fielddomino.java

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// Introduced in Chapter 2
/** A domino. */
public class FieldDomino implements Domino {

  /** The number on the left end of the Domino. */
  private int left;

  /** The number on the right end of the Domino. */
  private int right;

  /** Initialize the left and right numbers on the Domino. */
  public FieldDomino(int left, int right) {
    this.left = left;
    this.right = right;
  }

  public void flip() {
    int swap = left;
    left = right;
    right = swap;
  }
  
  public int getLeft() {
    return left;
  }

  public int getRight() {
    return right;
  }

  public String toString() {
    return left + "-" + right;
  }

  /** Create a Domino (0-6), print it, flip it, and print it again. */
  public static void main(String[] args) {
    Domino bone = new FieldDomino(0, 6);
    System.out.println(bone.getLeft() + "-" + bone.getRight());
    bone.flip();
    System.out.println(bone.getLeft() + "-" + bone.getRight());
  }

}