摘要： package exer1; //工厂方法的设计模式（创建对象的时机） public class TestFactoryMethod { public static void main(String[] args) { IWorkFactory i=new TeacherWorkFactory();//多态性 IWorkFactory i1=new Stu... 阅读全文

摘要： package exer1; public class TestInterface { public static void main(String[] args) { Duck d=new Duck(); //把接口的声明设置为static的，然后不用创建对象，直接用类来调用 TestInterface.test1(d); ... 阅读全文

摘要： package exer1; //抽象类的应用 abstract public class TestEmployee { public static void main(String[] args) { Employee em=new Manager();//多态 em.work(); Employee em1=new CommonEmpl... 阅读全文

摘要： public boolean equals(Object obj) {// if (this == obj)// return true;// if (obj == null)// return false;// if (getClass() != obj.getClass())// return 阅读全文

摘要： //将继承，多态，重写的性质运用一下 package duotai; public class GeometricObject { protected String color; protected double weight; protected GeometricObject(String co 阅读全文

摘要： package hello; public class Account { protected int id; protected double balance; protected double annualInterestRate; public Account(int id, double b 阅读全文

摘要： //用数组实现银行与客户的多重关系 package banking4; public class Bank { private Customer[] customers; private int numberOfCustomer;//用于记录customer个数 public Bank(){ cus 阅读全文

摘要： package banking2; public class Customer { private String firstName; private String lastName; private Account account; public Customer(String f,String 阅读全文

摘要： package banking1; public class Account { private double balance;//账号余额 public Account(double init_balance){ balance=init_balance; } public double getB 阅读全文

摘要： package alhh;//每次创建Person1对象时，初始化对象的age和name的属性值public class TestPerson1 { public static void main(String[] args){ Person1 p=new Person1(18,"青青"); Sys 阅读全文