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    1. package com.atguigu.exercise3;
    2. public class Order {
    4.     //属性
    5.     private int orderId;
    6.     private String orderName;
    9.     //构造器
    10.     public Order(){
    12.     }
    13.     public Order(int orderId,String orderName){
    14.   this.orderId = orderId;
    15.   this.orderName = orderName;
    16.     }
    19.     //方法
    20.     public int getOrderld() {
    21.   return orderId;
    22.     }
    24.     public void setOrderld(int orderId) {
    25.   this.orderId = orderId;
    26.     }
    28.     public String getOrderName() {
    29.   return orderName;
    30.     }
    32.     public void setOrderName(String orderName) {
    33.   this.orderName = orderName;
    34.     }
    36.     public boolean equals(Object obj){
    37.   if(this == obj){
    38.       return true;
    39.   }
    40.   if(obj instanceof Order){
    41.       Order order = (Order)obj;
    42.       return this.orderId == order.orderId && this.orderName.equals(order.orderName);
    43.   }
    44.   return false;
    45.     }
    46. }
    1. package com.atguigu.exercise3;
    2. public class OrderTest {
    3.     public static void main(String[] args) {
    4.   Order order1 = new Order(1001,"AA");
    5.   Order order2 = new Order(1001,"BB");
    7.   System.out.println(order1.equals(order2));
    9.   Order order3 = new Order(1001,"BB");
    10.   System.out.println(order2.equals(order3));
    11.     }
    12. }