import?java.awt.Color;
import?java.awt.Graphics2D;


public?class?Bullet?{

	//?Fields
	private?int?x;
	private?int?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?=?2;
		
		rad?=?Math.toRadians（angle）;
		speed??=?10;
		dx?=?Math.cos（rad）?*?speed;
		dy?=?Math.sin（rad）?*?speed;
		
		color1?=?Color.YELLOW;
	}
	
	//?Functions
	public?boolean?update（）?{
		x?+=?dx;
		y?+=?dy;
		
		if?（x??GamePanel.WIDTH?+?r?||?y??GamePanel.HEIGHT?+?r）?{
			return?true;
		}
		
		return?false;
	}
	
	public?void?draw（Graphics2D?g）?{
		g.setColor（color1）;
		g.fillOval（x?y?2?*?r?2?*?r）;
	}
	
	public?double?getX（）?{
		return?x;
	}

	public?double?getY（）?{
		return?y;
	}

	public?int?getR（）?{
		return?r;
	}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2013-12-21?05:30??record\
?????文件?????????953??2013-12-19?21:48??record\Bullet.java
?????文件????????4537??2013-12-21?02:59??record\Enemy.java
?????文件?????????826??2013-12-21?01:37??record\Explosion.java
?????文件?????????369??2013-12-17?08:31??record\Game.java
?????文件???????14315??2013-12-21?03:08??record\GamePanel.java
?????文件????????4706??2013-12-21?03:19??record\Player.java
?????文件????????1735??2013-12-21?03:06??record\PowerUp.java
?????文件????????1136??2013-12-21?02:35??record\Text.java