Bullet.java

import java.awt.*;
public class Bullet{
	
	//field
	private double x;
	private double y;
	private int r;
	
	private double dx;
	private double dy;
	private double rad;
	private double speed;
	
	private Color color1;
	
	//constructor
	
	public Bullet(double angle,int x,int y){
		
		this.x=x;
		this.y=y;
		r=4;
		
		rad=Math.toRadians(angle);
		speed=10;
		dx=Math.cos(rad)*speed;
		dy=Math.sin(rad)*speed;
		
		color1=Color.YELLOW;
	}
	
	//function
	
	public double getx(){return x;}
	public double gety(){return y;}
	public double getr(){return r;}
	
	public boolean update(){
		
		x+=dx;
		y+=dy;
		
		if(x<-r||x>GamePanel.WIDTH+r||y<-r||y>GamePanel.HEIGHT+r){
			return true;
		}
		return false;
	}
	
	public void draw(Graphics2D g){
	
	g.setColor(color1);
	g.fillOval((int)(x-r),(int)(y-r),2*r,2*r);
	}
}