How do I save an object in a collection, and sort by properties in the object?

Package Testproject;import Java.util.arraylist;import Java.util.collections;import java.util.comparator;public Class Testpro {public static void main (string[] args) {arraylist<testpro> zslist = new arraylist<testpro> (); z Slist.add (New Testpro ("1", "0000")), Zslist.add (New Testpro ("Y", "1111")), Zslist.add (New Testpro ("Y", "1111444")); Zslist.add (New Testpro ("I Am a hot man", "2222")), Zslist.add (New Testpro ("S", "3333")), Zslist.add (New Testpro ("A", "4444")) Zslist.add (New Testpro ("I", "5555")), Zslist.add (New Testpro ("V", "6666")), Zslist.add (New Testpro ("Q", "7777")); Zslist.add (New Testpro ("I", "8888")); Collections.sort (Zslist, New comparator<testpro> () {@Overridepublic int compare (Testpro O1, Testpro O2) {//TODO Au To-generated method Stubreturn o1.getabbreviation (). CompareTo (O2.getabbreviation ());}); for (int i = 0; i < zslist.size (); i++) {System.out.println (Zslist.get (i). Getabbreviation () + "= = =" + Zslist.get (i). Getn Ame ());}} private string Abbreviation;private string Name;puBlic Testpro () {super ();} Public Testpro (string abbreviation, string name) {super (); this.abbreviation = Abbreviation;this.name = name;} Public String getabbreviation () {return abbreviation;} public void Setabbreviation (String abbreviation) {this.abbreviation = abbreviation;} Public String GetName () {return name;} public void SetName (String name) {this.name = name;}}

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How do I save an object in a collection, and sort by properties in the object?