Hi I think it is usefull to u.. Thank you 

import java.util.*;
public class  LL
{
	public static void main(String[] args)
	{

	   List ll=new LinkedList();
	   ll.add(new Character('a'));
	   ll.add(new Character('b'));
	   ll.add(new Character('d'));
	   ll.add(new Character('a'));
	   ll.add(new Character('d'));
	   ll.add(new Character('f'));
           ll.add(new Character('b'));
	   System.out.println("Content ="+ll);
       System.out.println("Size    ="+ll.size());



        int a=0;
	   ListIterator litr1=ll.listIterator();
	   ListIterator litr2=ll.listIterator();

	   while(litr1.hasNext())
		{
		   Object obj1=litr1.next();
		   Character str1=(Character)obj1;
		   char ch1=str1.charValue();

		   while(litr2.hasNext())
		{
		   Object obj2=litr2.next();
		   Character str2=(Character)obj2;
		   char ch2=str2.charValue();

		   if(ch1==ch2)
			{

			   a++;
			}
		}
		System.out.println(ch1+" is repeated in "+a+" Times");
		a=0;
		while(litr2.hasPrevious())
			{
			Object o=litr2.previous();
			}


		}

	}
}