java在按下按钮后尝试绘制
按下按钮后,如何使其重新喷漆?当我启动小程序时,它会在随机位置以随机的宽度和高度绘制两个矩形,按下按钮后如何让它们在不同的位置“重生”
package test;
import java.applet.Applet;
import java.awt.Button;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;
public class Main extends Applet implements ActionListener{
private static final long serialVersionUID = 1L;
Thread thread = new Thread();
boolean running = true;
Random r = new Random();
public int randX = r.nextInt(400);
public int randY = r.nextInt(400);
public int randW = r.nextInt(100);
public int randH = r.nextInt(100);
public int randX2 = r.nextInt(400);
public int randY2= r.nextInt(400);
public int randW2 = r.nextInt(100);
public int randH2 = r.nextInt(100);
public void start(){thread.start();}
public void stop(){}
public void init(){
setSize(500,500);
Button randomButton = new Button("RANDOMNESS");
randomButton.addActionListener(this);
add(randomButton);
}
public void run(){}
public void destroy(){}
public void paint(Graphics g){ //paints rect with random with and height
g.fillRect(randX, randY, randW, randH);
g.fillRect(randX2, randY2, randW2, randH2);
}
@Override
public void actionPerformed(ActionEvent e) {// How can they repaint at a different random location after pressing the button?
System.out.println("WORKING");
}
}
# 1 楼答案
你干脆换个兰迪,兰迪,。。。。在你的
actionPerformed(...)
方法中,就像你现在做的那样,给它们新的随机值,然后调用repaint()
通知小程序重新绘制自己顺便说一句,这段代码应该做什么
按照我的观点,这没什么用