randomshowpic.java

来自「java GUI使用实现的日历」· Java 代码 · 共 58 行

package 随机显示图片;

import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Image;

import javax.swing.JApplet;
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.Dimension;
import java.util.Random;

import javax.swing.JLabel;
import javax.swing.ImageIcon;

public class RandomShowPic extends JApplet implements Runnable {

	Container con = null;

	JPanel panel = null;

	Image img = null;

	int x, y;

	Thread t = null;

	public void start() {

		this.setSize(new Dimension(441, 471));
		img = this.getImage(getClass().getResource("/Eclipse.jpg"));
		t = new Thread(this);
		t.start();
	}

	public void run() {
		while (true) {
			Random r = new Random();
			x = r.nextInt(this.getWidth()-img.getWidth(null));
			y = r.nextInt(this.getHeight()-img.getHeight(null));
			try {
				Thread.sleep(1000);
				repaint();
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}

	public void paint(Graphics g) {
		g.clearRect(0, 0, this.getWidth(), this.getHeight());
		g.drawImage(img, x, y, null);
	}
}