Master Java From Fundamentals to Pro

How To Write Lambda Expressions

This lesson introduces the basic lambda expression structure with tips to write efficient code.

What Are Lambda Expressions?

This is an introductory lesson on lambda expressions. You will learn about the lambda operator, expression, syntaxes and more!

Power Of Two (Exercise Problem)

This is an exercise problem for your practice. Try to come up with an approach and solve it by yourself. Good Luck!

User-Defined Customer Interface (Exercise Problem)

This is an exercise problem for your practice. Try to come up with an approach and solve it by yourself. Good Luck!

What Are UnaryOperator And BinaryOperator?

Unary and Binary operators are the other two functional interfaces that most developers are interested in.

BiFunction Interface

This lesson talks about the third functional interface, which is the BiFunction.

What Is a Predicate Interface In Java?

This lesson talks about the third functional interface, which is the Predicate.

What is a Function Interface In Java?

This lesson talks about the third functional interface, which is the Function.

What is a Supplier Interface in Java?

This lesson talks about the second functional interface, which is the Supplier.

What is Consumer Interface in Java?

This lesson talks about the first functional interface, which is the Consumer.

A Detailed Guide On Java Built-In Functional Interfaces

This lesson details about the various functional interfaces that fall under major 4 categories.

What Are Functional Interfaces in Java? With Examples

This is the introductory lesson on functional interfaces. Introduced in Java SE 8, these are powerful and most useful as either lambdas or method reference can use it.

What Are The 3 Types Of Interfaces Available in Java?

In this lesson, you will learn how immutability is achieved through functional programming.

What is Immutability in Java Functional Programming?

In this lesson, you will learn how immutability is achieved through functional programming.

What are Pure & Impure Functions?

This lesson details pure and impure functions with various examples for understanding.

What Problems Does Functional Programming Solve in Java?

Functional programming solves almost all of the business use cases OOP solves. In fact, functional programming reduces bugs due to its immutability in nature.

How is Functional Programming Different From OOP?

In this lesson, you will learn about functional programming and the fundamental differences between object-oriented and functional programming.

What is Declarative Programming? With Examples

In this lesson, you will learn declarative programming and the steps to achieve it. You will also be introduced to some real-world use cases for easy understanding.

What is Imperative Programming? With Examples

In this lesson, you will learn imperative programming and the steps to achieve it. You will also be introduced to some real-world use cases for easy understanding.

What Are Programming Paradigms?

In this lesson, you will learn various programming paradigms in computer science.

Introduce Yourself To Functional Programming

Functional programming(a programming paradigm) was introduced in Java SE 8 and recently gained popularity. The number of lines written by developers in the last few years using functional programming(for open-source projects) did hustle around Java developers. Why developers love functional programming? Java functional programming emphasizes using functions

Bit Manipulation Final Thoughts

Introduction To Real-Time Data

Solution Review: Get the First Set Bit Position Using the Right Shift

Challenge 1: Get the First Set Bit Position Using the Right Shift

Check If Kth Bit Is Set/Unset Using Right Shift

Solution Review: Get The First Set Bit Position Using the Left Shift

Challenge 1: Get the First Set Bit Position Using the Left Shift

How Strings Are Used In Collections?

Thread Safety: StringBuilder vs. StringBuffer

Performance Comparison Of StringBuilder vs. String Concatenation

String, StringBuilder, and StringBuffer

String Immutability

Number Formatting

Parsing Strings To Primitive Types

String Formatting in Java (%s, %d, %f)

String trim(), replace(), split()

Searching And Indexing: indexOf(), lastIndexOf()

Iteration (using loops)

substring()

String Concatenations

String Comparisons [null, ==, .equals()]

Overview Of String Methods

Strings Memory Management (Heap vs. Stack)

What is String Pool in Java?

How To Create Strings in Java?

What is a String in Java?

Maven Interview Q&A

Maven Best Practices For Reliable & Efficient Builds

Integrating Maven With CI/CD

Maven Multi-Module Projects

Maven Profiles

Maven Plugins

Handling Dependency Conflicts

Managing Dependencies in Maven

Common Maven Commands

Maven Build Life Cycle

NoSuchBeanDefinitionException: The Most Common Spring Bean Error

How to fix the "port 8080 already in use error on Windows and macOS

Subsets/Powerset

Your First Maven Project

Maven project structure

Understanding pom.xml

How to install Maven

Arithmetic and Logical Right Shifts

Bitwise Left Shifts

Introduction to Bit Shifting

Solution Review: Missing Number

Challenge 2: Missing Number

Solution Review: Single Number

Challenge 1: Single Number

Hamming Distance

Detect If Two Integers Have Opposite Signs

Find Odd Occurring Element

Check If Kth Bit Is Set/Unset Using Left Shift

Find the Bit Length of a Number

Big O Complexities

Best Practices, Error Handling

Why Use Maven? 🤔

Autoboxing And Unboxing

8 Primitive Types

Difference Between Primitives And Wrappers

Subsets Or Powerset

Common 3D Array Use-Cases

Traversing 3D Arrays

Solution Review: Single Number

Challenge 2: Single Number

Solution Review: Missing Number

Challenge 1: Missing Number

How to reverse the letters in a string in Java

Reverse Array: Array In-Place Algorithm

Find Odd Occurring Element

What is Immutability?

Access 3D Arrays

3D: Three-Dimensional Arrays

Subsets Or Powerset

Bitwise Left Shifts

Introduction to Bit Shifting

Solution Review: Missing Number

Find The Missing Number From The Array