java(Collection接口)练习07

.定义一个Employee类,属性:name:String,age:int,salary:double
把若干Employee对象放在List中,排序并遍历输出,排序规则:salary高的在前面,salary相同时age大的在前面,age也相同时按照name升序排列
把若干Employee对象放在Set中并遍历,要求没有重复元素
package com.oracle.test1025;

public class Employee {

private String name;private int age;private double salary;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 double getSalary() {    return salary;}public void setSalary(double salary) {    this.salary = salary;}public Employee(String name, int age, double salary) {    super();    this.name = name;    this.age = age;    this.salary = salary;}public Employee() {    super();    // TODO Auto-generated constructor stub}@Overridepublic String toString() {    return "姓名:" + name + ", 年龄:" + age + ", 工资:" + salary ;}   

}

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package com.oracle.test1025;

import java.util.ArrayList;
import java.util.List;

public class Test {

public static void main(String[] args) {    Employee e1 = new Employee("大海燕",19,3000);    Employee e2 = new Employee("小黑",20,3100);    Employee e3 = new Employee("傲娇",18,4000);    Employee e4 = new Employee("苏老大",22,5000);    Employee e5 = new Employee("马冬梅",21,2000);    Employee e6 = new Employee("女神",18,7000);    List<Employee> list = new ArrayList<Employee>();    list.add(e1);    list.add(e2);    list.add(e3);    list.add(e4);    list.add(e5);    list.add(e6);    for (Employee e : list) {        System.out.println(e);    }    System.out.println("==============排序后==================");    for (int i = 1; i < list.size(); i++) {        for (int j = 0; j < list.size()-i; j++) {            Employee emp1 = list.get(j);            Employee emp2 = list.get(j+1);            //比较收入            if(emp1.getSalary()<emp2.getSalary()){                list.set(j, emp2);                list.set(j+1, emp1);            }else if(emp1.getSalary() == emp2.getSalary()){                //比较年龄                if(emp1.getAge() < emp2.getAge()){                    list.set(j, emp2);                    list.set(j+1, emp1);                }else if(emp1.getAge() == emp2.getAge()){                    if(emp1.getName().compareTo(emp2.getName())>0){                        list.set(j, emp2);                        list.set(j+1, emp1);                    }                }            }        }    }    for (Employee e : list) {        System.out.println(e);    }}

}