java - 如何制作JFrame动画？

Question

我想知道是否有任何库或其他东西可以像 BUZZ!雅虎信使中的动画，如果没有现有的库可以做到这一点，那么可能的算法是什么？

Answer 1

您可以为您正在处理的框架创建自己的 Buzz 方法。请看下面给出的代码。

编辑根据 MadProgrammer 和 DavidKroukamp 的建议，我更改了代码以满足标准。 :)

import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.SwingUtilities;
import java.awt.BorderLayout;
import java.awt.Point;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

class BuzzFrame extends JFrame 
{
    private JButton buzz = new JButton("BUZZ ME!!");
    public BuzzFrame ()
    {
        super("BUZZ Frame!!");
    }
    public void prepareGUI()
    {
        buzz.addActionListener(new BuzzActionListener(this));
        setSize(300,200);
        getContentPane().add(buzz,BorderLayout.NORTH);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public static void main(String st[])
    {
        SwingUtilities.invokeLater ( new Runnable()
        {
            @Override
            public void run()
            {
                BuzzFrame bFrame = new BuzzFrame();
                bFrame.prepareGUI();
                bFrame.setVisible(true);
            }
        });
    }
}
class BuzzActionListener implements ActionListener
{
    private JFrame frame;
    private Point currLocation;
    private int iDisplaceXBy = 5;
    private int iDisplaceYBy = -10;
    public BuzzActionListener(JFrame frame)
    {
        this.frame = frame;
    }
    @Override
    public void actionPerformed(ActionEvent evt)
    {
        currLocation = frame.getLocationOnScreen();
        fireBuzzAction();
    }
    private void fireBuzzAction()
    {
        SwingUtilities.invokeLater ( new Runnable() 
        {
            @Override
            public void run()
            {
                Point position1 = new Point( currLocation.x + iDisplaceXBy , currLocation.y + iDisplaceYBy );
                Point position2 = new Point( currLocation.x - iDisplaceXBy , currLocation.y - iDisplaceYBy );
                for (int i = 0; i < 20 ; i++)
                {
                    frame.setLocation(position1);
                    frame.setLocation(position2);
                }
                frame.setLocation(currLocation);
            }
        });
    }
}