Square.java

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package chess;


public class Square {
 
 private Coordinate coordinate;
 private Piece piece;
 
 public Square(Coordinate c) {
 this.coordinate = c;
 this.piece = null; // No piece is positioned on this square
 }
 public Square(Coordinate c, Piece p) {
 this( c );
 this.piece = p; // A piece is positioned on this square
 }
 
 public char getColumn() { return coordinate.getColumn(); }
 public char getRow() { return coordinate.getRow(); }
 
 public int getColumnNumber() { return coordinate.getColumnNumber(); }
 public int getRowNumber() { return coordinate.getRowNumber(); }
 
 public Coordinate getCoordinate() {
 return coordinate;
 }
 public Piece getPiece() {
 return piece;
 }
 
 public boolean isOccupied() {
 return (piece != null);
 }
 
 // Returns previous piece, if the square is currently occupied.
 public Piece addPiece(Piece newPiece) {
 Piece previous = this.piece;
 this.piece = newPiece;
 return previous;
 }
 
 public Piece deletePiece() {
 Piece previous = this.piece;
 this.piece = null;
 return previous;
 } 
 
 @Override
 public String toString() {
 String p = (piece == null) ? " " : piece.toString();
 return ("Square"+coordinate.toString()+":"+p);
 }
}