文章标题

1.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.collection2;

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() {
super();
// TODO Auto-generated constructor stub
}
public Employee(String name, int age, double salary) {
super();
this.name = name;
this.age = age;
this.salary = salary;
}
@Override
public String toString() {
return “姓名” + name + “, 年龄” + age + “, 工资” + salary;
}

}

package com.oracle.collection2;

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

public class Test {

public static void main(String[] args) {    Employee e1=new Employee("Java",13,3000);    Employee e2=new Employee("PHP",13,4000);    Employee e3=new Employee("CCC",22,5000);    Employee e4=new Employee("Java",22,5000);    Employee e5=new Employee("Java",44,5000);    List<Employee> list=new ArrayList<Employee>();    list.add(e1);    list.add(e2);    list.add(e3);    list.add(e4);    list.add(e5);    for (Employee e : list) {        System.out.println(e);    }    System.out.println("======排序 后====");    //和冒泡排序相似    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);            if(emp1.getSalary()<emp2.getSalary()){                list.set(j, emp2);                list.set(j+1,emp1);            }else if(emp1.getSalary()<emp2.getSalary()){                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 employee : list) {        System.out.println(employee);    }}

}