• 汉诺塔动画


    ------多读多思,不停进取。


    翻翻数据结构,以前一直没理解这东西,最近一看就懂了。想着普林斯顿大学貌似有个将算法做成动画的课程,动手做了一下。

    总结:swing中,setVisible(true)之后获取画布。

       重写paint()方法才可画图。

         调用repaint()会闪屏,因为repaint()还会调用update(Graphics g)方法。

         直接调用update(Graphics g)方法就不闪了。

       线程可extends Thread或者implements Runnable。

    import java.awt.Color;
    import java.awt.Graphics;
    import java.awt.Graphics2D;
    import java.util.ArrayList;
    
    import javax.swing.JFrame;
    
    public class test2 extends JFrame implements Runnable{
    	/**
    	 * 
    	 */
    	private static final long serialVersionUID = 85441201828193036L;
    	Graphics2D grph;
    	//柱子中心横坐标
    	final int x1_mind=145;
    	final int x2_mind=355;
    	final int x3_mind=565;
    	//栈元素
    	Dish dish1;
    	Dish dish2;
    	Dish dish3;
    	Dish dish4;
    	//栈指针
    	int Acount=4;
    	int Bcount=0;
    	int Ccount=0;
    	ArrayList<Dish> Al_A;
    	ArrayList<Dish> Al_B;
    	ArrayList<Dish> Al_C;
    	int point[]={350,280,210,140};
    	public test2(){
    		this.setTitle("汉诺塔");
    		this.setLocation(200, 150);
    		this.setSize(700, 500);
    		this.setDefaultCloseOperation(3);
    		
    		this.setVisible(true);
    		
    		grph=(Graphics2D) this.getGraphics();
    		
    		//初始化栈
    		Al_A=new ArrayList<Dish>();
    		Al_B=new ArrayList<Dish>();
    		Al_C=new ArrayList<Dish>();
    		dish1=new Dish(x1_mind,350,100,30,Color.orange);
    		dish2=new Dish(x1_mind,280,90,30,Color.orange);
    		dish3=new Dish(x1_mind,210,80,30,Color.orange);
    		dish4=new Dish(x1_mind,140,70,30,Color.orange);
    		Al_A.add(dish1);
    		Al_A.add(dish2);
    		Al_A.add(dish3);
    		Al_A.add(dish4);
    		
    
    	}
    	public void HanioTower(int n ,char A,char B,char C)
    	{
    	
    		if(n==1)
    			MoveTo(A,C);
    		else{
    			HanioTower(n-1,A,C,B);
    			MoveTo(A,C);
    			HanioTower(n-1,B,A,C);
    		}
    		
    	}
    	public void MoveTo(char A,char C){
    		System.out.println(A+"->"+C);
    		if(A=='A' && C=='C')
    		{
    			Dish d_temp=Al_A.get(Acount-1);
    			d_temp.setCenterX(x3_mind);
    			Al_A.remove(Acount-1);
    			Acount--;
    			Al_C.add(d_temp);
    			Ccount++;
    		}else if(A=='A' && C=='B'){
    			Dish d_temp=Al_A.get(Acount-1);
    			d_temp.setCenterX(x2_mind);
    			Al_A.remove(Acount-1);
    			Acount--;
    			Al_B.add(d_temp);
    			Bcount++;
    		}else if(A=='B' && C=='C'){
    			Dish d_temp=Al_B.get(Bcount-1);
    			d_temp.setCenterX(x3_mind);
    			Al_B.remove(Bcount-1);
    			Bcount--;
    			Al_C.add(d_temp);
    			Ccount++;
    		}else if(A=='B' && C=='A'){
    			Dish d_temp=Al_B.get(Bcount-1);
    			d_temp.setCenterX(x1_mind);
    			Al_B.remove(Bcount-1);
    			Bcount--;
    			Al_A.add(d_temp);
    			Acount++;
    		}else if(A=='C' && C=='A')
    		{
    			Dish d_temp=Al_C.get(Ccount-1);
    			d_temp.setCenterX(x1_mind);
    			Al_C.remove(Ccount-1);
    			Ccount--;
    			Al_A.add(d_temp);
    			Acount++;
    		}else if(A=='C' && C=='B')
    		{
    			Dish d_temp=Al_C.get(Ccount-1);
    			d_temp.setCenterX(x2_mind);
    			Al_C.remove(Ccount-1);
    			Ccount--;
    			Al_B.add(d_temp);
    			Bcount++;
    		}
    		System.out.println("Acount="+Acount+" Bcount="+Bcount+" Ccount="+Ccount);
    		update(grph);
    
    		try {
    			Thread.sleep(300);
    		} catch (InterruptedException e) {
    			e.printStackTrace();
    		}
    	}
    	//画图方法
    	public void paint(Graphics g){
    			super.paint(g);	
    			g.setColor(Color.BLACK);
    			//中心x=145,355,565 y∈[80,400]
    			g.fillRect(140, 80, 10, 320);
    			g.fillRect(350, 80, 10, 320);
    			g.fillRect(560, 80, 10, 320);
    			
    			grph.setColor(dish1.getRectColor());
    			for(int i=0;i<Al_A.size();i++){
    				grph.fillRect(Al_A.get(i).getCenterX()-Al_A.get(i).getHalf_len(), point[i]-Al_A.get(i).getHalf_wide(), 
    						2*Al_A.get(i).getHalf_len(), 2*Al_A.get(i).getHalf_wide());
    //				System.out.println((Al_A.get(i).getCenterX()-Al_A.get(i).getHalf_len())+"    "+(point[i]-Al_A.get(i).getHalf_wide()));
    //				System.out.println((2*Al_A.get(i).getHalf_len())+"    "+(2*Al_A.get(i).getHalf_wide()));
    			}
    			for(int i=0;i<Al_B.size();i++){
    				grph.fillRect(Al_B.get(i).getCenterX()-Al_B.get(i).getHalf_len(), point[i]-Al_B.get(i).getHalf_wide(), 
    						2*Al_B.get(i).getHalf_len(), 2*Al_B.get(i).getHalf_wide());
    			}
    			for(int i=0;i<Al_C.size();i++){
    				grph.fillRect(Al_C.get(i).getCenterX()-Al_C.get(i).getHalf_len(), point[i]-Al_C.get(i).getHalf_wide(), 
    						2*Al_C.get(i).getHalf_len(), 2*Al_C.get(i).getHalf_wide());
    			}
    	}
    
    	public static void main(String[] args) {
    		test2 t=new test2();
    		Thread t1=new Thread(t);
    		t1.start();
    	
    	}
    	//线程方法
    	@Override
    	public void run() {
    
    
    		//不知道是不是画图线程和申请内存线程不大一样
    		try {
    			Thread.sleep(200);
    		} catch (InterruptedException e) {
    			e.printStackTrace();
    		}
    		
    
    		//初始化塔
    		grph.setColor(dish1.getRectColor());
    		for(int i=0;i<4;i++)
    			grph.fillRect(Al_A.get(i).getCenterX()-Al_A.get(i).getHalf_len(), Al_A.get(i).getCenterY()-Al_A.get(i).getHalf_wide(), 
    					2*Al_A.get(i).getHalf_len(), 2*Al_A.get(i).getHalf_wide());
    
    		try {
    			Thread.sleep(1500);
    		} catch (InterruptedException e) {
    			e.printStackTrace();
    		}
    		HanioTower(4, 'A', 'B', 'C');
    		
    	}
    
    }
    class Dish{
    	int centerX;
    	int centerY;
    	int half_len;
    	int half_wide;
    	Color rectColor;
    	public Color getRectColor() {
    		return rectColor;
    	}
    	public void setRectColor(Color rectColor) {
    		this.rectColor = rectColor;
    	}
    	public int getCenterX() {
    		return centerX;
    	}
    	public void setCenterX(int centerX) {
    		this.centerX = centerX;
    	}
    	public int getCenterY() {
    		return centerY;
    	}
    	public void setCenterY(int centerY) {
    		this.centerY = centerY;
    	}
    	public int getHalf_len() {
    		return half_len;
    	}
    	public void setHalf_len(int half_len) {
    		this.half_len = half_len;
    	}
    	public int getHalf_wide() {
    		return half_wide;
    	}
    	public void setHalf_wide(int half_wide) {
    		this.half_wide = half_wide;
    	}
    
    	public Dish(int x,int y,int len,int wide,Color c)
    	{
    		centerX=x;
    		centerY=y;
    		half_len=len;
    		half_wide=wide;
    		rectColor=c;
    	}
    	
    }
    

      设计思路:主要把目光放在MoveTo(char A,char C)方法上,移动之后刷新三个栈的内容,再遍历重绘。做成了一个定值,不想花时间去把参数改成活动性的了。

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  • 原文地址:https://www.cnblogs.com/chentingk/p/5644321.html
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