[英]Java swing animation looks choppy. How to make it look pro?
更新:semicomplex动画+摇摆计时器= trainwreck。 问题的最终根源是java计时器,无论是swing还是实用程序版本。 它们不可靠,特别是在跨操作系统比较性能时。 通过实施普通的线程,程序在所有系统上运行都非常顺利。 http://zetcode.com/tutorials/javagamestutorial/animation/ 。 此外,将Toolkit.getDefaultToolkit()。sync()添加到paintComponent()方法中会有显着的帮助。
我写了一些代码,在awt.Applet中平滑动画(但是闪烁),然后我将它重构为java swing。 现在它没有闪烁,但它看起来波涛汹涌。 我搞砸了计时器,但这不起作用。 任何有关平滑动画摆动组件的提示或建议都将不胜感激。
import java.util.Random;
import java.util.ArrayList;
import java.awt.event.; import java.awt.;
import javax.swing.*;
//////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////
public class Ball extends JApplet{
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
JFrame frame = new JFrame();
frame.setTitle("And so the ball rolls");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
initContainer(frame);
frame.pack();
frame.setVisible(true);
}
});
}
public static void initContainer(Container container){
GraphicsPanel graphicsPanel = new GraphicsPanel();
MainPanel mainPanel = new MainPanel(graphicsPanel);
container.add(mainPanel);
graphicsPanel.startTimer();
}
@Override
public void init(){
initContainer(this);
}
} /////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////// class MainPanel extends JPanel { JLabel label = new JLabel("Particles"); GraphicsPanel gPanel;
public MainPanel(GraphicsPanel gPanel){
this.gPanel = gPanel;
add(gPanel);
add(label);
}
} /////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////// class GraphicsPanel extends JPanel implements MouseListener {
private ArrayList<Particle> ballArr = new ArrayList<Particle>();
private String state="s"; //"s"=spiral, "p"=particle
private int speed=10; //~20 Hz
private Timer timer;
public GraphicsPanel(){
System.out.println("echo from gpanel");
setPreferredSize(new Dimension(500,500));
timer = new Timer(speed, new TimerListener());
addMouseListener(this);
}
public void startTimer(){
timer.start();
}
@Override
public void paintComponent(Graphics g){
super.paintComponent(g);
for (Particle b: ballArr){
g.setColor(b.getColor());
g.fillOval(b.getXCoor(),b.getYCoor(),
b.getTheSize(),b.getTheSize());
}
}
public void mousePressed(MouseEvent e) {
ballArr.add(new Particle(e.getX(), e.getY(), state));
}
public void mouseReleased(MouseEvent e) {}
public void mouseEntered(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mouseClicked(MouseEvent e) {}
class TimerListener implements ActionListener {
public void actionPerformed(ActionEvent e){
for (Particle b: ballArr)
b.move();
setBackground(Color.WHITE);
repaint();
}
}
}
////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////// class Particle { private static int instanceCount; {{instanceCount++;}} private int z = 11, t=1, u=1; private int[] RGB = new int[3]; private int[] randomizeColor = new int[3]; private double radius, theta; private int x, y, centerX, centerY, size, spiralDirection=1, ballSizeLowerBound, ballSizeUpperBound, radiusLowerBound, radiusUpperBound, mouseInputX, mouseInputY, radiusXMultiplier, radiusYMultiplier; private Color color; private String state; private Random random = new Random(); /////////////////////////////////////////////////////////////////////////// public Particle(int x, int y, int centerX, int centerY, int radius, int theta, int size, Color color){ this.x=x;this.y=y;this.centerX=centerX;this.centerY=centerY; this.radius=radius;this.theta=theta;this.size=size;this.color=color; }
public Particle(int mouseInputX, int mouseInputY, String state){ this.mouseInputX=mouseInputX; this.mouseInputY=mouseInputY; this.state=state; //randomize color RGB[0] = random.nextInt(252); RGB[1] = random.nextInt(252); RGB[2] = random.nextInt(252); randomizeColor[0] = 1+random.nextInt(3); randomizeColor[0] = 1+random.nextInt(3); randomizeColor[0] = 1+random.nextInt(3); centerX=mouseInputX; centerY=mouseInputY; if (state.equals("s")){ //setup spiral state ballSizeLowerBound=5; ballSizeUpperBound=18; radiusLowerBound=0; radiusUpperBound=50; radiusXMultiplier=1; radiusYMultiplier=1; } if (state.equals("p")){ //setup particle state ballSizeLowerBound = 15; ballSizeUpperBound =20 + random.nextInt(15); radiusLowerBound = 5; radiusUpperBound = 15+ random.nextInt(34); radiusXMultiplier=1 + random.nextInt(3); radiusYMultiplier=1 + random.nextInt(3); } size = ballSizeUpperBound-1; //ball size radius = radiusUpperBound-1; if (instanceCount %2 == 0) // alternate spiral direction spiralDirection=-spiralDirection; } /////////////////////////////////////////////////////////////////////////// public int getXCoor(){return centerX+x*spiralDirection;} public int getYCoor(){return centerY+y;} public int getTheSize(){return size;} public Color getColor(){return color;} ////////////////////////////////////////////////////////////////////////// void move(){ //spiral: dr/dt changes at bounds if (radius > radiusUpperBound || radius < radiusLowerBound) u = -u; //spiral shape formula: parametric equation for the //polar equation radius = theta x = (int) (radius * radiusXMultiplier * Math.cos(theta)); y = (int) (radius * radiusYMultiplier * Math.sin(theta)); radius += .1*u; theta += .1; //ball size formula if (size == ballSizeUpperBound || size == ballSizeLowerBound) t = -t; size += t; //ball colors change for (int i = 0; i < RGB.length; i++) if (RGB[i] >= 250 || RGB[i] <= 4) randomizeColor[i] = -randomizeColor[i]; RGB[0]+= randomizeColor[0]; RGB[1]+= randomizeColor[1]; RGB[2]+= randomizeColor[2]; color = new Color(RGB[0],RGB[1],RGB[2]); }
}
不要设置恒定间隔计时器。 将计时器设置为关闭一次 - 在处理程序中
应该更顺畅。 如果你想真正的专业(并留在Java),我认为你必须考虑JavaFX。
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