我有Jbutton(由信封表示)和一个Envelope将要进行的行的ArrayList.谁能帮我？任何想法或教程将不胜感激.

解决方法:

我假设您的目标是沿着线为动画设置动画,以提供正在传输的数据动画.

对于每一行,您首先需要找到线方程.线方程的形式为y = a * x b.如果您已经在列表中已经提到了那么那就没关系了.另一方面,如果您有两个点(开始和结束位置),请使用上述等式来找到每行的a,b.

在获得线条的方程后,您可以使用动画(可能使用SwingWorker或SwingTimer)以定期增加包络的x坐标,然后使用线方程计算新的y坐标.

我希望有所帮助

更新：使用SwingTimer为演示添加了移动框的代码段

package keymovement;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.Timer;
import javax.swing.UIManager;

public class TestMovingObject {

    static class Envelope {
        double x;
        double y;

        void setPosition(double x, double y) {
            this.x = x;
            this.y = y;
        }
    }

    static class DrawArea extends JPanel {

        Envelope envelope = new Envelope();

        @Override
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            g.setColor(Color.red);
            int x = (int) Math.round(envelope.x);
            int y = (int) Math.round(envelope.y);
            g.drawRect(x, y, 20, 20);
        }

        public Envelope getEnvelope() {
            return envelope;
        }
    }

    /**
     * @param args
     */
    public static void main(String[] args) {

        SwingUtilities.invokeLater( new Runnable() {

            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }

                JFrame window = new JFrame("Moving box");
                window.setPreferredSize(new Dimension(500, 400));
                window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                final DrawArea mainArea = new DrawArea();
                window.add(mainArea);
                window.pack();

                window.setLocationRelativeTo(null);
                window.setVisible(true);

                int delay = 20; // execute every 20 milliseconds i.e. 50 times per second  

                Timer timer = new Timer(delay, new ActionListener() {
                    @Override
                    public void actionPerformed(ActionEvent e) {
                        Envelope envelope = mainArea.getEnvelope();
                        double x = envelope.x + 1;  // use smaller increments depending on the desired speed
                        double y = 0.5 * x + 2;     // moving along the line y = 0.5 * x + 2
                        envelope.setPosition(x, y);
                        mainArea.repaint();
                    }
                });
                timer.setRepeats(true);
                timer.start();

            }
        });
    }

}