Java Series Part 8: MultiThreading 101

Multithreading is a programming concept in which the application can create a small unit of tasks to execute in parallel. If you are working on a computer, it runs multiple applications and allocates processing power to them. A simple program runs in sequence and the code statements execute one by one java.lang.Runnable is an interface that … Continue reading Java Series Part 8: MultiThreading 101 →

Java Series Part 6 – Classes, Objects and Methods

A method is a block of code which only runs when it is called. You can pass data, known as parameters, into a method. Methods are used to perform certain actions, and they are also known as functions. Java is an object-oriented programming language. Everything in Java is associated with classes and objects, along with its attributes and … Continue reading Java Series Part 6 – Classes, Objects and Methods →

Java Series Part 5 – JVM, JRE and ByteCode

JVM, JRE and JDK JVM (Java Virtual Machine) is an abstract machine. It is called a virtual machine because it doesn't physically exist. It is a specification that provides a runtime environment in which Java bytecode can be executed. It can also run those programs which are written in other languages and compiled to Java … Continue reading Java Series Part 5 – JVM, JRE and ByteCode →

Java Series Part 4 – Strings & String Concatenation

Strings are used for storing text. A String variable contains a collection of characters surrounded by double quotes: String greeting = "Hello"; A String in Java is actually an object, which contain methods that can perform certain operations on strings. For example, the length of a string can be found with the length() method: String txt = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; System.out.println("The … Continue reading Java Series Part 4 – Strings & String Concatenation →

Java Series Part 3 – Variable/Data Types

Primitive Data Types Data types that can store integer values: int i;byte b;short s;long l; Variable types: byte b = 5; //8bits - 128 to 127short s = 128 //16bits - 32,768 to 32,767int i = 40000; //32 bits - 2,147,483,648 to 2,147,483,647long l = 222222222; //64bits -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807float f = 4.0f; //32 bits … Continue reading Java Series Part 3 – Variable/Data Types →

Java Series Part 2: Java Variables

Variables in Java are containers for storing data values. In Java, there are different types of variables, for example: String - stores text, such as "Hello World". String values are surrounded by double quotes int - stores integers (whole numbers), without decimals, such as 15 or -15 float - stores floating point numbers, with decimals, such as 1.99 or -1.99 … Continue reading Java Series Part 2: Java Variables →

Java Series Part 1: Java Expressions

A Java expression consists of variables, operators, literals, and method calls. package com.java.basic; public class ExpressionsExample { public static void main(String args[]) { // 5 + 2 is an expression int add = 5 + 2; System.out.println("Addition= " + add); // 5 - 2 is an expression int sub = 5 - 2; System.out.println("Substraction= " + … Continue reading Java Series Part 1: Java Expressions →

Setting up Jenkins on Windows 10

Spring Boot-Series Part 3: Deep Dive into Application Class

Application class in Spring boot is used to bootstrap and launch the Spring application from a Java main method. This class automatically creates the ApplicationContext from the classpath, it scans the configuration classes and launches the application.

Spring Boot-Series Part 2: What is pom.xml in a maven based Spring Project?

The full form of POM is Project Object Model. It is a fundamental unit of work in Maven. pom is a XML file that contains information about the project and configuration details used by Maven to build the project.

Spring Boot-Series Part 1: Setting up the maven based Spring boot application in STS or Eclipse IDE

We can create a simple spring boot project with spring initialzr or directly in STS. We will use spring initializr for this tutorial to create an simple spring boot project. Required softwares are: Java JDKSTS 4Maven 3.5Postman Let us get started. 🙂 Step 1: Go to https://start.spring.io/ Step 2: Fill the details like Project type … Continue reading Spring Boot-Series Part 1: Setting up the maven based Spring boot application in STS or Eclipse IDE →