Hjälp - Collision detection märker inte av i hög hastighet

public void gameLoop() {
		long timeStart = System.currentTimeMillis();
		
		while (running) {
			long timePassed = System.currentTimeMillis() - timeStart;
			update();
			
			//uppdatera bilderna
			Graphics2D g = sm.getGraphics();
			draw(g);
			g.dispose();
			sm.update();
			
			try{
				Thread.sleep(10);
			} catch (Exception ex) {}
		}
	}

package sprites;


import java.awt.Graphics2D;
import java.awt.Image;

import javax.swing.ImageIcon;

import other.*;

public class Green {

	private Image green;
	
	private int x;
	private int y;
	
	//private float vx;
	//private float vy;
	
	private int width;
	private int height;
	private int boundX;
	private int boundY;
	private int boundWidth;
	private int boundHeight;
	private double xFriction;


	
	public Green(int x, int y) {
		 this.x = x;
		 this.y = y;
		 green = new ImageIcon(this.getClass().getResource("/images/green.png")).getImage();
		 width = 102;
		 height = 38;
		 boundY = y;
		 boundX = x;
		 boundWidth = width;
		 boundHeight = height;
		 xFriction = .6;
	}
	
	public void update(GolfBall GolfBall, HitBall HitBall) {
		checkCollision(GolfBall, HitBall);
	}
	
	
	private void checkCollision(GolfBall GolfBall, HitBall HitBall) {
		// TODO Auto-generated method stub
		float ballX = GolfBall.getXpos();
		float ballY = GolfBall.getYpos();
		int diameter = GolfBall.getDiameter();
		
		if (ballY + diameter > boundY && ballY < boundY + boundHeight*0.3) {
			if (ballX+diameter > boundX && ballX < x + boundWidth) {
				
				
				System.out.println(GolfBall.getSpeedX() + "X " + GolfBall.getSpeedY() + "Y ");
				if (Math.abs(GolfBall.getSpeedY()) < 0.0005f ) {
					GolfBall.setBallInAir(false);
					GolfBall.setYpos(boundY-diameter);
					GolfBall.setSpeedY(0);
					GolfBall.setSpeedX(0);
				} else {
					float changeDirectionY = (float)(-1 * GolfBall.getSpeedY());
					
					GolfBall.setYpos(y);
					GolfBall.setSpeedY(changeDirectionY);
					GolfBall.setSpeedX((float)(GolfBall.getSpeedX()*0.7));
				}
			}
		}
		/*/////////////////////DISABLED FOR NOW/////////////////////////////////
		if (ballY + diameter > boundY + boundHeight*0.5 && ballY < boundY + boundHeight) {
			if (ballX+diameter > boundX && ballX < boundX + boundWidth) {
				float changeDirectionY = (float)(-1 * GolfBall.getSpeedY());
				GolfBall.setSpeedY(changeDirectionY);
			}
		}
		/*
		if (ballY + diameter > boundY && ballY < boundY + boundHeight) {
			if (ballX+diameter > boundX && ballX < boundX + boundWidth/2) {
				float changeDirectionX = (float)(-1 * GolfBall.getSpeedX() * xFriction);
				GolfBall.setSpeedX(changeDirectionX);
			}
		}
		
		if (ballY + diameter > boundY && ballY < boundY + boundHeight) {
			if (ballX < boundX + boundWidth && ballX > boundX + boundWidth/2) {
				float changeDirectionX = (float)(-1 * GolfBall.getSpeedX() * xFriction);
				GolfBall.setSpeedX(changeDirectionX);
			}
		}*/
	}

	//get width / height
	public int getWidth() {
		return width;
	}
	
	public int getHeight() {
		return height;
	}
	
	public float getXpos() {
		return x;
	}
	
	public float getYpos() {
		return y;
	}
	
	public void setXpos(int x) {
		this.x = x;
	}
	
	public void setYpos(int y) {
		this.y = y;
	}
	
	
	/*
	public void setSpeedX(float vx) {
		this.vx = vx;
	}
	
	public void setSpeedY(float vy) {
		this.vy = vy;
	}
	
	public float getSpeedX() {
		return vx;
	}
	
	public float getSpeedY() {
		return vy;
	}
	
	public Image getGolfBall() {
		return ball;
	}*/
	
	public void paint(Graphics2D g) {
		
		g.drawImage(green,x,y,null);
	}
}

package sprites;

import java.awt.*;
import java.awt.geom.Ellipse2D;

import javax.swing.ImageIcon;

public class GolfBall {
	
	private Image ball;
	
	private float x;
	private float y;
	
	private float vx;
	private float vy;
	
	private int diameter;
	
	private boolean ballInAir = false;

	public GolfBall(float x, float y) {
		 this.x = x;
		 this.y = y;
		 ball = new ImageIcon(this.getClass().getResource("/images/golf_ball_new.png")).getImage();
		 diameter = ball.getHeight(null);
	}
	
	public void setBallInAir(boolean ballInAir) {
		this.ballInAir = ballInAir;
	}
	
	public boolean getBallInAir() {
		return ballInAir;
	}
	
	
	public void updatePos(long timePassed) {
		vy = (float) (vy - (0.00001*timePassed/50));
		x += vx*timePassed;
		y -= (vy*timePassed);
	}
	
	//get width / height
	public int getDiameter() {
		return diameter;
	}
	
	public float getXpos() {
		return x;
	}
	
	public float getYpos() {
		return y;
	}
	
	public void setXpos(float x) {
		this.x = x;
	}
	
	public void setYpos(float y) {
		this.y = y;
	}
	
	
	
	public void setSpeedX(float vx) {
		this.vx = vx;
	}
	
	public void setSpeedY(float vy) {
		this.vy = vy;
	}
	
	public float getSpeedX() {
		return vx;
	}
	
	public float getSpeedY() {
		return vy;
	}
	
	public Image getGolfBall() {
		return ball;
	}
}