练习内容
感想
//构造方法
public MyPanel(){
for(int i = 0 ; i < 300 ; i ++){
x[i] = (int)(Math.random()*1024) ;
y[i] = (int)(Math.random()*768) ;
}
}
int x[] = new int[300];
int y[] = new int[300];
附件
import java.awt.*;
public class MySnow {
public static void main(String args[]) {
Frame w = new Frame();
w.setSize(1024,768);
w.setBackground(Color.BLACK);
MyPanel mp = new MyPanel();
Thread t = new Thread(mp);
t.start();
w.add(mp);
w.show();
}
}
class MyPanel extends Panel implements Runnable{
//int x[300] = 0;
//int y[300] = 0;
int x[] = new int[300];
int y[] = new int[300];
//构造方法
public MyPanel(){
for(int i = 0 ; i < 300 ; i ++){
x[i] = (int)(Math.random()*1024) ;
y[i] = (int)(Math.random()*768) ;
}
}
public void paint(Graphics g) {
g.setColor(Color.WHITE) ;
for (int i = 0; i < 300; i++) {
g.drawString("*", x[i] , y[i]) ;
}
}
public void run() {
while(true) {
for (int i = 0;i < 300; i++) {
y[i]++;
if (y[i] > 750) {
y[i] = 0;
}
}
try {
Thread.sleep(30);
}catch(Exception e) {}
repaint();
}
}
}
