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54 changes: 54 additions & 0 deletions queue using linkedlist
Original file line number Diff line number Diff line change
@@ -0,0 +1,54 @@
public class myqueue {
class Node{
int data;
Node next;
Node(int data)
{
this.data=data;
Node next=null;

}
}
Node head,rear;
public void enqueue(int add)
{
Node toadd =new Node(add);
if(head==null)
{
head=rear=toadd;
return;
}
rear.next=toadd;
rear=rear.next;

}
public int dequeue(){
if(head==null) {
return (Integer) null;
}
Node temp=head;
head=temp.next;

if(head==null) {
rear=null;
}
return temp.data;
}
public static void main()
{
myqueue q=new myqueue();

q.enqueue(1);
q.enqueue(2);
q.enqueue(3);
q.enqueue(4);
q.enqueue(5);
// a=q.dequeue();
//q.dequeue();
// q.dequeue();
System.out.println(q.dequeue());
}


}