我已经开始用 Java 编写一个小而简单的引擎（用于游戏）。当我重新粉刷屏幕时，它有时会闪烁。我查找了这个问题的答案，并建议使用摇摆计时器的答案（这就是我正在做的）。以下是相关的代码（我在一些评论中添加）：
public class Game extends JPanel implements ActionListener {
private static final long serialVersionUID = 1L;
private static Window window;
private static ObjectUpdater objects;
private static Timer timer;
private static boolean init = false;
public Game(){
timer = new Timer(30,this);
timer.start();
}
public static void main (String[] self){
new Game();
}
private static void initialize(){
//Tests
//Setting up the window
window = new Window();
//Setting up the updater
objects = new ObjectUpdater();
new Picture(Path.images+Path.img_black,10);
// These are just some objects for the game...
Entity r = new Entity(new Picture(Path.images+Path.img_lapras,0));
r.setVelocity(0.5,0);
Entity r2 = new Entity(new Picture(Path.images+Path.img_lapras,1));
Vector i = new Vector(0,0.5);
r2.setVelocity(i.values()[0],i.values()[1]);
}
// This is where repaint(); is called.
public void actionPerformed(ActionEvent e) {
setDoubleBuffered(true);
if (init == false){
initialize();
init = true;
}
objects.update(); // This updates all the game object's information
window.update(); // This updates the window itself, it's literally: repaint();
}
}
这是窗口对象的代码，因为这也是发生事情的地方。
public class Window extends JFrame{
private static final long serialVersionUID = 1L;
public static int refresh_rate = 25;
public static Picture[] image_list = new Picture[0]; // All the images I want to render
private static String win_title = "Window"; // The name of the window
private static int[] win_xy = {640,360}; // The size of the window
public Window(){
//initializes window
setTitle(win_title);
//setUndecorated(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(win_xy[0],win_xy[1]);
setLocationRelativeTo(null);
setVisible(true);
setResizable(false);
}
public static int[] getWinSize(){
return win_xy;
}
// Here I'm just "painting" everything in the image_list array...
public void paint(Graphics g) {
super.paint(g);
Graphics2D g2d = (Graphics2D) g;
for (Picture i:image_list){
g2d.drawImage(i.getPic(), i.getXY()[0], i.getXY()[1], null);
}
Toolkit.getDefaultToolkit().sync();
g.dispose();
}
public static void addPicture(Picture element){// This adds images to the image_list
Picture[] result = Arrays.copyOf(image_list, image_list.length +1);
result[image_list.length] = element;
image_list = result;
Arrays.sort(image_list);
}
public void update() {
repaint();
}
}
就是这样……谢谢！