How to Iterate ArrayList using Java ListIterator Example

Rabu, 09 Maret 2016

1.Basic Java example program to iterate arraylist elements using list iterator

package com.javaIteratearraylistiterator;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
public class IterateListIteratorArrayList{
public static void main(String[] args) {
//create an ArrayList object
ArrayList<String> arrayList = new ArrayList();
//Add elements to Arraylist
arrayList.add("A");
arrayList.add("B");
arrayList.add("C");
arrayList.add("D");
arrayList.add("F");
arrayList.add("F");
arrayList.add("G");
arrayList.add("H");
arrayList.add("I");
/*
Get a ListIterator object for ArrayList using
istIterator() method.
*/
ListIterator itr = arrayList.listIterator();
/*
Use hasNext() and next() methods of ListIterator to iterate through
the elements in forward direction.
*/
System.out.println("Iterating through ArrayList elements in forward direction...");
while(itr.hasNext())
System.out.println(itr.next());
/*Use hasPrevious() and previous() methods of ListIterator to iterate through
the elements in backward direction.*/
System.out.println("Iterating through ArrayList elements in backward direction...");
while(itr.hasPrevious())
System.out.println(itr.previous());
}
}