Thread: need some help with an 2-d array project

This has to do with the game called chomp and it plays like this Java applet. The Chomp game
I need help finishing this code with 2-d arrays

// Implements a 2-D array of characters
 
public class CharMatrix
{
  // Fields:
  private int x;
  private int y;
 
  // Constructor: creates a grid with dimensions rows, cols,
  // and fills it with spaces
  public CharMatrix(int rows, int cols)
  {
  x = rows;
  y = cols;
  char[] array = new char[x][y];  
  }
 
  // Constructor: creates a grid with dimensions rows , cols ,
  // and fills it with the fill  character
  public CharMatrix(int rows, int cols, char fill)
  {
  x = rows;
  y = cols;
  char[] array = new char[x][y];  
    for(int i = 0; i < x; i++)
      for(int j = 0; j < y; j++)
        array[ i ][ j ] = fill;
  }
 
  // Returns the number of rows in grid
  public int numRows()
  {
    return x;
  }
 
  // Returns the number of columns in grid
  public int numCols()
  {
    return y;
  }
 
  // Returns the character at row, col location
  public char charAt(int row, int col)
  {
    return array[x][y];
  }
 
  // Sets the character at row, col location to ch
  public void setCharAt(int row, int col, char ch)
  {
    array[x][y] = ch;
  }
 
  // Returns true if the character at row, col is a space,
  // false otherwise
  public boolean isEmpty(int row, int col)
  {
    int counter = 0;  
    for(int i = 0; i < x; i++)
      for(int j = 0; j < y; j++)
    if (array[i][j].equals('0'))
	counter ++;
    if(counter==x*y)	
	return true;
    else return false;
  }
 
  // Fills the given rectangle with fill  characters.
  // row0, col0 is the upper left corner and row1, col1 is the
  // lower right corner of the rectangle.
  public void fillRect(int row0, int col0, int row1, int col1, char fill)
  {
    ...
  }
 
  // Fills the given rectangle with SPACE characters.
  // row0, col0 is the upper left corner and row1, col1 is the
  // lower right corner of the rectangle.
  public void clearRect(int row0, int col0, int row1, int col1)
  {
    ...
  }
 
  // Returns the count of all non-space characters in row 
  public int countInRow(int row)
  {
    ...
  }
 
  // Returns the count of all non-space characters in col 
  public int countInCol(int col)
  {
    ...
  }
}