23.LinkedList adding and removing news headlines

 Packageentity; Public classNewtitle {Private intId//ID    PrivateString TitleName;//name    PrivateString creater;//created by     PublicNewtitle () {} PublicNewtitle (intID, String titlename, String creater) {         This. ID =ID;  This. TitleName =TitleName;  This. creater =creater; }     Public intgetId () {returnID; }     Public voidSetId (intID) { This. ID =ID; }     PublicString Gettitlename () {returnTitleName; }     Public voidsettitlename (String titlename) { This. TitleName =TitleName; }     PublicString Getcreater () {returncreater; }     Public voidSetcreater (String creater) { This. creater =creater; }    }

 Packagetest;Importjava.util.LinkedList;Importentity. Newtitle; Public classNewtitledemo { Public Static voidMain (string[] args) {//Concrete Implementation Steps//1. Create multiple kinds of news title objectsNewtitle car =NewNewtitle (1, "Car", "admin"); Newtitle Medical=NewNewtitle (2, "medicine", "Administrator"); //2. Create a Collection object that stores all kinds of news headlinesLinkedList newstitlelist =NewLinkedList (); //3. Add headline news headlines and end titlesNewstitlelist.addfirst (CAR);        Newstitlelist.addlast (medical); //4. Get headlines and last news headlinesNewtitle first =(Newtitle) Newstitlelist.getfirst (); System.out.println (The headline headlines are: "+first.gettitlename ()); Newtitle Last=(Newtitle) newstitlelist.getlast (); System.out.println ("The last news headline is:" +last.gettitlename ()); //5. Delete Headlines and last news headlinesNewtitle firstnews=(Newtitle) Newstitlelist.removefirst (); System.out.println ("Deleted Headlines headline:" +firstnews.gettitlename ()); Newtitle lastnews=(Newtitle) newstitlelist.removelast (); System.out.println ("The last news title deleted is:" +lastnews.gettitlename ()); System.out.println ("Number of news bars left after deletion:" +newstitlelist.size ()); }}

23.LinkedList adding and removing news headlines