel
    public void paintComponent(Graphics page)
     super.paintComponent(page);
     page.setColor(c);
     page.fillOval(x,y,CIRCLE_SIZE,CIRCLE_SIZE);
    *// Class to listen for button clicks that move circle.*
    *private class MoveListener implements ActionListener*
    *private int dx;*
    *private int dy;*   <--- Syntax Error { Expected
   *     if (x > -60 )*
   *          left.setEnabled(true);*
*      if (x < -60)*
*          left.setEnabled(false);*  <--- Syntax Error } Expected
     // Parameters tell how to move circle at click.
     public MoveListener(int dx, int dy)
         this.dx = dx;
         this.dy = dy;
     // Change x and y coordinates and repaint.
     public void actionPerformed(ActionEvent e)
         x += dx;
         y += dy;
         repaint();
    // Listens for button clicks that change the circles color
    private class ColorListener implements ActionListener
         Color circleColor;
     // Constructor
     public ColorListener(Color buttonColor)
          circleColor = buttonColor;
     // Repaints the circle according to which button is pushed
     public void actionPerformed(ActionEvent e)
          c = circleColor;
         circlePanel.repaint();
}

Answer 1

I've just posted a reply in the programming forum (after you were redirected here)