towerstackpanel.java

本软件是使用java 开发的

package datastructure;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: </p>
 * @author unascribed
 * @version 1.0
 */

import java.awt.*;
import javax.swing.*;

class TowerStackPanel
    extends JPanel {
  private Button array[];
  public static int index = 0;

  public TowerStackPanel() {
    array = new Button[45];
    setLayout(new GridLayout(10, 5, 0, 0));
    for (int i = 44; i >= 0; i--) {
      array[i] = new Button("     ");
      array[i].setBackground(new Color(221, 235, 249));
      add(array[i]);
    }

    addLabel("     N ", "Number of disks");
    addLabel("     F ", "From needle");
    addLabel("     T ", "To needle");
    addLabel("     H ", "Help needle");
    addLabel("     L ", "Return line number");

  }

  private void addLabel(String s, String s1) {
    JLabel jlabel = new JLabel(s);
    jlabel.setForeground(Color.red);
    jlabel.setToolTipText(s1);
    add(jlabel);
  }

  public void push(String s, String s1, String s2, String s3, String s4) {
    if (index > 45)
      pop();
    array[index++].setLabel(s4);
    array[index++].setLabel(s3);
    array[index++].setLabel(s2);
    array[index++].setLabel(s1);
    array[index++].setLabel(s);
  }

  public void pop() {
    if (index <= 0) {
      return;
    }
    else {
      array[--index].setLabel("     ");
      array[--index].setLabel("     ");
      array[--index].setLabel("     ");
      array[--index].setLabel("     ");
      array[--index].setLabel("     ");
      return;
    }
  }

  public void initialize(int i) {
    if (i <= 0) {
      return;
    }
    else {
      char c = (char) (i + 48);
      String s = new String("  " + c + "  ");
      push(s, " A ", "  B ", "  C ", "     ");
      return;
    }
  }

  public void clear() {
    while (index > 0)
      pop();

  }

}