摘要:
主函数测试方法: public class TestATM { public static void main(String[] args) { ABCATM a = new ABCATM(); //ICBCImpl icbc = new ICBCImpl(3000, "123456");//工商卡 阅读全文
摘要:
UnionPay接口:用于描述银联统一指定的规则 public interface UnionPay { /* * 接口:用于描述银联统一指定的规则 */ public double getBalance();//查看余额 public boolean drawMoney(double number 阅读全文
摘要:
抽象类:Shape public abstract class Shape { protected double c; public abstract double area();} 类Square正方形,继承抽象类 public class Square extends Shape{ public 阅读全文