定義私有屬性: *String name; * int age; * String gender; * int salary; Date hiredate;//入職時間

import java.text.SimpleDateFormat;

import java.util.Date;

/**

 * 定義私有屬性:

 * String name;

 * int age;

 * String gender;

 * int salary;

 * Date hiredate;//入職時間

 *

 * 定義構造方法，以及屬性get,set方法.

 * 定義toString方法，格式如:

 *    姓名:張三,年齡:25,性別:男,薪資:5000,入職時間:2006-02-15

 *

 * 定義equals方法，要求名字以及年齡相同，則認為內容一致。

 *

 * 實現Comparable介面，並重寫抽象方法comparaTo()，比較規則為年齡小的人小。

 * @author Xiloer

 *

 */

public class Emp implements Comparable{

    private String name;

    private int age;

    private String gender;

    private int salary;

    private Date hiredate;

    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

    public  Emp(String name, int age, String gender, int salary, Date hiredate) {

        // TODO Auto-generated method stub

        this.name = name;

        this.age = age;

        this.gender = gender;

        this.salary = salary;

        this.hiredate = hiredate;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

    public String getGender() {

        return gender;

    }

    public void setGender(String gender) {

        this.gender = gender;

    }

    public int getSalary() {

        return salary;

    }

    public void setSalary(int salary) {

        this.salary = salary;

    }

    public Date getHiredate() {

        return hiredate;

    }

    public void setHiredate(Date hiredate) {

        this.hiredate = hiredate;

    }

    @Override

    public boolean equals(Object obj) {

        if(obj instanceof Emp) {

            Emp emp = (Emp) obj;

            Emp emp1 = (Emp) obj;

            return name.equals(emp.name) && age==emp1.age;

        }

        return false;

    }

    @Override

    public String toString() {

        return "姓名:"+name+",年齡:"+age+",性別:"+gender+",薪資:"+salary+",入職時間:"+sdf.format(hiredate);

    }

    /*對於返回值，如果呼叫compareTo()方法的物件等於引數，則返回0，

     *如果大於引數，則返回一個大於0的值，

     *如果小於引數，則返回一個小於0的值

    */

    @Override

    public int compareTo(Object o) {

        Emp e = (Emp) o;

        if(age>e.age) return 1;

        if(age<e.age) return -1;

        return 0;

    }

}