hw 6/15

hw_Horse.java

package com.hw;

import java.util.Random;

public class Horse extends Thread{
    Random random = new Random();
    int speed;
    int number;
    RaceCanvas parent;
    public Horse(RaceCanvas parent,int number) {

        this.number= number;
        this.parent=parent;
        this.speed=0;
        this.random=new Random();

    }
    public void run(){
       while (this.speed<700){
            System.out.println(getName()+":"+this.speed);
            this.speed +=random.nextInt(10)+1;
            parent.repaint();
            try {
                Thread.sleep(100);
            }catch (InterruptedException e){
                e.printStackTrace();
            }
        }
        parent.finish(number);
        parent.repaint();
    }
}

hw_HorseMain.java

package com.hw;

import javax.swing.*;

    //使用 GUI (JFrame、Canvas) 設計前單元三匹馬賽跑的程式，能在最後顯示那一匹馬獲勝為佳。
    //Canvas 類別 通常用作繪圖的畫布。
public class HorseMain extends JFrame{
   public HorseMain(){
         setSize(800,400);
         RaceCanvas raceCanvas =new RaceCanvas();
         JPanel panel = new JPanel();
         JButton button = new JButton("Go!");
         panel.add(button);
         add(raceCanvas);
         setVisible(true);
         setDefaultCloseOperation(DISPOSE_ON_CLOSE);
        }
    public static void main(String[] args) { new HorseMain(); }

    }

hw_RaceCanvas.java

package com.hw;

import com.classing.Snow;

import java.awt.*;
import java.util.ArrayList;
import java.util.List;


public class RaceCanvas extends Canvas{
    List<Horse> horses = new ArrayList<Horse>();
    int winner =-1;
    public RaceCanvas(){
        for (int i =1 ; i<4 ; i++){
            Horse horse =new Horse(this,i);
            horse.start();
            horses.add(horse);
        }
    }
    public void finish(int number){
        if (winner != -1){
            return;
        }
        winner =number;
    }

    @Override
    public void paint(Graphics graphics){
        for (int i=0; i<horses.size();i++){
            Horse horse = horses.get(i);
            graphics.setColor(Color.black);
            graphics.drawString("馬",horse.speed,i*50+20);

         if (winner!= -1){
             graphics.drawString("第一名:"+winner+"號",0,300);
         }
        }
    }

}