java basics

In Java, when we talk about pass-by-value and pass-by-reference, we are referring to how arguments are passed to methods. It is important to have a clear understanding of these concepts as they play a crucial role in Java programming. Understanding pass-by-value and pass-by-reference is crucial in Java programming because it helps prevent confusion and ensures…

The Java Virtual Machine (JVM) is an integral part of the Java platform and is responsible for executing Java code. It provides a platform-independent environment for running Java applications, allowing developers to write code once and run it anywhere. Understanding how the JVM works is essential for Java developers to optimize performance and ensure the…

Variables are an essential part of programming in Java. They are used to store data that can be later retrieved and manipulated. Understanding the different types of variables and their scope is crucial to writing efficient and maintainable code. In this tutorial, we will discuss the basics of variables in Java, including what they are,…

Primitive type Wrapper class boolean Boolean byte Byte char Character float Float int Integer long Long short Short double Double class Test { int id = 5; Integer id1 = id; // autoboxing } class Test { public static void main(String[] args) { int a = 10; int b = 20; List<Integer> list = new…

Programming languages like Java rely on the use of data types to manage and manipulate data in a program. Data types are a fundamental concept in programming and understanding them is crucial to becoming a proficient Java developer. Java has two main categories of data types: primitive data types and reference data types. Primitive data…

Welcome to this tutorial on how to compile and run your first Java program. Java is a versatile and widely used programming language, known for its portability and platform independence. Whether you are new to programming or have experience with other languages, this tutorial will provide you with a step-by-step guide to writing and executing…

If you’re new to Java programming or just starting out, it can be a bit overwhelming to know where to begin. That’s why I’ve put together this guide to help you get set up with everything you need to start developing Java applications. In this tutorial, I’ll walk you through the steps of downloading and…

class Test { public static void main(String[] args) { short a = 10; int b = a; // automatically converts the short type into int type int c = 10; long d = c; // automatically converts the integer type into long type float f = d; // automatically converts the long type into float…

Operator Description Example + Indicates positive value +a – Negates an expression value (Converts positive number to negative) -a ++ Increments a value by 1 ++a — Decrements a value by 1 –a ! Inverts the value of a boolean type !true gives false %= Assigns the remainder to the left operand when dividing the…

Java is a programming language that is widely known for its versatility, power, and many features. It is popular among developers due to its object-oriented design, portability, and strong security. Java’s object-oriented design allows developers to organize their code into modular units, making it easier to build large-scale applications. Java’s portability means that code can…

class Vehicle { int maxSpeed = 250; public void printMaxSpeed() { System.out.println(“Max speed: ” + maxSpeed); } } class Car extends Vehicle { int maxSpeed = 300; @Override public void printMaxSpeed() { System.out.println(“Max speed: ” + maxSpeed); } } class Test { public static void main(String[] args) { Vehicle vehicle = new Car(); // upcasting…