move.java

移动星空。j2se内容。适合初学者。以随机数在屏幕画星

import java.awt.* ;
public class Move {
    public static void main(String args[]) {
    	Frame w = new Frame();
      	w.setSize(1024 , 768);
    	w.setBackground(Color.BLACK);
    	  	
    	MyPanel mp = new MyPanel();
    	w.add(mp);
    	
    	w.setVisible(true);
    	
    	Thread t = new Thread(mp);
    	t.start();
    }
}
class MyPanel extends Panel implements Runnable {
	int x[] = new int[300];
	int y[] = new int[300];
	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] > 768) {
    			    y[i] = 0;
    		    }
            }
	    try {
		    Thread.sleep(10);
	    }
	    catch (Exception ex) {
	    }
	    repaint();
	    }
	}
}