animate.java

来自「Usefull sample codes for Java. Containt 」· Java 代码 · 共 67 行

import java.awt.*;

public class Animate extends javax.swing.JApplet
    implements Runnable {

    Image[] picture = new Image[6];
    int totalPictures = 0;
    int current = 0;
    Thread runner;
    int pause = 500;

    public void init() {
        for (int i = 0; i < 6; i++) {
            String imageText = null;
            imageText = getParameter("image"+i);
            if (imageText != null) {
                totalPictures++;
                picture[i] = getImage(getCodeBase(), imageText);
            } else {
                break;
            }
        }
        String pauseText = null;
        pauseText = getParameter("pause");
        if (pauseText != null) {
            pause = Integer.parseInt(pauseText);
        }
    }

    public void paint(Graphics screen) {
        super.paint(screen);
        Graphics2D screen2D = (Graphics2D) screen;
        if (picture[current] != null) {
            screen2D.drawImage(picture[current], 0, 0, this);
        }
    }
    
    public void start() {
        if (runner == null) {
            runner = new Thread(this);
            runner.start();
        }
    }

    public void run() {
        Thread thisThread = Thread.currentThread();
        while (runner == thisThread) {
            current++;
            if (current >= totalPictures) {
                current = 0;
            }
            repaint();
            try {
                Thread.sleep(pause);
            } catch (InterruptedException e) {
                // do nothing
            }
        }
    }

    public void stop() {
        if (runner != null) {
            runner = null;
        }
    }
}