java.util.LinkedList class

java.util.LinkedList class

java.util.LinkedList class

• We can store group of objects in LinkedList object.
• Here group of objects means, it can allow us to store same type of objects and different type of objects.
• Same type means, assuming that all objects are in the form of integer types.
• Different type means, assuming that all objects are in the form of integer, float, String, Student and Customer types also.
• It uses doubly-linked-list to store the objects. 
• It extends the AbstractList class which is abstract class and implements List and Deque interfaces.
• Size will increase dynamically.
• LinkedList is non synchronized.

Limitation

• The process of LinkedList is very slow, if you are inserting and removing the objects from middle of the LinkedList.

Inherited features from List

• We will get the output according to insertion order.
• Allows duplicate objects.

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Program         :       Example on LinkedList class

Program name  :       LLDemo1.java

Output            :         

      [1, Nireekshan, Nireekshan, A, 1.1, 1.12345]

     

import java.util.LinkedList;

class LLDemo1

{

       public static void main(String args[])

       {

             LinkedList linkedList = new LinkedList();

              

             linkedList.add(1);

             linkedList.add("Nireekshan");
             linkedList.add("Nireekshan");

             linkedList.add('A');

             linkedList.add(1.1f);

             linkedList.add(1.12345);

             

             System.out.println(linkedList);

       }

}

Compile       :         javac LLDemo1.java

Run             :         java LLDemo1

Output        :         

     [1, Nireekshan, Nireekshan, A, 1.1, 1.12345]

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Thanks for your time.

Nireekshan