Java Linked Pro

Search elements of Linked List Java

import java.util.LinkedList; 

public class SearchElementLinkedListExample

{

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");

lList.add("2");

int index = lList.indexOf("2");

if(index != -1)

{

System.out.println("First occurrence of 2 in LinkedList is at index : "

+ index);

}

else

{

System.out.println("LinkedList does not contain 2");

}

index = lList.lastIndexOf("2");

if(index != -1)

{

System.out.println("Last occurrence of 2 in LinkedList is at index : "

+ index);

}

else

{

System.out.println("LinkedList does not contain 2");

     }

  }

}

Simple Java Linked List

import java.util.LinkedList;

public class SimpleJavaLinkedListExample

{

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");

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

   }

}

Add or insert an element to Array List using Java List Iterator

import java.util.ListIterator;

import java.util.ArrayList;

public class AddAnElementUsingListIteratorExample

{

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");

ListIterator listIterator = aList.listIterator(); listIterator.next(); listIterator.add("Added Element");

System.out.println("After inserting element, ArrayList contains");

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

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

   }

}

Get Previous and next index using Java List Iterator

import java.util.ListIterator;

import java.util.ArrayList;  

public class GetPreviousAndNextIndexListIteratorExample

{

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");

ListIterator listIterator = aList.listIterator();

System.out.println("Previous Index is : " + listIterator.previousIndex());  

System.out.println("Next Index is : " + listIterator.nextIndex());

listIterator.next();

System.out.println("After increasing current position by one element : ");

System.out.println("Previous Index is : " + listIterator.previousIndex());  

System.out.println("Next Index is : " + listIterator.nextIndex());

    }

}

Remove an element from Array List using Java List Iterator

import java.util.ListIterator;

import java.util.ArrayList;

public class RemoveAnElementUsingListIteratorExample

{

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");

ListIterator listIterator = aList.listIterator();

listIterator.next();

listIterator.next();

listIterator.remove();

System.out.println("After removing 2, ArrayList contains");

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

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

    }

}