Core Java Interview preparation

How to create Threads by Implementing Runnable Interface in Java In this tutorial, we will discuss, What are threads? Difference between Thread and Process. How to create Threads by Implementing Runnable Interface? Video Tutorial: What are Threads…? Thread is a tiny program running continuously. It is sometimes called a lightweight process. But there lie differences […]

How to make classes as Threadable using Thread Class In this tutorial, we will discuss, What are threads? Difference between Thread and Process. How to make classes Threadable using Thread class? Video Tutorial: What are Threads…? One of the exciting features of the Windows operating system is that – It allows the user to handle

Implementing multiple inheritances using interfaces in Java Write a Java program to demonstrate the role of interfaces while implementing multiple inheritances in Java. Video Tutorial: Before we understand, how to use an interface to implement multiple inheritances, we will discuss the types of inheritance supported by Java. There are four types of Inheritance: 1. Single

Java program to find the area of rectangle and triangle using Interface Write a Java program to define an interface called Area which contains a  method called Compute() and calculate areas of the rectangle(I*b) and triangle(1/2*b*h) using classes Rectangle and Triangle.   Video Tutorial: Step1: Create an interface in Java as shown below: public interface

In this article, I will cover, What are Interfaces in Java? Difference between Class & Interface. How to Extend and Implement Java Interface? Video Tutorial – Difference between Class & Interface Extend Implement Interface: Definition of Java Interface: An interface is similar to a class but there lies some difference between the two. Difference between

How Java provides access protection using Packages In this article, I will cover, What are Java Packages Types of Java Packages How to create a user-defined Package in Java How to Import Java Packages Sample Program to demonstrate access protection in Java using Packages Video Tutorial – How Java provides access protection using Packages: If

How to Create and Import User-Defined Packages in Java In this article I will cover, What are Java Packages? Types of Java Packages How to create user-defined packages and Import Java Packages Sample Java Program to demonstrate the user-defined Java Packages Video Tutorial: A java package is a group of similar type of classes, interfaces

Java Program to print first “n” Numbers in Fibonacci Series Write a Java Program to display first “n” numbers in the Fibonacci series. Fibonacci series: 0, 1, 1, 2, 3, 5, 8, 13 and so on If the value of n is 5, then the expected output is 0, 1, 1, 2, 3 Logic is:

Write a Java Program to find sum of numbers divisible by 7 between 100 to 200 Write a Java program to find the number of and the sum of all numbers greater than 100 and less than 200 which are divisible by 7. Video Tutorial: Steps (Program logic): 1. Declare two local variables sum and

Write a Java Program to find Sum, Product, and Average of an Array Write a Java Program to Find the Sum of array elements, Product of array elements, and Average of elements of a single dimensional array. Video Tutorial: Steps (Program logic): 1. Declare the local variables like a, sum, prod, avg to store array