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我原本写这篇文章的时候开始在windows上写这个，它运行的很顺利，虽然偶尔会冻结;但是，我切换到Linux后，图形非常非常波涛汹涌。我期望它以前能够工作，因为我的显卡上有合适的驱动程序，但是在切换之后，我可能会因为坏的驱动程序而导致性能下降。虽然2D游戏引擎应该可以在非常糟糕的电脑上运行。我在想，为什么它运行得如此缓慢，以及我如何能让运行速度更快。除了下面的类外，还有其他类，但下面的类包含程序的大部分主要功能。我的2dGameEngine非常滞后
package Platformer;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import javax.sound.sampled.*;
import javax.sound.sampled.LineEvent.Type;
import javax.swing.JPanel;
import javax.swing.Timer;
public abstract class GameComponent extends JPanel{
//delete this i think
public static int ticks=0;
public Rectangle box;
private final int FPS=40;
public int xMovement=0;
public int yMovement=0;
public final int A=0,D=1,S=2,W=3,SPACE=4;
public boolean[] keyPressed=new boolean[5];
private InputController keyListener;
public ArrayList<Entity> Entities=new ArrayList<Entity>();
HashMap sounds=new HashMap();
public boolean drawLines=false;
public int xAxisLines=40;
public int yAxisLines=27;
Quadtree quad=new Quadtree(0,new Rectangle(0,0,1920,1080));
public GameComponent(){
keyListener=new InputController();
box=new Rectangle(90,90,20,20);
setFocusable(true);
requestFocusInWindow(true);
run();
}
public void run(){
addKeyListener(keyListener);
Timer timer=new Timer(1000/FPS, new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
//movement();
gameLoop();
collisions();
repaint();
ticks++;
if(ticks==360 || ticks==1000){
try{
playSound("spun");
}
catch(Exception e){
e.printStackTrace();
}
}
}
});
timer.start();
}
@Override
public void paint(Graphics g){
super.paint(g);
Graphics2D g2d=(Graphics2D)g.create();
//g2d.setColor(Color.RED);
//g2d.fill(box);
for(Entity entity: Entities){
g2d.drawImage(entity.IMAGE, entity.getX(),entity.getY(), entity.IMAGE.getWidth(), entity.IMAGE.getHeight(), null);
g2d.drawString(String.valueOf(entity.NAME), entity.getX(), entity.getY());
}
///draw lines in window if enabiled
if(drawLines){
drawLines(g2d);
}
///do collisions
g2d.dispose();
}
class InputController implements KeyListener{
@Override
public void keyPressed(KeyEvent e) {
switch(e.getKeyCode()){
case KeyEvent.VK_W:
keyPressed[W]=true;
break;
case KeyEvent.VK_S:
keyPressed[S]=true;
break;
case KeyEvent.VK_A:
keyPressed[A]=true;
break;
case KeyEvent.VK_D:
keyPressed[D]=true;
break;
case KeyEvent.VK_SPACE:
keyPressed[SPACE]=true;
}
}
@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
switch(e.getKeyCode()){
case KeyEvent.VK_W:
keyPressed[W]=false;
break;
case KeyEvent.VK_S:
keyPressed[S]=false;
break;
case KeyEvent.VK_A:
keyPressed[A]=false;
break;
case KeyEvent.VK_D:
keyPressed[D]=false;
break;
case KeyEvent.VK_SPACE:
keyPressed[SPACE]=false;
}
}
@Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub
}
}
public abstract void gameLoop();
public void drawLines(Graphics2D g2d){
for(int i=0;i<1920;i+=1920/xAxisLines){
g2d.drawLine(i, 0, i, 1080);
}
for(int i=0;i<1080;i+=1080/yAxisLines){
g2d.drawLine(0, i, 1920, i);
}
}
public void collisions(){
////collisions!
ArrayList<Entity> returnEntities=new ArrayList<Entity>();
quad.clear();
for(int i=0;i<Entities.size();i++){
quad.insert(Entities.get(i));
}
for(int i=0;i <Entities.size();i++){
returnEntities.clear();
returnEntities=quad.retrieve(returnEntities,Entities.get(i));
for(Entity e:returnEntities){
//System.out.println(Entities.get(i).NAME+" could collide with "+e.NAME);
if(Math.abs(Entities.get(i).getX()-e.getX())<= Entities.get(i).IMAGE.getWidth()/2+e.IMAGE.getWidth()/2 && Math.abs(Entities.get(i).getY()-e.getY())<= Entities.get(i).IMAGE.getHeight()/2+e.IMAGE.getHeight()/2 && Entities.get(i)!=e){
//System.out.println(Entities.get(i).NAME+" is colliding with "+e.NAME);
}
}
}
////collisions!
/*
System.out.println(String.valueOf(quad.getIndex(Entities.get(0))));
System.out.println(Entities.get(0).bounds.x);
System.out.println(Entities.get(0).bounds.y);
*/
}
public void playSound(String fileName) throws IOException,
UnsupportedAudioFileException, LineUnavailableException, InterruptedException {
File clipFile=new File("assets//"+fileName+".wav");
class AudioListener implements LineListener {
private boolean done = false;
@Override public synchronized void update(LineEvent event) {
Type eventType = event.getType();
if (eventType == Type.STOP || eventType == Type.CLOSE) {
done = true;
notifyAll();
}
}
public synchronized void waitUntilDone() throws InterruptedException {
while (!done) {}
}
}
class SoundThread implements Runnable {
AudioListener listener = new AudioListener();
AudioInputStream audioInputStream;
public SoundThread() throws UnsupportedAudioFileException, IOException{
audioInputStream = AudioSystem.getAudioInputStream(clipFile);
}
@Override
public void run() {
try{
Clip clip=AudioSystem.getClip();
clip.addLineListener(listener);
clip.open(audioInputStream);
try{
clip.start();
listener.waitUntilDone();
}
finally{
clip.close();
}
}
catch(Exception e){
e.printStackTrace();
}
finally{
try {
audioInputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
Thread thread=new Thread(new SoundThread());
thread.start();
}
}
[MCVE（http://www.stackoverflow.com/help/mcve） –