HashSet编程小案例，控制生日和姓名。重写HashCode

Java编程：

定义员工Employee类，该类包含：private成员属性name，sal，birthday(MyDate类型)，

其中birthday为MyDate类型(属性包括：year，month，day)，

要求：

1.创建3个Employee放入HashSet中；

当name和birthday的值相同时，认为是相员工，不能添加到HashSet集合中。

 @SuppressWarnings({"all"})public static void main(String[] args) {HashSet hashset = new HashSet();Employeeday19 employee1 =new Employeeday19("Tom",11000,new MyDate(2010,12,12));Employeeday19 employee2 =new Employeeday19("Simth",18000,new MyDate(2011,12,18));Employeeday19 employee3 =new Employeeday19("Jenny",31000,new MyDate(2012,12,03));hashset.add(employee1);hashset.add(employee2);hashset.add(employee3);System.out.println(hashset);Employeeday19 employee4 =new Employeeday19("Jenny",31000,new MyDate(2012,12,03));hashset.add(employee4);System.out.println("=======二次打印=======");System.out.println(hashset);}
}class MyDate {private int year;private int month;private int day;@Overridepublic String toString() {return " year=" + year +", month=" + month +", day=" + day ;}@Overridepublic boolean equals(Object o) {if (this == o) return true;if (o == null || getClass() != o.getClass()) return false;MyDate myDate = (MyDate) o;return year == myDate.year && month == myDate.month && day == myDate.day;}@Overridepublic int hashCode() {return Objects.hash(year, month, day);}public int getYear() {return year;}public void setYear(int year) {this.year = year;}public int getMonth() {return month;}public void setMonth(int month) {this.month = month;}public int getDay() {return day;}public void setDay(int day) {this.day = day;}public MyDate(int year, int month, int day) {this.year = year;this.month = month;this.day = day;}
}class Employeeday19 {private String name;private double sal;private MyDate birthday;@Overridepublic boolean equals(Object o) {if (this == o) return true;if (o == null || getClass() != o.getClass()) return false;Employeeday19 that = (Employeeday19) o;return Objects.equals(name, that.name);}@Overridepublic int hashCode() {return Objects.hash(name);}public String getName() {return name;}public void setName(String name) {this.name = name;}public double getSal() {return sal;}public void setSal(double sal) {this.sal = sal;}public MyDate getBirthday() {return birthday;}public void setBirthday(MyDate birthday) {this.birthday = birthday;}public Employeeday19(String name, double sal, MyDate birthday) {this.name = name;this.sal = sal;this.birthday = birthday;}@Overridepublic String toString() {return "name='" + name + '\'' +", sal=" + sal +", birthday：" + birthday +"\n";}