How to sort a List with Java Lambda

want to sort a list in java with Lambda? Here is how:

 
class Person {
	private Integer age;
	private String name;

	public Integer getAge() {
		return age;
	}

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

	public String getName() {
		return name;
	}

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

	public Person(Integer age, String name) {
		super();
		this.age = age;
		this.name = name;
	}

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

 
package com.leespace.java8;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class JavaLambdaSort {

	public static void main(String[] args) {

		 List <Person> people= getArrayList();
		 
		 //Sort by name  in traditional way with Comparator:
		 Collections.sort(people, new Comparator <Person> () {

			@Override
			public int compare(Person p1, Person p2) {
				return p1.getName().compareTo(p2.getName());
			}
		 });
		 displayList(people);
		 
		 //Sort by name  in traditional way with Comparator:
		 Collections.sort(people, new Comparator <Person> () {

			@Override
			public int compare(Person p1, Person p2) {
				return p1.getAge().compareTo(p2.getAge());
			}
		 });
		 displayList(people);
		 
		 //Sort by name  in with lambda:
		 Collections.sort(people, (p1,p2) -> p1.getName().compareTo(p2.getName()));
		 displayList(people);
		 
		 //Sort by age  in with lambda:
		 Collections.sort(people, (p1,p2) -> p1.getAge().compareTo(p2.getAge()));
		 displayList(people);
		 
	}

	private static void displayList(List<Person> people) {
		System.out.println("\nThe sorted list:");
		for (Person p:people) {
			 System.out.println(p);
		 }
	}

	private static List<Person>   getArrayList() {
		List<Person> people = new ArrayList<Person>();
		Person person1 = new Person(21, "Jack Lee");
		people.add(person1);
		Person person2 = new Person(31, "Jack Ma");
		people.add(person2);
		Person person3 = new Person(12, "Steve Liu");
		people.add(person3);
		Person person4 = new Person(42, "Alice XU");
		people.add(person4);
		
		return people;
	}

}