根据list集合某个字段进行排序

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

class Student {

    private String name;

    private double age;

    public Student(String name, double age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getAge() {
        return age;
    }

    public void setAge(double age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Perosn [name=" + name + ", age=" + age + "]";
    }
}

public class ListSort {

    public static void main(String[] args) {

        List<Student> students = new ArrayList<>();

        students.add(new Student("abc", 12.124));
        students.add(new Student("bcd", 20.214));
        students.add(new Student("cde", 17.321));
        students.add(new Student("def", 25.145));
        students.add(new Student("efg", 15.145));

        students.sort((x, y) -> Double.compare(x.getAge(), y.getAge()));//这方法需要jdk1.8以上

        for (Student stu : students) {
            System.out.println(stu);
        }
    }
}