-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathA007QueueUsingLL.java
More file actions
77 lines (70 loc) · 1.95 KB
/
A007QueueUsingLL.java
File metadata and controls
77 lines (70 loc) · 1.95 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
public class A007QueueUsingLL{
private class Node{
int data ;
Node next;
Node(int data){
this.data = data ;
this.next = null;
}
}
private Node head = null , tail = null ;
public void enqueue (int data ){
Node tmp = new Node(data);
if (isEmpty()) {
head = tmp;
tail = head;
}else{
tail.next = tmp;
tail = tmp;
}
}
public int dequeue(){
int data = -1;
if (!isEmpty()) {
data = head.data ;
head = head.next;
if(head == null ){
tail = null ;
}
return data;
}
System.out.println("queue is Empty!! ");
return data;
}
public boolean isEmpty(){
if(head == null && tail == null ){
return true ;
}
return false;
}
public void printQueue(){
Node tmp = head;
System.out.print("Queue is : ");
while (tmp != null){
System.out.print(tmp.data+"-> ");
tmp = tmp.next;
}
System.out.println();
}
// Queue is : 10-> 20-> 30->
// Queue is :
// queue is Empty!!
// Queue is : 3-> 6-> 2->
public static void main(String[] args) {
A007QueueUsingLL queue = new A007QueueUsingLL();
queue.enqueue(10);
queue.enqueue(20);
queue.enqueue(30);
//queue.enqueue(363);queue.enqueue(362);queue.enqueue(930);queue.enqueue(130);queue.enqueue(344);queue.enqueue(34);queue.enqueue(340);queue.enqueue(50);queue.enqueue(40);
queue.printQueue();
queue.dequeue();
queue.dequeue();
queue.dequeue();
queue.printQueue();
queue.dequeue();
queue.enqueue(3);
queue.enqueue(6);
queue.enqueue(2);
queue.printQueue();
}
}