Implement the age of the person object, from small to large sort

1. Implementation sequencing

1PackageCom.app;23ImportJava.util.ArrayList;4ImportJava.util.Collections;5ImportJava.util.Comparator;6ImportJava.util.List;78PublicClass A1Extendsb{910PublicStaticvoidMain (string[] args) {List<person> List =GetData ();12//Sort13Collections.sort (list, comparator);1415For(Person Person:list) {System.out.println ("person" + person.getname () + "" +Person.getage ());17}1819}2021st/**22* Age is sorted by small to large23*/24static Comparator<person> Comparator =New comparator<person>() {25@Override26PublicIntCompare (person P1, person p2) {27if (P1.getage () >P2.getage ()) {28return 1;//Positive29}Elseif (P1.getage () <P2.getage ()) {30return-1;//Negative31}Else{32return 0;//Equal to 033}34}35};3637StaticPrivate list<person>GetData () {List<person> List =New arraylist<>() ;39P1 =NewPerson ();P1.setage (10);P1.setname ("P1");43P2 person =NewPerson ();P2.setage (30);P2.setname ("P2");47P3 =NewPerson ();P3.setage (20);P3.setname ("P3");51P4 person =new54 p4.setname ("P4"  56  List.add (p1);  List.add (p2);  List.add (p3);  List.add (p4); 61 return list; 62 }63}       

2. Create the Person class

PackageCom.app;PublicClassperson {PrivateIntAge;Private String name; public int Getage () { Span style= "color: #0000ff;" >returnpublic void setage (int  age) {this.age = Age;} public String GetName () { return name; public void SetName ( String name {this.name = name;}}     

3. Results of operation (to achieve the sorting of age)

Person P1, Person P4, p3 person p2

Get ""

Implement the age of the person object, from small to large sort