Skip to main content

ArrayList_Implementation

How to implement your own ArrayList?
************************************
-> ArrayList is a Resizable-array of an Objects.
   In Array we don't have the capability of dynamically increasing the size of the array
   but in ArrayList we can, We know that ArrayList has initial capacity of the element
   to be added in a list, so first things we need is default initial capacity.
   second things we need an Array of Objects to store the element of the ArrayList.

->Define default initial capacity of the CustomArrayList.
-private static final int DEFAULT_INITIAL_CAPACITY = 5;
->Now declare an empty CustomArrayList which will return while creating empty CustomArrayList
-private static final Object[] EMPTY_ELEMENT_DATA = {};
->Define the size for the CustomeArrayList
-private int size;
->Now we need to define an Array of an Object to store the elements view sourceprint?
-private transient Object[] customArrayListElementData;

So it is implementaion of ArrayList.

Comments

Post a Comment

Popular posts from this blog

Mockito interview Questions

1.       Question 1. What Is Mockito? Answer : Mockito allows creation of mock object for the purpose of Test Driven Development and Behavior Driven development. Unlike creating actual object, Mockito allows creation of fake object (external dependencies) which allows it to give consistent results to a given invocation. 2.       Question 2. Why Do We Need Mockito? What Are The Advantages? Answer : Mockito differentiates itself from the other testing framework by removing the expectation beforehand. So, by doing this, it reduces the coupling. Most of the testing framework works on the "expect-run-verify". Mockito allows it to make it "run-verify" framework. Mockito also provides annotation which allows to reduce the boilerplate code. 3.       Question 3. Can You Explain A Mockito Framework? Answer : In Mockito, you always check a particular class. The dependency in that class is injected using m...
2 comments
Read more

application.properties vs application.yml vs bootstarp.yml in spring boot

APPLICATION.PROPERTIES: In Spring Boot, configuration details are kept in the  application.properties  file .The application.properties is present under   the classpath(file location src/main/resources ).The basic configuration properties like DB details, server port etc. is present in the   application.properties  file as given below – spring.datasource.url=jdbc:oracle:thin:@manoj:1521:orcl spring.datasource.username=tog spring.datasource.password=sci YAML File: Spring Boot supports YAML based properties configurations to run the application. Instead of  application.properties we can                                                         use  application.yml f...
Post a Comment
Read more

Java Example Program to Convert List to Set

import java.util.ArrayList; import java.util.HashSet; import java.util.Set; public class ListToSet {  /**   * @author Amarjit Kumar   * @category interview questions   *   * Description: Convert List to set in java with example program   *   */  public static void main(String[] args) {   ArrayList<String> arrList= new ArrayList<>();   arrList.add("Java");   arrList.add("Java");   arrList.add("List to String");   arrList.add("Example Program");   Set<String> strSet = new HashSet<String>(arrList);   System.out.println(strSet);   System.out.println(arrList);  } } /*  * Java program to convert list to set. Convert ArrayList of string to HashSet  * in java example program How to convert List to Set in java Set<String> strSet  * = new HashSet<String>(arrList); HashSet having a constructor which will take  * list as an ar...
Post a Comment
Read more