Java Iterator Pro

Iterate through elements Java Vector using Iterator

import java.util.Vector;

import java.util.Iterator;

public class IterateThroughVectorUsingIteratorExample

{

public static void main(String[] args)

{

Vector v = new Vector();

v.add("1");

v.add("2");

v.add("3");

v.add("4");

v.add("5");

Iterator itr = v.iterator();

System.out.println("Iterating through Vector elements...");

while(itr.hasNext())

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

   }

}

Iterate through elements Java Array List using Iterator

import java.util.ArrayList;

import java.util.Iterator;

public class IterateThroughArrayListUsingIteratorExample

{

public static void main(String[] args) 

{

ArrayList arrayList = new ArrayList();

arrayList.add("1");

arrayList.add("2");

arrayList.add("3");

arrayList.add("4");

arrayList.add("5");

Iterator itr = arrayList.iterator();

System.out.println("Iterating through ArrayList elements...");

while(itr.hasNext())

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

   }

}

Iterate through elements of Java Linked List using Iterator

import java.util.Iterator;

import java.util.LinkedList;

public class IterateThroughLinkedListUsingIteratorExample

{

public static void main(String[] args)

 {

LinkedList lList = new LinkedList();

lList.add("1");

lList.add("2");

lList.add("3");

lList.add("4");

lList.add("5");

Iterator itr = lList.iterator();

System.out.println("Iterating through elements of Java LinkedList...");

System.out.println("LinkedList contains : ");

while(itr.hasNext())

{

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

     }

  }

}

Remove an element from Collection using Java Iterator

import java.util.Iterator;

import java.util.ArrayList;

public class RemoveElementThroughIteratorExample

{

public static void main(String[] args)

{

ArrayList aList = new ArrayList();

aList.add("1");

aList.add("2");

aList.add("3");

aList.add("4");

aList.add("5");

System.out.println("ArrayList before removal : ");

for(int i=0; i< aList.size(); i++)

System.out.println(aList.get(i));   Iterator itr = aList.iterator();

String strElement = "";

while(itr.hasNext())

{

strElement = (String)itr.next();

if(strElement.equals("2"))

{

itr.remove();

break;

}

}

System.out.println("ArrayList after removal : ");

for(int i=0; i< aList.size(); i++)

System.out.println(aList.get(i));

   }

}