Java Tutorial

Java is a high-level programming language originally developed by Sun Microsystems and released in 1995. Java runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX. This tutorial gives a complete understanding of Java. This reference will take you through simple and practical approaches while learning Java Programming language.

Audience

This tutorial has been prepared for the beginners to help them understand the basic to advanced concepts related to Java Programming language.

Prerequisites

Before you start practicing various types of examples given in this reference, we assume that you are already aware about computer programs and computer programming languages.

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Momo suicide game

Microsoft clamps down on sick 'Momo suicide game' in 'Minecraft' Microsoft is clamping down on the sick “Momo suicide challenge,” which recently infiltrated the wildly popular online game “Minecraft.”The tech giant owns “Minecraft” developer Mojang. The vile “Momo suicide game” has been garnering attention after spreading on WhatsApp, prompting police warnings. "Momo" is a viral challenge that asks people to add a contact via WhatsApp - they are then urged to commit self-harm or suicide. The "game" has fueled comparisons to the sinister " Blue Whale challenge " that led to reports of suicides in Russia and the U.S, as well as the online fictional character of "Slender Man." In 2014 two 12-year-old girls in Wisconsin attempted to kill a classmate in an attempt to please the horror character. The Buenos Aires Times recently reported that police in Argentina are investigating whether “Momo” is linked to the suicide of a 12-y...

Create WAR file in Spring Boot

This is just a three step simple procedure to package your application into war. Extending Main Class First, we extend our main class to SpringBootServletInitializer. This tells spring that your main class will be the entry point to initialize your project in server. ? 1 2 3 4 5 6 7 @SpringBootApplication public class Application extends SpringBootServletInitializer{ public static void main(String[] args) { SpringApplication.run(Application. class , args); } } Overriding configure method Next, we overload the configure method of SpringBootServletInitializer. We tell spring to build the sources from our Main class. Your final Main class should look like this: ? 1 2 3 4 5 6 7 8 9 10 11 12 @SpringBootApplication public class Application extends SpringBootServletInitializer{ public static void main(String[] args) { ...

Java - Basic Operators

Java provides a rich set of operators to manipulate variables. We can divide all the Java operators into the following groups − Arithmetic Operators Relational Operators Bitwise Operators Logical Operators Assignment Operators Misc Operators The Arithmetic Operators Arithmetic operators are used in mathematical expressions in the same way that they are used in algebra. The following table lists the arithmetic operators − Assume integer variable A holds 10 and variable B holds 20, then − Show Examples Operator Description Example + (Addition) Adds values on either side of the operator. A + B will give 30 - (Subtraction) Subtracts right-hand operand from left-hand operand. A - B will give -10 * (Multiplication) Multiplies values on either side of the operator. A * B will give 200 / (Division) Divides left-hand operand by right-hand operand. B / A will give 2 % (Modulus) Divides left-hand operand by right-hand operand and returns remainder. B % A will give 0 ++ (Increment) Increases the v...

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