Flappy Bird Pipes 如何在java中随机化我用于学校的程序是JGrasp

问题描述

在paint component.graphics g 中，我正在为我的飞鸟游戏创建管道，但我不知道如何制作多个随机管道。我已经将第一个随机化了，但我不知道如何制作更多并随机化那些新的。有谁知道我有什么方法可以做到这一点？

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;

public class FlappyPanel extends JPanel
{
   private static final int FRAME = 1000;
   private static final Color BACKGROUND = new Color(135,206,235);
   private static final Color GREEN = new Color(0,255,0);     
   private BufferedImage myImage;
   private Graphics myBuffer;
   private polkadot pd;
   private Timer t; 
   int top = (int)(Math.random()*1000/2);
   int bot = (int)(Math.random()*1000/2);
   int x = 1000;
   int w = 20;
   int speed = 1;
   public FlappyPanel()
   {
      myImage = new BufferedImage(400,400,1);
      myBuffer = this.myImage.getGraphics();
      pd = new polkadot(200,200,25,Color.black);
      pd.jump(400,400);
      pd.setX(75);
      pd.setY(200);
      setFocusable(true);
      t = new Timer(10,new Listener());
      t.start(); 
      addKeyListener(new Key());
      setFocusable(true);
      
    }

   public void paintComponent(Graphics g)
   {
       g.drawImage(myImage,getWidth(),getHeight(),null);
       g.setColor(GREEN);
       g.drawRect(x,w,top);
       g.drawRect(x,1000-bot,bot);
       g.fillRect(x,top);
       g.fillRect(x,bot);
       
       
   }
   

   private class Listener implements ActionListener
   {
      public void actionPerformed(ActionEvent e)
      {
          x -= speed;  
          myBuffer.setColor(BACKGROUND);
          myBuffer.fillRect(0,FRAME,FRAME);
          if(pd.getY()+1 <= 400)
          {
            pd.setY(pd.getY()+1);
          }
          pd.draw(myBuffer);
          repaint(); 
      }
   } 
   
   private class Key extends KeyAdapter
   {
      public void keypressed(KeyEvent e)
      {
         
         if(e.getKeyCode() == KeyEvent.VK_UP)//bumper2 goes up 30 pixels when UP arrow key is pressed
         {
            if(pd.getY()-1 >= 0){
            pd.setY(pd.getY()-50);//stops pd from getting out of frame
            }  
         } 
      }
   }  
}

解决方法

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