我有2个jcomponents，动画和gardenpanel。我把它们放在jlayeredpane中，但动画类是一个始终保持运动的角色。当我在主方法中调用重绘时它非常不稳定且缓慢。所以我创建了一个名为Update的新类，它将实现runnable并启动一个只调用animation.repaint（）的新线程。但它仍然是小丑和波涛汹涌。有什么帮助吗？
public class Driver {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run(){
JFrame frame = new JFrame();
JLayeredPane pane = new JLayeredPane();
Animation animation = new Animation();
GardenPanel gPanel = new GardenPanel(6,4,600,800);
frame.setSize(800,600);
frame.add(pane);
// establish transparent background
//Color transparent = new Color(0,0,0,0);
// Initilize jcomponents
//Garden garden = new Garden(6,4);
//making jcomponents visible
animation.setSize(frame.getSize());
gPanel.setSize(frame.getSize());
animation.setOpaque(true);
pane.add(animation);
pane.add(gPanel);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
-------动画类-------
package view;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Animation extends JComponent implements MouseMotionListener, MouseListener{
final int frameCount = 10;
int picNum = 0;
BufferedImage[][] pics;
int xloc = 0;
int yloc = 0;
final int xIncr = 8;
final int yIncr = 2;
final static int frameWidth = 900;
final static int frameHeight = 600;
final static int imgWidth = 165;
final static int imgHeight = 165;
//basic info about the orc
Color c = new Color(0, 0, 0, 0);
BufferedImage seedImage;
int mouseX;
int mouseY;
int seedX = xloc+imgWidth/2;
int seedY = yloc+imgHeight/2;
int shootX;
int shootY;
boolean seedShooting = false;
boolean mouseholding;
boolean moving = false;
int power;
public enum stage {
MOVE, POWER
}
stage s;
int seedPower;
long pSeedTime;
long cSeedTime;
double seedPowerRatio = 0.75;
//Override this JPanel's paint method to cycle through picture array and draw images
public void paintComponent(Graphics g) {
super.paintComponent(g);
picNum = (picNum + 1) % frameCount;
if(mouseholding && (s == s.POWER)){
System.out.println(power++);
}
if(seedShooting){
cSeedTime = System.currentTimeMillis();
seedX = (int) ( seedPowerRatio * 1*seedPower*1.5*(cSeedTime - pSeedTime)/50 + shootX ); // calculate x-coor of seed
seedY = (int) ( seedPowerRatio * (-1)*seedPower*1.5*((int)(cSeedTime - pSeedTime))/50 + 0.5*0.02*(cSeedTime - pSeedTime)*(cSeedTime - pSeedTime)/(50^2) +shootY);
//calculate y-coor of seed
}
if(seedY>shootY+imgWidth/4){
seedShooting = false;
seedX = xloc+imgWidth/2;
seedY = yloc+imgHeight/2;
}
g.drawImage(pics[1][picNum], xloc, yloc, c, this);
g.drawImage(seedImage, seedX, seedY, imgWidth/8, imgHeight/8, this);
}
//Constructor: get image, segment and store in array
public Animation(){
seedImage = createImage(); ;
BufferedImage[] img = createAnimation();
pics = new BufferedImage[img.length][10];
for(int j = 0; j < img.length; j++){
for(int i = 0; i < frameCount; i++)
pics[j][i] = img[j].getSubimage(imgWidth*i, 0, imgWidth, imgHeight);
}
addMouseMotionListener(this);
addMouseListener(this);
Thread background = new Thread(new Background());
//background.setDaemon(true);
background.start();
}
//Read image from file and return
private BufferedImage[] createAnimation(){
BufferedImage[] bufferedImage = new BufferedImage[4];
try {
bufferedImage[0] = ImageIO.read(new File("images/orc_forward_southeast.png"));
bufferedImage[1] = ImageIO.read(new File("images/orc_forward_southwest.png"));
bufferedImage[2] = ImageIO.read(new File("images/orc_forward_northeast.png"));
bufferedImage[3] = ImageIO.read(new File("images/orc_forward_northwest.png"));
return bufferedImage;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
private BufferedImage createImage(){
BufferedImage bufferedImage;
try {
bufferedImage = ImageIO.read(new File("images/seed.png"));
return bufferedImage;
} catch (IOException e) {
e.printStackTrace();
}
return null;
// TODO: Change this method so you can load other orc animation bitmaps
}
// implement the method in mouseListener and mouseMotionListener interface
@Override
public void mouseDragged(MouseEvent event) {
mouseX = event.getX();
mouseY = event.getY();
if( ( xloc<mouseX ) && (xloc+imgWidth >mouseX) && (yloc<mouseY) && (yloc+imgHeight>mouseY) && (s==stage.MOVE) ){
//System.out.println("Imagecoor:("+xloc+", "+yloc+")"+" mousecoor:("+mouseX+","+mouseY+")");
// you can print the coordinate if you want
//xloc = mouseX-imgWidth/2;
yloc = mouseY-imgHeight/2;
seedX = xloc + imgWidth/2;
seedY = yloc + imgHeight/2;
}
} // draging the image
@Override
public void mouseMoved(MouseEvent arg0) {
}
@Override
public void mouseClicked(MouseEvent e) {
}
@Override
public void mouseEntered(MouseEvent e) {
}
@Override
public void mouseExited(MouseEvent e) {
}
// for increasing the power.
@Override
public void mousePressed(MouseEvent event) {
mouseholding = true;
mouseX = event.getX();
mouseY = event.getY();
if((xloc+imgWidth/2+1> mouseX) && (xloc-imgWidth/2-1< mouseX)&&(yloc+imgHeight/2+1 > mouseY)&&(yloc-imgHeight/2-1 < mouseY) ){
s = stage.POWER;
}
}
@Override
public void mouseReleased(MouseEvent event) {
mouseholding = false;
if(s == stage.POWER){
pSeedTime = System.currentTimeMillis();
seedPower = power;
shootX = seedX;
shootY = seedY;
seedShooting = true;
}
s = stage.MOVE;
power = 0;
}
protected class Background implements Runnable{
@Override
public void run() {
while(true){
repaint();
}
}
}
答案 0 :(得分：1)
Thread background = new Thread(new Background());
//background.setDaemon(true);
background.start();
以及您的Background()可运行代码：
protected class Background implements Runnable{
@Override
public void run() {
while(true){ <-- it is true, true and true, who is changing it?
repaint();
}
}
永远致电repaint()请求，无结束，无sleep控件。处理器中会发生多少个周期？你的处理器什么时候可以休息一下与其他计算单元交谈？