用Java重新连续重绘 [英] Repainting Continuously in Java

问题描述

我有一个使用线程的Java程序。在我的run方法中，我有：

I have a Java program that uses threads. In my run method, I have:

public void run() {
    while(thread != null){
        repaint();
        System.out.println("hi");
        try {  
            Thread.sleep(1000);  
        } catch (InterruptedException e) {  
            break;  
        }  
    }
}

public void paintComponent(Graphics g) {
    // painting stuff
}

问题是执行了run方法，但 paintComponent 部分不叫。如果这不是重新绘制组件的正确方法，那么我应该如何重新绘制它？

The problem is that the run method is executed, but the paintComponent section is not called. If this is not the right way to keep repainting the component, then how should I repaint it?

推荐答案

你必须叫油漆（g）重型容器，例如JFrame。您可以将paintComponent（g）称为轻量级容器（如JButton）。看看是否有效。

You have to call paint(g) for a heavy-weight container such as a JFrame. You call paintComponent(g) for light-weight containers like a JButton. See if that works.

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