ハノイの塔８ (グラフィック)

Bou.java の拡張

ファイル名 Bou.java

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

public class Bou extends JPanel{ 
   static int dmax;
   char name;
   LinkedList<Integer> pile = new LinkedList<Integer>();
   
   public Bou(char nam,int maisuu) { 
      name = nam;
      while ( maisuu >0 ){
         pile.add(maisuu);
         maisuu--;
      }
   }
   public Bou(char nam) { 
      name = nam;
      pile.clear();
   }
   public String toString(){
       String x = name + ":";
       for ( int p : pile){
           x= x + p + " ";
       }
       return x;
   }
   public int rmDisk(){
      int diskn = pile.removeLast();
      
      repaint();
      return diskn;
   }
   public void addDisk(int diskn){
      pile.add(diskn);
      repaint();
   }
   public Dimension getPreferredSize() {
      return new Dimension(200,200);
   }
   public void paintComponent(Graphics myg){
      super.paintComponent(myg);
      int boux   =(int)getWidth()/2;
      int minrad =(int)(boux*0.1);
      int dr     =(int)(boux*0.8/(dmax-1));
      int bottom =(int)(getHeight()*0.9);
      int dh     =(int)(getHeight()*0.8/dmax);
      int mai = 0;
      for ( int diskn : pile ){
         mai++;
         int g =(int)(127+128/dmax*diskn);
         int b =(int)(255-255/dmax*(diskn-1));
         myg.setColor(new Color(0,g,b));
         int radius = minrad+dr*(diskn-1);
         int x = boux-radius;
         int y = bottom-dh*mai;
         myg.fillRect(x,y,radius*2,dh);
         myg.setColor(new Color(0,0,0));
         myg.drawRect(x,y,radius*2,dh);
      }
   }
}

Hanoi7.java を改良します。

ファイル名 Hanoi8.java

import java.awt.*;
import javax.swing.*;
//import java.util.*;
public class Hanoi8 { 
   long ct = 0;
   //Bou[] bou = new Bou[3];
   public void idou(int n,Bou src,Bou dst,Bou tmp){
      if (n > 0){
         idou(n-1,src,tmp,dst);
         
         int disk=src.rmDisk();
         dst.addDisk(disk);
         try {
             Thread.sleep(1000);
           }
         catch(InterruptedException ex) {
             System.err.println(ex);
           }
         ct++;
         //for(Bou b: bou) System.out.println ( b );
         //System.out.println ();
         idou(n-1,tmp,dst,src);
       }
   } 
   public Hanoi8(int maisuu){
      Bou bou1 = new Bou('A',maisuu);
      Bou bou2 = new Bou('B');
      Bou bou3 = new Bou('C');
      Bou.dmax=maisuu*2;
      JFrame  dai  = new JFrame("Hanoi");
      dai.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      dai.setLayout(new GridLayout(1,3,0,0));
      dai.add(bou1);
      dai.add(bou2);
      dai.add(bou3);
      dai.pack();
      dai.setVisible(true);
      try { Thread.sleep(1000); }
      catch(InterruptedException ex) { System.err.println(ex); }
      idou(maisuu,bou1,bou3,bou2);
   }
   public static void main( String[] args ) {
      int n = Integer.parseInt(args[0]);
      Hanoi8 hanoi = new Hanoi8(n);
      System.out.println(hanoi.ct + "回");
      System.exit(0);
   } 

}

実行結果はこうなります