Java Tutorial for Beginners : Complete Visual Learning

In this tutorial will take you through the foundational aspects of Java, its history, and its key features. By the end of this session, you should have a clear understanding of what makes Java special and why it remains a popular choice for developers.

In this session, we will explore the key components that make Java a robust and widely-used programming language: JVM (Java Virtual Machine), JDK (Java Development Kit), and JRE (Java Runtime Environment). These components are essential for developing and running Java applications efficiently.

In this session, we'll explore the concept of RAM (Random Access Memory) and its functionality in computer systems. RAM is a crucial component in computing, enabling quick access and processing of data by the CPU.

In this lesson, we explore various numerical data types in Java, including byte, short, int, and long. We learn how to declare these data types, assign values to them, and understand their ranges and behaviors. Additionally, we discuss variable naming conventions and a concept called "looping" in data types.

In this lesson, we will see:

Primitive Data Types: Basic data types in Java are categorized as numerical (integers and real numbers) and non-numerical (characters and boolean).

Reference Data Types: These include objects and arrays, which are not covered in this session.

In this lesson, we will see:

• Purpose of Operators: Operators are special symbols that perform operations on variables and values.

• Types of Operators: Java provides various operators grouped into different categories based on their functionality.

In this lesson, we will see:

Conditional statements in Java allow us to execute different blocks of code based on specific conditions. These are fundamental for controlling the flow of a program and making decisions.

In this session, we will delve into practical examples to understand how to use if-else statements effectively in Java. We will cover the concepts of statement precedence and condition precedence through a series of examples, including how to determine if a given year is a leap year.

In this lesson, we will see:

Loops and Their Usage

In this lesson, we will see: while loop, do-while loop and for loop.

Core Java Concepts

In this session, we covered:

1. Understanding number-based problems.

2. Using loops to solve number-based problems.

3. Writing efficient code to handle these problems.

4. Analyzing the concept of perfect numbers.

5. Practicing the identification of prime numbers.

In this tutorial, we will delve into prime numbers, understand how to check if a number is prime, and extend this concept to identify all prime numbers within a given range. This guide will break down the concepts and code step-by-step, making it easy to follow and implement.

This study guide will cover the following key concepts and coding techniques for understanding and implementing Armstrong numbers and number crunching in Java. We'll break down the process, code, and logic in a detailed and easy-to-understand manner.

In this lesson, we will see: Patterns in Java involve printing symbols or characters in a specific order, creating visually recognizable structures. These exercises are commonly used in coding interviews to assess logical thinking and coding skills.

Welcome to the next session on advanced pattern programming. Building on the basics we've covered, we'll now dive into more complex patterns, including number-based and string-based patterns. These patterns are crucial for enhancing problem-solving skills and are often featured in technical interviews.

In this lesson, we will see: Patterns Programs

In this lesson, we will see: Array

In this lesson, we will see: Array Insertion.

In this lesson, we will see: Array Deletion.

In this tutorial session, we'll delve into the fundamental concepts of searching and sorting arrays in Java. These operations are essential for organizing and retrieving data efficiently in programming.

In this session, we will learn how to find the smallest and second smallest elements in an array efficiently. This problem is crucial for coding interviews and exams, where time complexity constraints are common. We will discuss:

1. Basic concept and naive solution.

2. Efficient solution with time complexity considerations.

In this lesson, we will see: Sliding Window Concept

In this session, we delve into solving an array rotation problem frequently encountered in product-based company interviews. The goal is to rotate an array to the right by a given number of positions. We'll explore a detailed step-by-step approach to understand the problem, develop a solution, and optimize the code.

In this tutorial, we'll cover the problem of finding the minimum number of swaps required to rearrange an array such that all elements on the left of a given key element are less than the key and all elements on the right are greater than the key. This problem is useful for understanding array manipulation and optimizing operations within constraints.

In this session, we will learn about multi-dimensional arrays. A multi-dimensional array can be visualized as arrays within arrays, where a one-dimensional array is a simple list, a two-dimensional array can be seen as a grid or a matrix, and higher-dimensional arrays extend this concept further.

In coding interviews, one common type of problem involves multi-dimensional arrays, particularly the spiral matrix problem. Understanding how to navigate and manipulate these arrays is crucial. This guide will help you understand how to approach and solve spiral matrix problems, a skill that will serve you well in technical interviews.

In this lesson, we will see: Introduction to Mutable and Immutable Strings

In this lesson, we will see:  Strings

we will delve into string tokenizer, a feature that adds functionality not available in both strings and string buffers.

In this session, we will cover:

1. Understanding ASCII values

2. Character-based string manipulations

3. Writing code to alternate between upper and lower case characters in a string

4. Practical coding examples

In this session, we'll cover how to handle word-based string questions in Java. Previously, we dealt with character-based manipulations where we alternated between uppercase and lowercase characters. This time, we’ll focus on reversing words in a string and alternately converting them to uppercase and lowercase.

This session covers the concept of number-based strings, where characters and numbers are intertwined in a single string. The goal is to extract and manipulate these components separately.

In this lesson, we will see:  OOPs

In this tutorial, we will explore how to create and use classes and objects in Java. We will define a class Dog with properties and methods, and understand the concepts of static methods and variables. This session is a hands-on guide to understanding basic Object-Oriented Programming (OOP) concepts in Java.

In this session, we will explore two fundamental concepts in Java: Constructors and Encapsulation. These concepts are crucial for creating robust and maintainable code in Java.

In this session, we will explore the concept of polymorphism in Java, specifically focusing on method overloading. Polymorphism allows us to perform a single action in different ways, enhancing flexibility and reusability in code. We will understand method overloading by creating multiple methods with the same name but different parameters.

In this lesson, we will see:  Inheritance and Method Overriding

In this lesson, we will see:  Abstract Classes and Interfaces