Arraylist集合三种排序，arraylist集合排序

Arraylist集合三种排序，arraylist集合排序

将员工存储到Arraylist集合中,先后按照工资、年龄、名字来排序

员工类

public class Employee {
    private String name; //姓名
    private int age; //年龄
    private double salary; //名字
    public Employee(String name, int age, double salary) {
        super();
        this.name = name;
        this.age = age;
        this.salary = salary;
    }
    public Employee() {
        super();
    }
    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;
    }
    @Override
    public String toString() {
        return "姓名：" + name + ", 年龄" + age + ", 工资：" + salary;
    }


}

测试类

package paixu;

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

public class Test {
    public static void main(String[] args) {
        Employee e1 = new Employee("Alis",24,3070);
        Employee e2 = new Employee("tom",28,3030);
        Employee e3 = new Employee("Jack",25,3000);
        Employee e4 = new Employee("Lily",19,3500);
        Employee e5 = new Employee("Mike",23,3040);
        Employee e6 = new Employee("Bobo",24,2000);

        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() - 1; j++) {
                Employee emp1 = list.get(j);
                Employee emp2 = list.get(j+1);

                //收入比较
                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()){
                        //按比较规则比较名字
                        if(emp1.getName().compareTo( emp2.getName())>0){
                            list.set(j, emp2);
                            list.set(j+1, emp1);    
                        }
                    }
                }
            }
        }
        //遍历
        for (Employee e : list) {
            System.out.println(e);
        }
    }

}