计时器应该改变每个滴答的位置,直到它到位,而不是在每个滴答,你正在运行for-next循环,这阻止了EDT直到循环结束,防止更新UI

以示例更新

例如…

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.EventQueue;

import java.awt.Point;

import java.awt.Rectangle;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.Action;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.Timer;

import javax.swing.UIManager;

import javax.swing.UnsupportedLookAndFeelException;

public class TestAnimatedPane {

public static void main(String[] args) {

new TestAnimatedPane();

}

public TestAnimatedPane() {

EventQueue.invokeLater(new Runnable() {

@Override

public void run() {

try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {

}

JFrame frame = new JFrame("Test");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setLayout(new BorderLayout());

frame.add(new TestPane());

frame.pack();

frame.setLocationRelativeTo(null);

frame.setVisible(true);

}

});

}

public class TestPane extends JPanel {

private JPanel panel;

public TestPane() {

setLayout(null);

panel = new JPanel();

panel.setBackground(Color.RED);

add(panel);

Dimension size = getPreferredSize();

Rectangle from = new Rectangle(size.width, (size.height - 50) / 2, 50, 50);

Rectangle to = new Rectangle((size.width - 50) / 2, (size.height - 50) / 2, 50, 50);

Animate animate = new Animate(panel, from, to);

animate.start();

}

@Override

public Dimension getPreferredSize() {

return new Dimension(200, 200);

}

}

public static class Animate {

public static final int RUN_TIME = 2000;

private JPanel panel;

private Rectangle from;

private Rectangle to;

private long startTime;

public Animate(JPanel panel, Rectangle from, Rectangle to) {

this.panel = panel;

this.from = from;

this.to = to;

}

public void start() {

Timer timer = new Timer(40, new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

long duration = System.currentTimeMillis() - startTime;

double progress = (double)duration / (double)RUN_TIME;

if (progress > 1f) {

progress = 1f;

((Timer)e.getSource()).stop();

}

Rectangle target = calculateProgress(from, to, progress);

panel.setBounds(target);

}

});

timer.setRepeats(true);

timer.setCoalesce(true);

timer.setInitialDelay(0);

startTime = System.currentTimeMillis();

timer.start();

}

}

public static Rectangle calculateProgress(Rectangle startBounds, Rectangle targetBounds, double progress) {

Rectangle bounds = new Rectangle();

if (startBounds != null && targetBounds != null) {

bounds.setLocation(calculateProgress(startBounds.getLocation(), targetBounds.getLocation(), progress));

bounds.setSize(calculateProgress(startBounds.getSize(), targetBounds.getSize(), progress));

}

return bounds;

}

public static Point calculateProgress(Point startPoint, Point targetPoint, double progress) {

Point point = new Point();

if (startPoint != null && targetPoint != null) {

point.x = calculateProgress(startPoint.x, targetPoint.x, progress);

point.y = calculateProgress(startPoint.y, targetPoint.y, progress);

}

return point;

}

public static int calculateProgress(int startValue, int endValue, double fraction) {

int value = 0;

int distance = endValue - startValue;

value = (int)Math.round((double)distance * fraction);

value += startValue;

return value;

}

public static Dimension calculateProgress(Dimension startSize, Dimension targetSize, double progress) {

Dimension size = new Dimension();

if (startSize != null && targetSize != null) {

size.width = calculateProgress(startSize.width, targetSize.width, progress);

size.height = calculateProgress(startSize.height, targetSize.height, progress);

}

return size;

}

}

更新

我应该在昨晚添加这个(1年不想上床,2个父母,不再说…)

动画是一个复杂的主题,尤其是当您开始查看变速时(示例是静态的).

你应该认真考虑看看…而不是重新发明轮子.

> Timing Framework – 这是基础动画框架,不会对您如何使用它做出任何假设.

> Trident – 与Timing Framework类似,但也支持基于Swing的组件(通过反射)构建

> Universal Tween Engine