问题描述
我正在使用cardLayout更改视图（此类具有 JFrame 变量）。当用户点击新游戏按钮时会发生这种情况：
I'm changing "views" with cardLayout (this class has a JFrame variable). When a user clicks a new game button this happens:
public class Views extends JFrame implements ActionListener {
private JFrame frame;
private CardLayout cl;
private JPanel cards;
private Game game;
public void actionPerformed(ActionEvent e) {
String command = e.getActionCommand();
if (command.equals("New game")) {
cl.show(cards, "Game");
game.init();
this.revalidate();
this.repaint();
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
game.loop();
}
});
}
}
}
游戏的循环方法和标题class：
Game's loop method and heading of class:
public class Game extends JPanel implements KeyListener {
public void loop() {
while (player.isAlive()) {
try {
this.update();
this.repaint();
// first class JFrame variable
jframee.getFrame().repaint();
// first class JFrame variable
jframee.getFrame().revalidate();
Thread.sleep(17);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
public void update() {
System.out.println("updated");
}
}
我正在使用绘画paintComponent（）
public void paintComponent(Graphics g) {
System.out.println("paint");
...
}
实际上它并没有画任何东西。当我不调用 loop（）方法（因此它只绘制一次）所有图像都被正确绘制。但是当我调用 loop（）方法时，窗口中什么也没发生。 （即使 JFrame 上的关闭按钮也不起作用。）
Actually it's not painting anything. When I do not call loop() method (so it paints it just once) all images are painted correctly. But when I call loop() method, just nothing is happening in the window. (Even close button on JFrame doesn't work.)
如何修复？ （当我在游戏类中创建 JFrame 时，一切正常，但现在我想要更多视图，所以我需要 JFrame 在其他课程中。）
How to fix that? (When I was creating JFrame inside game class everything worked fine, but now I want to have more views so I need JFrame in other class.)
谢谢。
推荐答案
什么更新吗？您可能不应该在EDT上调用 game.loop（）。你正在EDT上运行一个循环，你的重绘不会被调用，因为重绘在EDT上排队一个事件，它似乎很忙。尝试将 game.loop（）移动到另一个线程
What does update do? You probably shouldnt call game.loop() on the EDT. You are running a loop on EDT, your repaint wont ever be invoked since repaint queues an event on EDT and it seems kind busy. Try moving game.loop() to another thread
new Thread(new Runnable() {
@override
public void run() {
game.loop();
}
}).start();
这样你就不会阻止EDT，而重绘仍然在EDT上执行。
This way you wont block the EDT while the repaint still gets to be executed on the EDT.
这篇关于Java游戏循环（绘画）冻结了我的窗口的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！