等速

import java.awt.Dimension;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

import org.jdesktop.animation.timing.Animator;
import org.jdesktop.animation.timing.TimingTarget;
import org.jdesktop.animation.timing.TimingTargetAdapter;
import org.jdesktop.animation.timing.interpolation.SplineInterpolator;
import org.jdesktop.animation.timing.triggers.ActionTrigger;

public class TimingSample8 extends JPanel {
    private JLabel car1;
    private JLabel car2;
    private JLabel car3;

    private JButton button;

    private Animator animator1;
    private Animator animator2;
    private Animator animator3;

    private int IMAGE_W = 60;
    private int IMAGE_H = 40;

    public TimingSample8() {
        setLayout(null);
        
        JLabel desc1 = new JLabel("<html><h1>等速</h1></html>");
        desc1.setSize(desc1.getPreferredSize());
        desc1.setLocation(20, 50);
        add(desc1);
        JLabel desc2 = new JLabel("<html><h1>ゆっくり発進、ゆっくり停車</h1></html>");
        desc2.setSize(desc2.getPreferredSize());
        desc2.setLocation(20, 250);
        add(desc2);
        JLabel desc3 = new JLabel("<html><h1>ロケッスタート、急ブレーキ</h1></html>");
        desc3.setSize(desc3.getPreferredSize());
        desc3.setLocation(20, 450);
        add(desc3);

        car1 = new JLabel(new ImageIcon("car.gif"));
        car2 = new JLabel(new ImageIcon("car.gif"));
        car3 = new JLabel(new ImageIcon("car.gif"));
        
        button = new JButton("Start");

        car1.setBounds(20, 110, IMAGE_W, IMAGE_H);
        car2.setBounds(20, 310, IMAGE_W, IMAGE_H);
        car3.setBounds(20, 510, IMAGE_W, IMAGE_H);

        button.setBounds(700, 80, 80, 40);

        add(car1);
        add(car2);
        add(car3);

        add(button);

        setPreferredSize(new Dimension(800, 600));
        
        setAnimator();
    }


    private void setAnimator() {
        TimingTarget target1 = new TimingTargetAdapter() {
                public void timingEvent(float fraction) {
                    int x = (int)(600.0f * fraction) + 20;
                    car1.setLocation(x, 110);
                }
            };
        animator1 = new Animator(2000, target1);
        ActionTrigger trigger1 = ActionTrigger.addTrigger(button, animator1);

        TimingTarget target2 = new TimingTargetAdapter() {
                public void timingEvent(float fraction) {
                    int x = (int)(600.0f * fraction) + 20;
                    car2.setLocation(x, 310);
                }
            };
        animator2 = new Animator(2000, target2);
        animator2.setAcceleration(0.4f);
        animator2.setDeceleration(0.4f);
        ActionTrigger trigger2 = ActionTrigger.addTrigger(button, animator2);

        TimingTarget target3 = new TimingTargetAdapter() {
                public void timingEvent(float fraction) {
                    int x = (int)(600.0f * fraction) + 20;
                    car3.setLocation(x, 510);
                }
            };
        animator3 = new Animator(2000, target3);
        SplineInterpolator interpolator = new SplineInterpolator(0.0f, 0.2f, 1.0f, 0.8f);
        animator3.setInterpolator(interpolator);
        ActionTrigger trigger3 = ActionTrigger.addTrigger(button, animator3);

    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    JFrame frame = new JFrame("Timing Sample");
                    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                    frame.add(new TimingSample8());
                    frame.pack();
                    frame.setVisible(true);
                }
            });
    }
}