(1) Disk.java
package code
import java.awt.*
public class Disk extends Button {
int number//盘子的个数
public Disk(int number) {this.number = number
setBackground(Color.yellow)}
public int getNumber() {return number}}
(2) TowerPoint.java
package code
import java.awt.*
public class TowerPoint {
int x, y//塔上的点位置，即盘子的放置位置
boolean isHaveDisk//判断点上是否有盘子
Disk disk HannoiTower con
public TowerPoint(int x, int y, boolean boo) {this.x = x this.y = y isHaveDisk = boo}
public boolean getIsHaveDisk() {return isHaveDisk}
public void setIsHaveDisk(boolean boo) {isHaveDisk = boo}
public int getX() { return x } //获得点位置坐标
public int getY() { return y }
public void putDisk(Disk disk, HannoiTower con) {//在点上放盘子
this.con = concon.setLayout(null)//设置布局
this.disk = diskcon.add(disk)//加盘子到容器中
int w = disk.getBounds().width//获得盘子的长和宽 getBounds()以Rectangle对象的形式获取组件的边界
int h = disk.getBounds().height
disk.setBounds(x - w / 2, y - h / 2, w, h)//setBounds()移动组件并调整其大小，控件位置坐标，后面是宽度和高度
isHaveDisk = truecon.validate() }
public Disk getDisk() {return disk}}
(3) HannoiTower.java
package code
import javax.swing.*
import java.awt.*
public class HannoiTower extends JPanel{
TowerPoint point[]//塔上点数组
boolean move = false//判断是否移动
Disk disks[]//盘子数组
int diskNum = 0//定义盘子个数
int width, height//盘子的宽度和高度
char towerName[] = { 'A', 'B', 'C' }//塔名
TextArea infoArea
int autoNum = 1//计算步数
public HannoiTower(int number, int w, int h, char[] name, TextArea text) {towerName = namediskNum = numberwidth = wheight = h
infoArea = textsetLayout(null)
disks = new Disk[diskNum]//初始化盘子个数
//设置塔上的点属性
point = new TowerPoint[3 * diskNum]//塔上点的个数=3*盘子个数
int space = 20
for (int i = 0i <diskNumi++) {//第一根柱子上的点
point[i] = new TowerPoint(40 + width, 100 + space, false)//设置点的位置和没有盘子
space = space + height}
space = 20
for (int i = diskNumi <2 * diskNumi++) {//第二根柱子上的点
point[i] = new TowerPoint(200 + width, 100 + space, false)
space = space + height }
space = 20
for (int i = 2 * diskNumi <3 * diskNumi++){//第三根柱子上的点
point[i] = new TowerPoint(360 + width, 100 + space, false)
space = space + height }
//设置盘子属性
int tempWidth = width
int sub = (int) (tempWidth / diskNum)
for (int i = diskNum - 1i >= 0i--) {disks[i] = new Disk(i)
disks[i].setSize(tempWidth, height)//设置盘子的宽和高
tempWidth = tempWidth - sub}
for (int i = 0i <diskNumi++) {point[i].putDisk(disks[i], this)
}}
public void paint(Graphics g) {super.paint(g)
g.drawLine(point[0].getX(), point[0].getY(), point[diskNum - 1].getX(),point[diskNum - 1].getY())//画3根竖线
g.drawLine(point[diskNum].getX(), point[diskNum].getY(),
point[2 * diskNum - 1].getX(), point[2 * diskNum - 1].getY())
g.drawLine(point[2 * diskNum].getX(), point[2 * diskNum].getY(),
point[3 * diskNum - 1].getX(), point[3 * diskNum - 1].getY())
g.drawLine(point[diskNum - 1].getX() - width,
point[diskNum - 1].getY(), point[3 * diskNum - 1].getX()
+ width, point[3 * diskNum - 1].getY())
int leftx = point[diskNum - 1].getX() - width//画灰色矩形
int lefty = point[diskNum - 1].getY()
int w = (point[3 * diskNum - 1].getX() + width) - (point[diskNum - 1].getX() - width)
int h = height / 2
g.setColor(Color.gray)
g.fillRect(leftx, lefty, w, h)
g.setColor(Color.red)//画红点
int size = 4
for (int i = 0i <3 * diskNumi++) {
g.fillOval(point[i].getX() - size / 2, point[i].getY() - size / 2, size, size)}
g.drawString("" + towerName[0] + "塔", point[diskNum - 1].getX(),
point[diskNum - 1].getY() + 30)
g.drawString("" + towerName[1] + "塔", point[2 * diskNum - 1].getX(),
point[diskNum - 1].getY() + 30)
g.drawString("" + towerName[2] + "塔", point[3 * diskNum - 1].getX(),
point[diskNum - 1].getY() + 30)
g.drawString("将全部盘子从" + towerName[0] + "塔搬运到" + towerName[1] + "塔"+ towerName[2] + "塔", point[diskNum - 1].getX(),point[diskNum - 1].getY() + 80)}
/**
* 自动演示函数
*/
public void autoMoveDisk(int diskNum, char one, char two, char three) {//one塔1、two塔2、three塔3
if (diskNum == 1) //当盘子只有一个时
{infoArea.append(autoNum + ":" + one + "塔 ----->" + three + "塔\n")
autoNum++
Disk disk = getTopDisk(one)//获得塔1上最上面的盘子
int startI = getTopDiskPosition(one)//
int endI = getTopDiskUp(three)
if (disk != null) {point[endI].putDisk(disk, this)
point[startI].setIsHaveDisk(false)pause()}}
else {autoMoveDisk(diskNum - 1, one, three, two)
infoArea.append(autoNum + ":" + one + "塔 ----->" + three + "塔\n")
autoNum++
Disk disk = getTopDisk(one)
int startI = getTopDiskPosition(one)
int endI = getTopDiskUp(three)
if (disk != null) {point[endI].putDisk(disk, this)
point[startI].setIsHaveDisk(false)pause()}
autoMoveDisk(diskNum - 1, two, one, three)}}
/**
* 取最上方的盘子
*/
public Disk getTopDisk(char towerN) {//towerN塔名
Disk disk = null
if (towerN == towerName[0]) {
for (int i = 0i <diskNumi++) {
if (point[i].getIsHaveDisk() == true) {//判断是否有盘子
disk = point[i].getDisk()break}}}
if (towerN == towerName[1]) {
for (int i = diskNumi <2 * diskNumi++) {
if (point[i].getIsHaveDisk() == true) {
disk = point[i].getDisk()break}}}
if (towerN == towerName[2]) {
for (int i = 2 * diskNumi <3 * diskNumi++) {
if (point[i].getIsHaveDisk() == true) {
disk = point[i].getDisk()break}}}
return disk}
/**
* 在塔中获取盘子的放置位置
*/
public int getTopDiskUp(char towerN) {
int position = 0
if (towerN == towerName[0]) {
int i = 0
for (i = 0i <diskNumi++) {
if (point[i].getIsHaveDisk() == true) {
position = Math.max(i - 1, 0)
break}}
if (i == diskNum) {position = diskNum - 1}}
if (towerN == towerName[1]) {
int i = 0
for (i = diskNumi <2 * diskNumi++) {
if (point[i].getIsHaveDisk() == true) {
position = Math.max(i - 1, 0)break}}
if (i == 2 * diskNum) {position = 2 * diskNum - 1}}
if (towerN == towerName[2]) {int i = 0
for (i = 2 * diskNumi <3 * diskNumi++) {
if (point[i].getIsHaveDisk() == true) {
position = Math.max(i - 1, 0)break}}
if (i == 3 * diskNum) {position = 3 * diskNum - 1}}
return position}
/**
* 在塔中获取最上面盘子的位置
*/
public int getTopDiskPosition(char towerN) {
int position = 0
if (towerN == towerName[0]) {
int i = 0
for (i = 0i <diskNumi++) {
if (point[i].getIsHaveDisk() == true) {
position = ibreak}}
if (i == diskNum) {position = diskNum - 1}}
if (towerN == towerName[1]) {int i = 0
for (i = diskNumi <2 * diskNumi++) {
if (point[i].getIsHaveDisk() == true) {position = ibreak}}
if (i == 2 * diskNum) {position = 2 * diskNum - 1}}
if (towerN == towerName[2]) {int i = 0
for (i = 2 * diskNumi <3 * diskNumi++) {
if (point[i].getIsHaveDisk() == true) {
position = ibreak}}
if (i == 3 * diskNum) {position = 3 * diskNum - 1}}
return position}
public void pause() {
try {Thread.sleep(1000)// 1s移动1步} catch (InterruptedException e) {}}}
(4) Tower.java
package code
import java.awt.*
import java.awt.event.*
import javax.swing.*
public class Tower extends Frame implements ActionListener, ItemListener, Runnable {
HannoiTower tower
JButton renew, auto
Choice diskNumComBox
char towerName[] = { 'A', 'B', 'C' }
int diskNum, diskWidth, diskHeight
Thread thread
TextArea infoArea
public Tower() {
thread = new Thread(this)
diskWidth = 120diskHeight = 18
infoArea = new TextArea(15, 15)
infoArea.setText(null)
diskNumComBox = new Choice()//下拉列表
diskNumComBox.setName("diskNumComBox")//设置名字
diskNumComBox.setSize(300, 10)//设置列表大小
diskNumComBox.setFont(new java.awt.Font ("Dialog", 0, 11))//设置字体
diskNumComBox.setBackground(java.awt.Color.white)//设置下拉按钮的背景色
diskNumComBox.setForeground(java.awt.Color.black)//设置下拉按钮的前景色
for(int i=1i<=9i++){diskNumComBox.add(String.valueOf(i))}//设置盘子数目
diskNum = Integer.valueOf(diskNumComBox.getSelectedItem().toString())
tower = new HannoiTower(diskNum, diskWidth, diskHeight, towerName, infoArea)
renew = new JButton("重新开始")
auto = new JButton("自动演示")
renew.addActionListener(this)
auto.addActionListener(this)
diskNumComBox.addItemListener(this)
JPanel topPanel = new JPanel()//设置两个按钮和下拉按钮的布局，放于容器topPanel中
topPanel.add(auto, BorderLayout.WEST)
topPanel.add(renew, BorderLayout.CENTER)
topPanel.add(diskNumComBox, BorderLayout.EAST)
add(tower, BorderLayout.CENTER)//设置整体布局为边界布局
add(topPanel, BorderLayout.NORTH)
add(infoArea, BorderLayout.EAST)
addWindowListener(new WindowAdapter() {//关闭窗口时调用
public void windowClosing(WindowEvent e) {
System.exit(0)}})
setVisible(true)setBounds(40, 20, 700, 540)
validate()//是Container类中的方法，该方法用来更新容器中的布局}
public void actionPerformed(ActionEvent e) {//重置
if (e.getSource() == renew) {
if (!(thread.isAlive())) {//判断线程不活着
this.remove(tower)//Frame中的函数，重新构建，从此窗体移除指定的菜单栏。
infoArea.setText(null)
tower = new HannoiTower(diskNum, diskWidth, diskHeight, towerName, infoArea)
add(tower, BorderLayout.CENTER)
validate()}
else {}}
if (e.getSource() == auto) {//创建线程，自动演示
if (!(thread.isAlive())) {thread = new Thread(this)}
try {thread.start()} catch (Exception eee) {}}}
public void itemStateChanged(ItemEvent e) {
if (e.getSource() == diskNumComBox) {
if (!(thread.isAlive())) {
this.remove(tower)
infoArea.setText(null)
diskNum = Integer.valueOf(diskNumComBox.getSelectedItem().toString())
tower = new HannoiTower(diskNum, diskWidth, diskHeight, towerName, infoArea)
add(tower, BorderLayout.CENTER)
validate()}
else {}}}
public void run() {
this.remove(tower)
infoArea.setText(null)
tower = new HannoiTower(diskNum, diskWidth, diskHeight, towerName, infoArea)
add(tower, BorderLayout.CENTER)validate()
tower.autoMoveDisk(diskNum, towerName[0], towerName[1], towerName[2])}
public static void main(String args[]) {
new Tower()}}
import java.awt.*public class TowerPoint //公共类TowerPoint
{
int x,y//定义2个int类型的变量
boolean 有盘子//定义一个boolean类型的变量
Disk 盘子=null//初始化一个对象"盘子"并赋值为空
HannoiTower con=null//初始化一个HannoiTower类的对象"con"并赋值为空
public TowerPoint(int x,int y,boolean boo) //构造函数，有3个参数，x，y，boo
{
this.x=x//将参数赋给当前x
this.y=y//将参数赋给当前y
有盘子=boo//将boo赋给"有盘子"
}
public boolean 是否有盘子() //定义一个返回boolean类型的方法"是否有盘子"
{
return 有盘子//返回boolean类型的"有盘子"
}
public void set有盘子(boolean boo) //set方法，并且参数为boolean
{
有盘子=boo//将boo赋给有盘子
}
public int getX() //取得x方法
{
return x//返回x
}
public int getY()//取得y方法
{
return y//返回y
}
public void 放置盘子(Disk 盘子,HannoiTower con) //定义一个有2个参数的"放置盘子"方法。参数是Disk类和HannoiTower类
{
this.con=con//当前con等于参数con
con.setLayout(null)//调用on对象的方法setLayout，并设置为空
this.盘子=盘子//当前盘子等于参数盘子
con.add(盘子)//con对象的add方法，加入"盘子"对象
int w=盘子.getBounds().width//定义并给一个int类型的w变量一个值，值为"盘子.getBounds().width"
int h=盘子.getBounds().height//定义并给一个int类型的h变量一个值，值为"盘子.getBounds().height"
盘子.setBounds(x-w/2,y-h/2,w,h)//调用"盘子"对象的setBounds方法，并把传递值
有盘子=true//boolean类型的对象"有盘子"等于true
con.validate()//调用con对象的validate方法
}
public Disk 获取盘子() //定义"获取盘子"方法，方法返回Disk对象
{
return 盘子//返回盘子
}
}
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