Program：按照如下要求设计类：

（1）设计一个日期类，用于记录年、月、日，并提供对日期处理的常用方法。

（2）设计一个职工类，该职工类至少具有下面的属性：职工号，姓名，性别，生日，工作部门，参加工作时间，设计相应的方法。

（3）设计一个测试类，采用对象数组模拟一个拥有10个职工的单位。

以下是日期类和员工类的实现

/*

 * Description:定义日期时间类

 *

 * Written By:Cai

 *

 * Date Written:2017-10-09

 *

 *

 * */

package entity;

public class MyDate {

    private String year;    //年

    private String month;   //月

    private String day;     //日

　　//定义构造方法

    public MyDate() {

    }

    public MyDate(String year,String month,String day) {

        this.year = year;

        this.month = month;

        this.day = day;

    }

    //定义setter和getter方法

    public String getYear() {

        return year;

    }

    public void setYear(String year) {

        this.year = year;

    }

    public String getMonth() {

        return month;

    }

    public void setMonth(String month) {

        this.month = month;

    }

    public String getDay() {

        return day;

    }

    public void setDay(String day) {

        this.day = day;

    }

    //覆写toString()方法

    public String toString() {

        return this.year + "年" + this.month + "月" + this.day + "日";

    }

}

 1 /*

 2  * Description:定义职工类

 3  *

 4  * Written By:Cai

 5  *

 6  * Date Written:2017-10-09

 7  *

 8  *

 9  * */

10

11 package entity;

12

13 import entity.MyDate;

14

15 public class Worker {

16

17     String workerId;        //职工号

18     String workerName;        //职工姓名

19     String workerSex;        //职工性别

20     String workerPartment;    //职工部门

21     MyDate workerBirthday;    //职工生日

22     MyDate workerBeginDate;    //职工开始工作时间

23

24

25     //定义构造方法

26     public Worker() {

27

28     }

29

30     public Worker(String id,String name,String sex,String partment,MyDate birthday,MyDate beginDate) {

31

32         this.workerId = id;

33         this.workerName = name;

34         this.workerSex = sex;

35         this.workerPartment = partment;

36         this.workerBirthday = birthday;

37         this.workerBeginDate = beginDate;

38     }

39

40

41     //定义setter和getter方法

42     public String getWorkerId() {

43         return workerId;

44     }

45

46     public void setWorkerId(String workerId) {

47         this.workerId = workerId;

48     }

49

50     public String getWorkerName() {

51         return workerName;

52     }

53

54     public void setWorkerName(String workerName) {

55         this.workerName = workerName;

56     }

57

58     public String getWorkerSex() {

59         return workerSex;

60     }

61

62     public void setWorkerSex(String workerSex) {

63         this.workerSex = workerSex;

64     }

65

66     public String getWorkerPartment() {

67         return workerPartment;

68     }

69

70     public void setWorkerPartment(String workerPartment) {

71         this.workerPartment = workerPartment;

72     }

73

74     public MyDate getWorkerBirthday() {

75         return workerBirthday;

76     }

77

78     public void setWorkerBirthday(MyDate workerBirthday) {

79         this.workerBirthday = workerBirthday;

80     }

81

82     public MyDate getWorkerBeginDate() {

83         return workerBeginDate;

84     }

85

86     public void setWorkerBeginDate(MyDate workerBeginDate) {

87         this.workerBeginDate = workerBeginDate;

88     }

89

90     //覆写toString方法

91     @Override

92     public String toString() {

93         return "Worker [workerId=" + workerId + ", workerName=" + workerName

94                 + ", workerSex=" + workerSex + ", workerPartment="

95                 + workerPartment + ", workerBirthday=" + workerBirthday

96                 + ", workerBeginDate=" + workerBeginDate + "]";

97     }

98

99 }

 1 /*

 2  * Description:定义测试类，模拟十个职工的单位

 3  *

 4  * Written By:Cai

 5  *

 6  * Date Written:2017-10-09

 7  *

 8  * */

 9

10 package main;

11

12 import entity.*;

13

14 public class TestDemo {

15

16     public static void main(String args[]) {

17

18         Worker[] workers = new Worker[10];        //声明Worker类数组对象，大小为10

19

20         //为数组对象依次赋值

21         for( int i = 0; i < 10; i++ ) {

22

23             workers[i] = new Worker("00000" + i,"worker_" + i,"男","办公室" + i,new MyDate("2017","10",(i + 1) + "" ),new MyDate("2017","11","" + (i + 1) ));

24         }

25

26         //打印数组对象

27         display(workers);

28

29     }

30

31     //定义方法，打印Worker类的数组对象信息

32     public static void display(Worker[] workers) {

33

34         for( int i = 0; i < workers.length; i++ ) {

35             System.out.println( workers[i] );

36         }

37     }

38

39 }