Thread: Why does my code's Fps run faster when i have a program running in background?

Well thats my question.
When i run my code in eclipse my fps are 100, but if i open for expample a google chrome windows my code's fps goes up to 500. same happens if i open for example itunes, etc.

i think its some kind of tweak. im looking forward to get this performance without any programs running in background.. so, has anyone experienced this?

first of all yes, by fps i ment frames per second.
second, well i have to main methods. One that updates the scene , the other renders it. the fps measures system, in lapses of 1 second measures how many times the method render() is called.

So, when i run my program render() is called 100 times per second. and if im still running the program and open a web-browser like google chrome , the times that render is called in a lapse of 1 seconds goes up to 500 times.

If you could post the part of code that calculates it, it's maybe something in the code.

sure, its very simple.

long unprocessedTime = 0;
int frames = 0;
long nanoPerMove = 1000000000/60;
long lastFpsTime = System.currentTimeMillis();


while(running){
long now = System.nanoTime();
long passedTime = now - lastTime;
if(passedTime > 0){
unprocessedTime+=passedTime;
while(unprocessedTime >= nanoPerMove){
move();
unprocessedTime-=nanoPerMove;
}
lastTime = now;
}
render(g);
frames++;

if(System.currentTimeMillis()-1000>=lastFpsTime){
lastFpsTime+=1000;
System.out.println("Fps = " + frames);
frames = 0;
}
}

oh gosh its not that hard to get. yes im drawing in a Swing component, its just a Canvas. G is a reference to Graphics2D indeed.

here the full code:

 
import java.awt.Canvas;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
 
 
public class MainGame extends Canvas implements Runnable{
 
	private static final long serialVersionUID = 1L;
 
	boolean running = false;
	Graphics2D g;
	BufferedImage i;
	Scene scene;
	static Mouse mouse;
	long lastTime;
 
	int counter = 0;
 
	public MainGame(){
		i = new BufferedImage(1592,966,BufferedImage.TYPE_INT_ARGB);
		g = (Graphics2D) i.getGraphics();
		scene = new Scene();
		mouse = new Mouse();
		addMouseListener(mouse);
		addMouseMotionListener(mouse);
		lastTime = System.nanoTime();
	}
 
	public void start(){
		if(running)return;
		new Thread(this).start();
		running = true;
 
	}
 
	public void stop(){
		running = false;
 
	}
 
	public void run(){
		long unprocessedTime = 0;
		int frames = 0;
		long nanoPerMove = 1000000000/60;
		long lastFpsTime = System.currentTimeMillis();
 
 
		while(running){
			long now = System.nanoTime();
			long passedTime = now - lastTime;
			if(passedTime > 0){
				unprocessedTime+=passedTime;
				while(unprocessedTime >= nanoPerMove){
					move();
					unprocessedTime-=nanoPerMove;
				}
				lastTime = now;
			}
			render(g);
			frames++;
 
			if(System.currentTimeMillis()-1000>=lastFpsTime){
				lastFpsTime+=1000;
				System.out.println("Fps = " + frames);
				frames = 0;
			}
 
			Graphics2D g2 = (Graphics2D)getGraphics();
			g2.drawImage(i, 0, 0, 1592,966, null);
			g2.dispose();
			try{
				Thread.sleep(1);
			}catch (InterruptedException e){
 
			}
		}
	}
 
	public void move(){
		scene.move();
	}
 
	public void render(Graphics2D g){
		scene.render(g);
	}
 
}

How do i use the EDT to paint within this example? can you give me a hint?

the rest is just some silly drawing g.fillPolygon(x[],y[],n);

import java.awt.Dimension;
import javax.swing.JFrame;
 
 
public class Start {
 
	public static final int W = 1592;
	public static final int H = 966;
	public static final int X = W/2;
	public static final int Y = H/2;
 
	public static void main(String[] args){
		MainGame game = new MainGame();
		JFrame frame = new JFrame("Game Name");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setLocationRelativeTo(null);
		frame.setLocation(frame.getX()-X,frame.getY()-Y);
		frame.setMaximumSize(new Dimension (W,H));
		frame.setMinimumSize(new Dimension (W,H));
		frame.setUndecorated(false);
		frame.setVisible(true);
		frame.add(game);
		frame.pack();
		game.start();
		System.out.println("Started");
	}
}

import java.awt.Canvas;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
 
 
public class MainGame extends Canvas implements Runnable{
 
	private static final long serialVersionUID = 1L;
 
	boolean running = false;
	Graphics2D g;
	BufferedImage i;
	Scene scene;
	static Mouse mouse;
	long lastTime;
 
	int counter = 0;
 
	public MainGame(){
		i = new BufferedImage(1592,966,BufferedImage.TYPE_INT_ARGB);
		g = (Graphics2D) i.getGraphics();
		scene = new Scene();
		mouse = new Mouse();
		addMouseListener(mouse);
		addMouseMotionListener(mouse);
		lastTime = System.nanoTime();
	}
 
	public void start(){
		if(running)return;
		new Thread(this).start();
		running = true;
 
	}
 
	public void stop(){
		running = false;
 
	}
 
	public void run(){
		long unprocessedTime = 0;
		int frames = 0;
		long nanoPerMove = 1000000000/60;
		long lastFpsTime = System.currentTimeMillis();
 
 
		while(running){
			long now = System.nanoTime();
			long passedTime = now - lastTime;
			if(passedTime > 0){
				unprocessedTime+=passedTime;
				while(unprocessedTime >= nanoPerMove){
					move();
					unprocessedTime-=nanoPerMove;
				}
				lastTime = now;
			}
			render(g);
			frames++;
 
			if(System.currentTimeMillis()-1000>=lastFpsTime){
				lastFpsTime+=1000;
				System.out.println("Fps = " + frames);
				frames = 0;
			}
 
			Graphics2D g2 = (Graphics2D)getGraphics();
			g2.drawImage(i, 0, 0, 1592,966, null);
			g2.dispose();
			try{
				Thread.sleep(1);
			}catch (InterruptedException e){
 
			}
		}
	}
 
	public void move(){
		scene.move();
	}
 
	public void render(Graphics2D g){
		scene.render(g);
	}
}

Do u suggest i go with something like this? or am i still getting it wrong? because the ball looks soo fuzzy =/

 
public class Start {
 
	public static void main(String[]args){
		Main main = new Main();
		main.start();
	}
}

import java.awt.BasicStroke;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
 
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
 
 
public class Main extends Canvas implements Runnable {
	private static final long serialVersionUID = 1L;
 
	boolean running = false;
	BufferedImage i;
	Graphics2D g;
	Thread t;
	long lastTime;
	MyPanel panel;
 
	public Main(){
		init();
	}
 
	public void init(){
		initGUI();
		i = new BufferedImage(960,720,BufferedImage.TYPE_INT_ARGB);
		g = (Graphics2D) i.getGraphics();
		lastTime = System.nanoTime();
	}
 
	public void initGUI(){
 
		JFrame frame = new JFrame("Game name");
		panel = new MyPanel();
		JButton button_1 = new JButton();
		JButton button_2 = new JButton();
		Container pane = frame.getContentPane();
		pane.setLayout(null);
		pane.add(panel);
		panel.setBounds(0, 0, 960, 720);
		pane.add(button_1);
		button_1.setBounds(1050, 50, 50, 50);
		pane.add(button_2);
		button_2.setBounds(1150, 50, 50, 50);
		frame.setMinimumSize(new Dimension(1250,1000));
		frame.setLocationRelativeTo(null);
		frame.setResizable(false);
		frame.setVisible(true);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
 
	public void start(){
		if(running) return;
		t = new Thread(this);
		t.start();
		running = true;
	}
 
	public void stop(){
		running = false;
	}
 
	public void run(){
		long moveTime = 1000000000/60;
		int frames = 0;
		long lastFpsTime = System.currentTimeMillis();
		long unprocessedTime = 0;
 
		while(running){
			long now = System.nanoTime();
			long passedTime = now - lastTime;
			if(passedTime > 0){
				unprocessedTime += passedTime;
				while(unprocessedTime >= moveTime){
					unprocessedTime-=moveTime;
					panel.move();
				}
				lastTime = now;
			}
			panel.repaint();
			frames++;
 
			if(System.currentTimeMillis()-lastFpsTime>= 1000){
				lastFpsTime+=1000;
				System.out.println("Fps: "+ frames);
				frames = 0;
			}
		}
	}	
}
 
class MyPanel extends JPanel{
	private static final long serialVersionUID = 1L;
	int speedX = 5;
	int speedY = 5;
	int x = 0;
	int y = 0;
 
	@Override
    public void paintComponent(Graphics g){
        Graphics2D g2d = (Graphics2D)g;
        super.paintComponent(g2d);
        render(g2d);
    }
 
	public void render(Graphics2D g){
		g.setColor(Color.white);
		g.fillRect(5, 5, 950, 710);
		g.setColor(Color.black);
		g.setStroke(new BasicStroke(5));
		g.drawRect(5, 5, 950, 710);
		g.setColor(Color.blue);
		g.fillOval(x,y,50,50);
		g.setColor(Color.black);
		g.setStroke(new BasicStroke(2));
		g.drawOval(x, y, 50, 50);
	}
 
	public void move(){
		if(x > this.getBounds().width - 50)speedX = -speedX;
		if(x < 0 ) speedX = -speedX;
 
		if(y > this.getBounds().height - 50)speedY = -speedY;
		if(y< 0)speedY = -speedY;
 
		x+=speedX;
		y+=speedY;
	}
}

Oh yes. i noticed i dont even need the bufferedImage. i edited my last post adding a ball animation. but it looks so fuzzy, should i try double buffering or something?