bullet.java

Java Shooting Game !

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;

public class Bullet
{
	double px, py;
	double vx, vy;
	boolean visible;
	int rangeX, rangeY;
    int r = 2;
	Color color;
	
	public Bullet()
	{
		setXY(0, 0);
		setV(0, 0);
	}
	public Bullet(int x, int y)
	{
		setXY(x, y);
		setV(0,0);
	}
	public void setRange(int w, int h)
	{
		rangeX = w;
		rangeY = h;
	}
	public void setColor(Color color)
	{
		this.color = color;
	}
	public void setXY(double x, double y)
	{
		px = x;  py = y;
	}
	public void setV(double vx, double vy)
	{
		this.vx = vx;
		this.vy = vy;
	}
	public boolean isVisible()
	{
		return visible;
	}
	public void setVisible(boolean canBeSeen)
	{
		visible = canBeSeen;
	}
	public void show(Graphics g)
	{
		if ( visible )
		{
			g.setColor(color);
			g.fillOval((int)(px-r), (int)(py-r), 2*r, 2*r);
		}
	}
	public void move(int dx, int dy)
	{
		px += dx;
		py += dy;
	}
	public void moveTo(int x, int y)
	{
		px = x;
		py = y;
	}
	public void moveToNext()
	{
		px += vx;
		if ( px<=r ) 
		{
			px = r;
			vx = -vx;
		}
		else if ( px>=rangeX-r )
		{
			px = rangeX-r;
			vx = -vx;			
		}
		py += vy;
		if ( py<=r ) 
		{
			py = r;
			vy = -vy;			
		}
		else if ( py>=rangeY-r )
		{
			py = rangeY-r;
			vy = -vy;			
		}	
	}
	public Point getXY()
	{
		Point pt = new Point();
		pt.x = (int)px;
		pt.y = (int)py;
		
		return pt;
	}
}