selfaddingovalbad.java

Java程序设计(美) David D. Riley著 机械工业出版社 书籍配套 代码

// Figure 15.4

/**	Note that this class relies upon a specific kind of Driver class,
 *	and is an inferior design than the original Oval class.
 *	A better alternative is shown in Figure 15.5 
 */
public class SelfAddingOvalBad extends Oval  {

	/**	pre:	The Driver class must include a public, static
	 *			variable, called window, of type JFrame
	 *			and  window != null  <br>
	 *	post:	this is instantiated
	 *			and  getX() == x  and  getY() == y
	 *			and  getWidth() == w  and  getHeight() == h
	 *			and  getParent() == window.getContentPane()  
	 */
	public SelfAddingOvalBad(int x, int y, int w, int h )   {
		super(x, y, w, h);
		Driver.window.add(this, 0);
		repaint();
	}
	
}