Intro to JAVA Simple Programing 1.

Please write the code according to the instruction, such as line of code required etc, in bold.

/**

This question practices the use of a list iterator. You have to write

a static toString(list, index) method that makes a string representation

of a list and its iterator, where you are given the index of the next

element that the iterator would return on a call to next().

The expected output is

|

A|

AB|

ABC|

|ABC

|BC

B

C

BC|

*/

import java.util.LinkedList ;

import java.util.ListIterator ;

import java.util.Scanner ;

public class LinkedListTester4

{

public static void main(String[] args)

{

LinkedList list = new LinkedList() ;

ListIterator iterator = list.listIterator() ;

System.out.println(toString(list, iterator.nextIndex())) ;

iterator.add("A") ;

System.out.println(toString(list, iterator.nextIndex())) ;

iterator.add("B") ;

System.out.println(toString(list, iterator.nextIndex())) ;

iterator.add("C") ;

System.out.println(toString(list, iterator.nextIndex())) ;

iterator = list.listIterator() ;

System.out.println(toString(list, iterator.nextIndex())) ;

if (iterator.next().equals("A"))

iterator.remove() ;

System.out.println(toString(list, iterator.nextIndex())) ;

while (iterator.hasNext())

System.out.println(iterator.next()) ;

System.out.println(toString(list, iterator.nextIndex())) ;

}

/**

A static method to return a string representation of the

list and the iterator. Note that the listIterator method

nextIndex gives the index of the next element that would be

returned by a call to next, or list size if the list iterator

is at the end of the list. The four possible pictures for a

list [A,B,C] are:

|ABC here index would be 0

A|BC here index would be 1

AB|C here index would be 2

ABC| here index would be 3 (i.e., the size of the list)

@param list the linked list of type LinkedList

@param index of next element that the iterator would return by next

@return a string representation like A|BC

*/

//-----------Start below here. To do: approximate lines of code = 11

// 1. signature of method ;

//2. initialize result to empty string ;

//3. if index is 0 ;

//then put "|" on result ;

//4. initialize count ;

//5. for each element in the list ;

//6. append element to result ;

//7. increment count ;

//8. if count is index ;

//then append "|" ;

//9. return result.

//-----------------End here. Please do not remove this comment. Reminder: no changes outside the todo regions.

}