华容道解析

package 华容道;

public class 华容道 {
	public static void main(String[]args) {
		new Hua_Rong_Dao();
	}

}

```java
package 华容道;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Hua_Rong_Dao extends JFrame implements MouseListener,KeyListener,ActionListener {
	Person person[]=new Person[10];
	JButton left,right,above,below;
	JButton restart=new JButton("重新开始");
	public Hua_Rong_Dao() {
		init();
		setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		setBounds(100,100,320,500);
		setVisible(true);
		validate();
	}
	public void init() {
		setLayout(null);//声明一个空布局。
		add(restart);
		restart.setBounds(100,320,120,35);
		restart.addActionListener(this);
		String name[]= {"曹操","关羽","张","刘","周","黄","兵","兵","兵","兵"};
		for(int k=0;k<name.length;k++) {
			 person[k]=new Person(k,name[k]);
			 person[k].addMouseListener(this);
			 person[k].addKeyListener(this);
			 add(person[k]);
		}
			person[0].setBounds(104,54,100,100);
			person[1].setBounds(104,154,100,50);
			person[2].setBounds(54,154,50,100);
			person[3].setBounds(204,154,50,100);
			person[4].setBounds(54,54,50,100);
			person[5].setBounds(204,54,50,100);
			person[6].setBounds(54,254,50,50);
			person[7].setBounds(204,254,50,50);
			person[8].setBounds(104,204,50,50);
			person[9].setBounds(154,204,50,50);
			person[9].requestFocus();
			left=new JButton();//设置边界。
			right=new JButton();
			above=new JButton();
			below=new JButton();
			add(left);
			add(right);
			add(above);
			add(below);
			left.setBounds(49,49,5,260);
			right.setBounds(254,49,5,260);
			above.setBounds(49,49,210,5);
			below.setBounds(49,304,210,5);
			validate();
}
	public void keyTyped(KeyEvent e) {}
	public void keyReleased(KeyEvent e) {}
	public void keyPressed(KeyEvent e) {
		Person man=(Person)e.getSource();
		if(e.getKeyCode()==KeyEvent.VK_DOWN) {
			go(man,below);
		}
		if(e.getKeyCode()==KeyEvent.VK_UP)
			go(man,above);
		if(e.getKeyCode()==KeyEvent.VK_LEFT);
			go(man,left);
		if(e.getKeyCode()==KeyEvent.VK_RIGHT)
			go(man,right);	
	}
	public void mousePressed(MouseEvent e) {
		Person man=(Person)e.getSource();
		int x=-1,y=-1;
		x=e.getX();
		y=e.getY();
		int w=man.getBounds().width;
		int h=man.getBounds().height;
		if(y>h/2)
			go(man,below);
		if(y<h/2)
			go(man,above);
		if(x<w/2)
			go(man,left);
		if(x>w/2)
			go(man,right);
		
	}
public void mouseReleased(MouseEvent e) {}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
public void mouseClicked(MouseEvent e) {}
public void go(Person man,JButton direction) {
	boolean move=true;
	Rectangle manRect=man.getBounds();//建立一个与man大小相同的矩形区域
	int x=man.getBounds().x;
	int y=man.getBounds().y;
	if(direction==below)
		y=y+50;
	else if(direction==above)
		y=y-50;
	
	else if(direction==left)
		x=x-50;
	else if(direction==right)
		x=x+50;
	manRect.setLocation(x,y);
	Rectangle directionRect=direction.getBounds();
	for(int k=0;k<10;k++) {
		Rectangle personRect=person[k].getBounds();
		if((manRect.intersects(personRect))&&(man.number!=k))//判断man是否与任意其他按钮重叠。
		
			move=false;
		}
		if(manRect.intersects(directionRect))//判断man按钮是否与边界重合。
			move=false;
		if(move==true)
			man.setLocation(x,y);
	}
	
	public void actionPerformed(ActionEvent e) {
		dispose();
		new Hua_Rong_Dao();
	}
	
	


}

```java
package 华容道;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Person extends JButton implements FocusListener{
int number;
Color c=new Color(255,245,170);
Font font=new Font("宋体",Font.BOLD,12);
Person(int number,String s){
	super(s);
	setBackground(c);
	setFont(font);
	this.number=number;//储存识别码；
	c=getBackground();//可删除。
	addFocusListener(this);
}
public void focusGained(FocusEvent e) {
	setBackground(Color.red);
	
}
public void focusLost(FocusEvent e) {
	setBackground(c);
}
}