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一个星星落下

谁知我新 2022-03-17 阅读 44

首先是主类:

import javax.swing.JFrame;


public class OneStarDropJFrame extends JFrame {//jframe窗体
//一颗星落下来
	public OneStarDropJFrame(){
		this.setTitle("他妈是个傻子吧");//标题
		this.setBounds(Factory.jframeX, Factory.jframeY, Factory.jfwidth, Factory.jfheight);//边界
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置默认的关闭操作,参数”在关闭动作时退出
		this.setVisible(true);//可以开始画图了
		this.add(new OneStarDropJPramel());//jpamel图形用户界面
		this.setVisible(true);
		
		
	}
	
	public static void main(String[] args) {
		new OneStarDropJFrame();
	}
}

然后是工厂类(设置属性):

import java.awt.Toolkit;

public class Factory {

	//窗体的高宽
	public static int jfwidth=600;
	public static int jfheight=900;
	//屏幕的高宽
	public static int width=Toolkit.getDefaultToolkit().getScreenSize().width;
	public static int height=Toolkit.getDefaultToolkit().getScreenSize().height;
	//水平宽高
	public static int jframeX=width/2-jfheight/2;
	public static int jframeY=height/2-jfwidth/2;
}

最后是星星落下的,类:

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;

import javax.swing.JPanel;

public class OneStarDropJPramel extends JPanel implements Runnable {

	int y;//坐标
	Thread t;
	
	public  OneStarDropJPramel() {
		this.setBackground(Color.red);
		t = new Thread(this);//线程开始
		t.start();
	}
	@Override
	public void run() {
		while (true) {
			y++;
			if (y >= Factory.jfheight ) {
				y = 0;
			}
			repaint();//重新执行paint
			
			try {
				Thread.sleep(10);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		
	}

	@Override
	public void paint(Graphics g) {
		// TODO Auto-generated method stub
		super.paint(g);
	
		g.setColor(Color.yellow);
		g.setFont(new Font("宋体",Font.BOLD,45));
		g.drawString("*", 100, y);
		
		
	}
	
}

效果图:

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