magcard.java

所学课程的编码。java的基础例子。可以练习java通过这些例子。。

/*
 * Created on 2005-10-9
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package chap05;

/**
 * @author Administrator
 * 
 * TODO To change the template for this generated type comment go to Window -
 * Preferences - Java - Code Style - Code Templates
 */
class MagCard extends None_Number_PhoneCard {

	String usefulArea;

	boolean performDial() {
		if (balance > 0.9) {
			balance -= 0.9;
			return true;
		} else
			return false;
	}
}