Count the Occurrence of Character in the Linked List

~ Create an array.

~ One By One place the  character on array  on based on ASCII Value .

~ then, check the value of every index and find greater value/Occurence of Character.

public class LinkedlistOperation {

 Node head;
     class Node{
        int data;
        Node next;
           Node(int d){
               data =d;
               next = null;
       }    }

 public void OccurrenceNumber(){
    Node current= head;
    int arr[] = new int[256];
    while(current!=null){
       (arr[current.data])++;
       current =current.next;
          }
    System.out.println("Occurrence of all character are :");

    for(int i=0;i<256;i++){
        if(arr[i]>0){
          System.out.println(i+":" +arr[i]+" ");
   } } }

 public static void main(String ...args){
 LinkedlistOperation list = new LinkedlistOperation();
   list.push(1);
   list.push(1);
   list.push(3);
   list.push(4);
   list.push(2);
   list.push(2);
   list.push(15);
   list.push(20);
   list.push(1);
   list.push(1);
   list.push(3);
   list.push(4);
   list.push(5);
  list.OccurrenceNumber()  }

 OUTPUT :

Occurence of all Character are :
1:4 
2:2 
3:2 
4:2 
5:1 
15:1 
20:1