java - Swing 动画开始停止

Question

这是我的第一篇文章，所以请原谅我初学者的错误。

我的程序的结构如下:

我有一个类，它基本上创建一个对象数组:

class fieldCreator extends JPanel
{
    ...
    fieldCell[] fieldArray;
    ...
    public fieldCreator()
    {
        while (counterVar < arraySize)
        {
            // fill the array randomly with one object out of three different classes
            if ((int)(Math.random()) == 0)
                this.fieldArray[counterVar] == new cellType0();
            ...
            counterVar++;
        }
    }
    public moveMethod()
    {
        // rearange the content of the array by a certain algorithm
        ...
        try 
        {
           Thread.sleep(150L); // this is to slow down the loop frequency
        }
        catch (Exception e) {}
    }
    public void paintComponent (Graphics g)
    {
        while (counterVar < arraySize)
        {
            // draw a rectangle for each object in the array in a specific color
            // create the illusion of a 2D field 
            counterVar++;
        }   
    }
}

主类创建框架并执行方法:

class Main extends JPanel 
{
    ...
    public static fieldCreator myField;
    ...
    public static void main (String[] args)
    {

        main myMain = new main();
        myField = new fieldCreator();

        main.framework();

        // !!! this loop is what i want to start/stop by a button bash !!!
        while(true)
        {
            myField.moveMethod();
            myField.repaint();
        } 
    }  
    public void frameWork()
    {
        JFrame myFrame = new JFrame();
        JButton startButton = new JButton ("Start");
        JButton stopButton = new JButton ("Stop");
        startButton.addActionListener(new startListener());
        stopButton.addActionListener(new stopListener());
        myFrame.getContentPane().add(BorderLayout.NORTH, startButton);
        myFrame.getContentPane().add(BorderLayout.CENTER, myField);
        myFrame.getContentPane().add(BorderLayout.SOUTH, stopButton);
        ...
    }

    class startListener implements ActionListener
    {
        public void actionPerformed(ActionEvent e)
        {   
            //this does not work!!!
            //while(true)
            //{
            //    myField.moveMethod();
            //    myField.repaint();
            //}
        }
    }

    class stopListener implements ActionListener
    {
        public void actionPerformed(ActionEvent e)
        {
            // ---- this needs to be implemented ----
        }
    }
}

通过 IDE 启动和停止程序，该程序可以正常工作，该字段在每个周期都会刷新并正确显示。但当涉及到实现按钮时，它根本不刷新。

我希望代码的缩短不会影响可理解性:)我感谢每一个帮助!

Answer 1

从 ActionListener 启动动画不起作用的原因是循环阻塞了 event dispatch thread 。从 main() 运行时代码似乎可以工作的原因是 main() 是在另一个线程中运行的。

对于像您一样的简单、定时重复调用，最简单的方法是使用 swing Timer .

顺便说一句，组件也应该是 created在美国东部时间。