Java Learning-linked list (1)

/** * Single-link list operation * Create by Administrator * 2018/6/14 0014 * pm 2:05 **/public class Link {public int iData;    public double dData;    Public Link Next;        public Link (int ID, double dd) {this.idata = ID;    This.ddata = DD;    } public void DisplayLink () {System.out.print ("{" + IData + "," + DData + "}");    }}class linklist {private Link first;    Public linklist () {this.first = null;    public Boolean isEmpty () {//To determine if the list is empty return (first = = null);           Public link find (int key) {//Find the specified object Link current = first; Get the first dot while (current.idata! = key) {//Weight first start traversing if (Current.next = = null) {return null            ;                 Results not found}else {current = Current.next;//Get Next}} return current;        Find results} public link Delete (int key) {//Delete specified object link current = first;    Link previous = first;    while (current.idata! = key) {if (Current.next = = null) {return null;                }else {previous = current;            current = Current.next;        }} if (current = = first) {first = First.next;        }else {previous.next = Current.next;    } return current;        } public void Insertfirst (int id,double dd) {link link = new Link (ID, DD);          Link.next = First;               The reference to the storage object first = link; Assign the current object to the first} public link Deletefrst () {//delete the top list, exactly and add the opposite if (!isempty ()) {Link TEMP = Firs            T            first = First.next;        return temp;    } return null;        } public void Displaylist () {System.out.print ("List (first-->last):");        Link current = first;            while (current = null) {Current.displaylink ();        current = Current.next;    } System.out.println (""); }    public static void Main (string[] args) {linklist thelist = new linklist ();        Thelist.insertfirst (22,2.99);        Thelist.insertfirst (44,4.99);        Thelist.insertfirst (66,6.99); Thelist.insertfirst (88,8.99);

        Thelist.displaylist ();//While        (!thelist.isempty ()) {//            Link ALink = Thelist.deletefrst ();/            / System.out.print ("Deleted");//            Alink.displaylink ();//            System.out.println ("");//        }        Link f = Thelist.find (a);        if (f! = null) {            System.out.print ("Find Link:");            F.displaylink ();            System.out.println ("");            Link result = Thelist.delete (f.idata);            if (result! = null) {                System.out.print ("delete Success");                Result.displaylink ();            }        }        System.out.println ("");        Thelist.displaylist ();    }}

　　

Java Learning-linked list (1)