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SinglyLinkedList4.java
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108 lines (106 loc) · 1.92 KB
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public class SinglyLinkedList4 {
class Node{
int data;
Node next;
Node(int data){
this.data=data;
this.next=null;
}
}
Node head=null;
Node tail=null;
void addNode(int data) {
Node n=new Node(data);
if(head==null) {
head=n;
tail=n;
}
else {
tail.next=n;
tail=n;
}
}
void deleteAtbeg() {
if(head==null) {
System.out.println("List is Empty");
return;
}
else if(head !=tail) {
head=head.next;
}
else {
head=tail=null;
}
}
void deleteAtend() {
if(head==null) {
System.out.println("List is Empty");
return;
}
else if(head !=tail) {
Node temp=head;
Node ptr=temp.next;
while(ptr.next !=null) {
temp=ptr;
ptr=ptr.next;
}
temp.next=null;
}
else {
head=tail=null;
}
}
void deleteAtmid(int pos) {
if(head==null) {
System.out.println("List is Empty");
return;
}
else if(head !=tail) {
Node temp=head;
Node ptr=temp.next;
for(int i=0; i<pos-2; i++) {
temp=ptr;
ptr=ptr.next;
}
temp.next=ptr.next;
}
else {
head=tail=null;
}
}
void display() {
Node current=head;
if(head==null) {
System.out.println("List is Empty");
return;
}
else {
while(current !=null) {
System.out.print(current.data+",");
current=current.next;
}
System.out.println();
}
}
public static void main(String[] args) {
SinglyLinkedList4 s1=new SinglyLinkedList4();
s1.addNode(10);
s1.addNode(20);
s1.addNode(30);
s1.addNode(40);
s1.addNode(50);
s1.addNode(60);
s1.addNode(70);
s1.addNode(80);
s1.display();
System.out.println("After Delete Elements from begining");
s1.deleteAtbeg();
s1.display();
System.out.println("After Delete Elements From end");
s1.deleteAtend();
s1.display();
System.out.println("After Delete Elements from mid");
s1.deleteAtmid(4);
s1.display();
}
}