MouseListener Problems - need code solution

Question

I've been banging my head against the wall the past month or so on this assignment of mine - i've come to the stage where i really some help from a person that really know the java - i have a due date coming up and i really need to output this program.
I've been thru event handling, but the majority of the code i didnt even have to look at it - im very new to java -doing it for about 6 months or less - did C so that helped a bit. But i can;t make head or tails about mousepressed,mouse pressed,mouse realsed,mouse entered and mouse exited - my code my out put is also blank...
Can somebody, anybody help me with this coding - im sorry i dont have any dukes, but i promise as soon as i get i will remember the person and give as much as he or she wants.
im gona paste my entire code assignment here...sorry for this...
This is my main class : javac ShowRubik.java and java ShowRubik
please let me know.
Regards
RAfiek
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ShowRubik extends JApplet implements MouseListener {
   Rubik cube;
   private int width = 300, height = 300;
   int count = 0;
   public void init()
     cube = new Rubik(width, height);
     cube.addMouseListener(this); 
     // get content pane and set its layout
     Container container = getContentPane();
     container.setLayout( new BorderLayout() );
     container.add(cube, BorderLayout.CENTER);
   // execute application
   public static void main( String args[] )
      int width=300, height=300;
      if (args.length !=2) {
     width = 300;
     height = 300;
      JFrame applicationWindow = new JFrame("Rubik's Cube Demo");
      applicationWindow.setDefaultCloseOperation(
         JFrame.EXIT_ON_CLOSE );
      ShowRubik appletObject = new ShowRubik();
      appletObject.setWidth(width);
      appletObject.setHeight(height);
      appletObject.init();
      appletObject.start();
      applicationWindow.getContentPane().add(appletObject);
      applicationWindow.setSize(width,height);
      applicationWindow.setVisible(true);
      applicationWindow.show();
   // enables application to specify width of drawing area
   public void setWidth( int newWidth )
      width = newWidth;
   // enables application to specify height of drawing area
   public void setHeight( int newHeight )
      height = newHeight;
// MouseListener event handlers
   // handle event when mouse released immediately after press
   public void mouseClicked( MouseEvent event )
     if (count == 0){
     cube.Turn(Rubik.LEFT);
     if (count == 1){
     cube.Turn(Rubik.RIGHT);
     if (count == 2){
     cube.Turn(Rubik.UP);
     if (count == 3){
     cube.Turn(Rubik.DOWN);
     if (count == 4){
     cube.Twist(Rubik.LEFT,0);
     if (count == 5){
     cube.Twist(Rubik.RIGHT,1);
     if (count == 6){
     cube.Twist(Rubik.UP,2);
     if (count == 7){
     cube.Twist(Rubik.DOWN,0);
     if (count == 8){
     cube.Twist(Rubik.LEFT,2);
     if (count == 9){
     cube.Twist(Rubik.RIGHT,2);
     if (count == 10){
     cube.Twist(Rubik.UP,0);
     if (count == 11){
     cube.Twist(Rubik.DOWN,1);
     if (count == 12){
     cube.Twist(Rubik.LEFT,2);
     if (count == 13){
     cube.Twist(Rubik.RIGHT,0);
     if (count == 14){
     cube.Twist(Rubik.UP,1);
     if (count == 15){
     cube.Twist(Rubik.DOWN,2);
     if (count == 16){
     cube.Reset();   
     if (count == 17){
     cube.Scramble();
     if (count == 18){
     cube.Reset();   
     count++;
   // handle event when mouse pressed
   public void mousePressed( MouseEvent event )
     repaint();
     show();
   // handle event when mouse released after dragging
   public void mouseReleased( MouseEvent event )
     cube.repaint();
   // handle event when mouse enters area
   public void mouseEntered( MouseEvent event )
     cube.repaint();
   // handle event when mouse exits area
   public void mouseExited( MouseEvent event )
     cube.repaint();
}My Rubik class
* Rubik.java
* Created on 10 May 2004, 01:50
* @author  Rafiek Buffkins
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JApplet;
import java.io.*;
import java.lang.*;
import java.util.*;
public class Rubik extends JPanel
public static int UP =0;
public static int DOWN = 1;
public static int TOP = 0;
public static int BOTTOM = 1;
public static int LEFT = 2;
public static int RIGHT = 3;
public static int BACK = 4;
public static int FRONT = 5;
private Face[] faces = new Face[6];
private Color[] colorList = new Color[] { Color.YELLOW, Color.BLUE, Color.GREEN, Color.WHITE, Color.ORANGE, Color.RED};
private int current = 0;
private int top = 4;
private int height, width;
//[6][6][4]
private int[][][] neighbors = {
               {     {-1,-1,-1,-1}, {2,0,4,5}, {-1,-1,-1,-1}, {2,0,5,4}, {2,0,1,3}, {2,0,3,1}     },
               {     {3,0,4,5}, {-1,-1,-1,-1}, {3,0,5,4}, {-1,-1,-1,-1}, {3,0,1,2}, {3,0,2,1}     },
               {     {-1,-1,-1,-1}, {0,2,5,4}, {-1,-1,-1,-1}, {0,2,4,5}, {0,3,2,1}, {0,3,1,2}     },
               {     {1,3,4,5}, {-1,-1,-1,-1}, {1,3,5,4}, {-1,-1,-1,-1}, {1,3,2,0}, {1,3,0,2}     },
               {     {5,4,1,3}, {5,4,2,0}, {5,4,3,1}, {5,4,0,2}, {-1,-1,-1,-1}, {-1,-1,-1,-1}     },
               {     {4,5,3,1}, {4,5,0,2}, {4,5,1,3}, {4,5,2,0}, {-1,-1,-1,-1}, {-1,-1,-1,-1}     },
Rubik(int w, int h)
  width = w;
    height = h;
public void Reset()
    for (int i=0; i<6; i++)
     faces[i] = new Face(i);
    current = 0;
    top = 4;
    repaint();
public void Turn(int direction)
    for (int i=0; i<3; i++)
     Twist(direction,i);
      repaint();
public void Twist(int direction, int rowOrCol)
     int front_face = current;
     int top_face = top;
     int left_face = neighbors[top][current][RIGHT];
     int right_face = neighbors[top][current][LEFT];
     int bottom_face = neighbors[top][current][UP];
             int back_face = neighbors[current][bottom_face][UP];     //trying to create and store faces into arrays and then
                                   //and then change them accordingly
     int face1, face2, face3, face4;
     if((direction==LEFT)||(direction==RIGHT))               //row twisting
          int[] rowCopy = new int[3];
          face1 = current;
          face2 = neighbors[top][face1][direction];          //trying to determine which faces are involved...
          face3 = neighbors[top][face2][direction];          //not sure....
          face4 = neighbors[top][face3][direction];
          rowCopy[0] = faces[face1].getBlocks(rowOrCol,0);     //copy face1
          rowCopy[1] = faces[face1].getBlocks(rowOrCol,1);
          rowCopy[2] = faces[face1].getBlocks(rowOrCol,2);
          for(int j = 0; j<3 ;j++)                    //twisting
            faces[face1].setBlocks(rowOrCol, j, faces[face2].getBlocks(rowOrCol,j));
          for(int j = 0; j<3; j++)
            faces[face2].setBlocks(rowOrCol, j, faces[face3].getBlocks(rowOrCol,j));
          for(int j = 0; j<3; j++)
            faces[face3].setBlocks(rowOrCol, j, faces[face4].getBlocks(rowOrCol,j));
          for(int j = 0; j<3; j++)
            faces[face4].setBlocks(rowOrCol, j, rowCopy[j]);
                                      //if twisting up :
                                   // back become reverse(top)
                                   // bottom become reverse(back)
                                   // front become bottom
                                   // top become front
     else if((direction==UP)||(direction==DOWN))          //trying column twist
       int[] colCopy = new int[3];
       int x, y, i;
     if(direction==UP)                         //twist up
       colCopy[0] = faces[front_face].getBlocks(0,rowOrCol);
       colCopy[1] = faces[front_face].getBlocks(1,rowOrCol);
       colCopy[2] = faces[front_face].getBlocks(2,rowOrCol);
     //front become bottom or bottom changes to front?
     for( i = 0; i<3; i++)
       faces[front_face].setBlocks(i, rowOrCol, faces[bottom_face].getBlocks(i, rowOrCol));
     //bottom become reverse(back)
     y = Math.abs(2 - rowOrCol);
     for( i = 0; i<3; i++)
     x = Math.abs(2-i);
       faces[bottom_face].setBlocks(i, rowOrCol, faces[back_face].getBlocks(x, y));
     //back become reverse(top)
     y = Math.abs(2 - rowOrCol);
     for( i = 0; i<3; i++)
     x = Math.abs(2-i);
       faces[back_face].setBlocks(x, y, faces[top_face].getBlocks(i, rowOrCol));
     // top become front or front become top
     for(i = 0; i<3; i++)
       faces[top_face].setBlocks(i, rowOrCol, colCopy);
                                   //when twisting down
                                   //top become reverse(back)
                                   //back become reverse(bottom)
                                   //bottom become front
                                   //front become top
     if(direction==DOWN)     
     //copy front
     for(i=0; i<3; i++)
     colCopy[i] = faces[front_face].getBlocks(i, rowOrCol);
     //front become top
     for(i = 0; i<3; i++)
     faces[front_face].setBlocks(i, rowOrCol, faces[top_face].getBlocks(i, rowOrCol));
     //top become reverse(back)
     y = Math.abs(2 - rowOrCol);
     for(i = 0; i<3; i++)
     x = Math.abs(2 - i);
     faces[top_face].setBlocks(i, rowOrCol, faces[top_face].getBlocks(x, y));
     //back become reverse(bottom)
     y = Math.abs(2 - rowOrCol);
     for(i = 0; i<3; i++)
     x = Math.abs(2 - i);
     faces[back_face].setBlocks(x, y, faces[bottom_face].getBlocks(i, rowOrCol));
     //bottom become front
     for(i = 0; i<3; i++)
     faces[bottom_face].setBlocks(i, rowOrCol, colCopy[i]);
     //if not middle row or colomn, twist the attached faces of the cube
     if(rowOrCol != 1)
     //row twisting
     //top row
     if((rowOrCol==0)&&(direction==RIGHT))
     faces[top].Rotate(Face.COUNTER);
     if((rowOrCol==0)&&(direction==LEFT))
     faces[top].Rotate(Face.CLOCK);
     //bottom row
     if((rowOrCol==2)&&(direction==RIGHT))
     faces[bottom_face].Rotate(Face.CLOCK);
     if((rowOrCol==2)&&(direction==LEFT))
     faces[bottom_face].Rotate(Face.COUNTER);
     //column twisting
     //left column
     if((rowOrCol==0)&&(direction==UP))
     faces[left_face].Rotate(Face.COUNTER);
     if((rowOrCol==0)&&(direction==DOWN))
     faces[left_face].Rotate(Face.CLOCK);
     //right column
     if((rowOrCol==2)&&(direction==UP))
     faces[right_face].Rotate(Face.CLOCK);
     if((rowOrCol==2)&&(direction==DOWN))
     faces[right_face].Rotate(Face.COUNTER);
     repaint();
}//close public void twist...
public void Scramble()
int dir, slice;
for (int i=0; i< 1000; i++)
dir = (int) (Math.random() * 4);
slice = (int) (Math.random() * 3);
Twist(dir,slice);
repaint();
     protected void paintComponent(Graphics g)
     super.paintComponent(g);
     for (int i=0; i<3; i++)
     for (int j=0; j<3; j++)
          g.setColor(getColor(faces[current].getBlocks(i,j)));
          g.fillRect(j*55,i*55,50,50);
     protected Color getColor(int index)
     return colorList[index];
     protected Face getFace(int which)
     int front_face = current;
     int top_face = top;
     int left_face = neighbors[top][current][RIGHT];
     int right_face = neighbors[top][current][LEFT];
     int bottom_face = neighbors[top][current][UP];
     int back_face = neighbors[current][bottom_face][UP];
     if (which == FRONT)
     return faces[front_face];
     else if (which == TOP)
     return faces[top_face];
     else if (which == LEFT)
     return faces[left_face];
     else if (which == RIGHT)
     return faces[right_face];
     else if (which == BOTTOM)
     return faces[bottom_face];
     else /* (which == BACK) */
     return faces[back_face];
}//close of rubik class
My face class
public class Face
  private int side;
  private int[][] blocks = new int[3][3];
  public static int CLOCK = 0;
  public static int COUNTER = 1; 
     public Face(int sideOfCube)
       side = sideOfCube;
       for(int i=0; i<3; i++)
         for(int j=0; j<3; j++)
           blocks[i][j] = sideOfCube;     //Not sure about this....
public int getBlocks(int i, int j)
   return blocks[i][j];
public int setBlocks(int i, int j, int colorNum)
     return blocks[i][j] = colorNum;
   public void Rotate(int direction)
     int[][] blocks_old = new int[3][3];
     int x, y;
     for(int i = 0; i<3; i++)
        for(int j = 0;j<3; j++)
          blocks_old[i][j] = blocks[i][j];               //blocks = old_blocks???
        }                              //or blocks_new = blocks??
     if(direction==0)
       for(int i=0; i<3; i++)
           for(int j=0; j<3; j++)
          y = i;
          x = Math.abs(2-j);
          blocks[i][j] = blocks_old[x][y];
     if(direction==1)
        for(int i = 0; i<3; i++)
           for(int j = 0; j<3; j++)
          x = j;
          y = Math.abs(2-i);
          blocks[i][j] = blocks_old[x][y];

Answer 1

What is your problem here?
What are the different methods doing:
mouseEntered(MouseEvent e) is being fired, when the mousepointer entered the current component.
mouseExited(MouseEvent e) is being fired, when the mousepointer left the current component.
mousePressed(MouseEvent e) is being fired, when the user presses any of the mousebuttons over the current component
mouseReleased(MouseEvent e) is being fired, when the user releases the pressed button and
mouseClicked(MouseEvent e) is being fired, when the user presses and releases any of the mousebuttons.
the current component in this case is the component, where the mouseListener is registered to.
Your code throws a NullPointerException, since the array faces is not initialized. "Reset" is missing in the constructor of Rubik.
when you click the mouse (press and release), the colors changes 18 times, because what is missing in mouseClicked(...) is:
       if (count == 19){
               count = 0;
       }for your example the Methods mousePressed to mouseExited are not nessessary and could be implemented empty:
     // handle event when mouse pressed
     public void mousePressed( MouseEvent event ) {}So: why are you bangig your head? What do you expect?
Michael