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Ajay Dabade | Python & Java Learning Notes Ajay Dabade | Python & Java Learning Notes

Clear and practical Java & Python programming for engineering students.

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About Ajay Dabade
Mentor | Developer | Tech Enthusiast
primitive data types in java
Posted inData Types in Java

1-Master Primitive Data Types the easy way!

📌 Introduction In Java, data types specify the type of data a variable can store. They play a crucial role in: Memory allocation Data representation Program efficiency Error prevention Before storing any value in a variable,…
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characteristics of object oriented programming
Posted inJava Basics

7-Why Object Oriented Programming is Important. Understand its characteristics

📌 Introduction Object-Oriented Programming (OOP) is a programming paradigm that organizes software design around objects rather than functions or logic alone. Each object represents a real-world entity and contains both data and behavior. The strength of…
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Need for object oriented programming
Posted inJava Basics

6-Why we need Object Oriented Programming? Read to find it!

🧠 Need of Object-Oriented Approach 📌 Introduction In the early days of programming, software systems were small and simple. As applications grew larger and more complex, traditional programming approaches started showing limitations. Managing large codebases, maintaining…
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JVM Architecture
Posted inJava Programming JVM Internals

2-JVM Architecture made easy. Every student must know.

🧠 JVM Architecture in Detail 📌 Introduction The Java Virtual Machine (JVM) is the core component that enables Java’s platform independence, security, and performance. Every Java program runs inside a JVM, making it essential to understand…
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JIT in java explained
Posted inJava Programming JVM Internals

1-JIT (Just In Time) Compilation in java is the most smartest Java approach. Find out.

⚡ Just-In-Time (JIT) Compilation Explained 📌 Introduction While learning Java, students often hear that Java is slow because it is interpreted. However, modern Java applications perform extremely well and are used in high-performance enterprise systems. The…
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why java uses compiler and interpreter both?
Posted inJava Basics Java Programming

4-Why Java Uses Both Compiler and Interpreter? You really would fall in love with Java.

📌 Introduction One of the most common questions among Java beginners is: “If Java is compiled, why does it also need an interpreter?” This confusion arises because Java does not follow the traditional compilation model nor…
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jvm,jre,jdk and wora
Posted inJava Basics Java Programming

3-Are these Java terminologies : JDK, JRE, JVM and WORA confusing you? Read Now to find out.

📘 Important Java Terminologies Explained 📌 Introduction When learning Java, beginners often encounter several technical terms such as JDK, JRE, JVM, and WORA. These terms are fundamental to understanding how Java works internally and why it…
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2-This Java Installation and Setup Article will make your life easy.
Posted inJava Basics Java Programming

2-This Java Installation and Setup Article will make your life easy.

⚙️ Java Installation and Setup 📌 Overview Before writing and executing Java programs, Java must be properly installed on the system. A correct setup ensures that programs compile and run smoothly without unnecessary configuration issues. This…
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1-Thinking of Java Programming? Get started with the most easy way!
Posted inJava Basics Java Programming

1-Thinking of Java Programming? Get started with the most easy way!

📌 Overview Java is one of the most widely used programming languages in the world. It is a high-level, object-oriented, and platform-independent language designed to build reliable, secure, and scalable applications. Java is commonly used in:…
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Posts pagination

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Java Basics

Chapters

  • 1-Thinking of Java Programming? Get started with the most easy way!
  • 2-This Java Installation and Setup Article will make your life easy.
  • 3-Are these Java terminologies : JDK, JRE, JVM and WORA confusing you? Read Now to find out.
  • 4-Why Java Uses Both Compiler and Interpreter? You really would fall in love with Java.
  • 6-Why we need Object Oriented Programming? Read to find it!
  • 7-Why Object Oriented Programming is Important. Understand its characteristics
  • 8-Difference between a Variable and Literal. Clear your confusion.
  • 9-How to use comments the right way.
  • 10-Writing your First Hello World Program in Java? Here is all you need to know.
  • 🚀 Java Standard Libraries — Core Classes Every Java Developer Must Know

Core Java

Chapters

  • 1-Master Primitive Data Types the easy way!
  • 2-Master Non Primitive data types the easy way
  • 3-Understanding the Scanner Class the most easy way.
  • 4-Variable Scope in Java – Explained with Simple Examples & Common Confusions
  • 5-Escape Characters in Java – Complete Guide with Examples, Tricks & Common Confusions

Operators in Java

Chapters

  • 1-Arithmetic Operators in Java with Examples and Common Mistakes
  • 2-Relational Operators can be really tricky in Java!
  • 3-Common mistakes you make while using logical operators
  • 4-Understand Assignment Operator the easy way. All doubts cleared
  • 5-The Magic of Bitwise operators in Java. Know the secrets.
  • 6-Pre-Increment and Post-Increment in Java: Tricky Examples and Common Mistakes

Control statements in Java

Chapters

  • 1-The most easy way to understand if, if else and nested if statements.
  • 2-Understanding else if ladder in java the easy way
  • 3-switch statement in java (Examples and common errors)
  • 🔁 Loops explanation made easy. Do not miss it.
  • 5-Working with while and do while loop
  • 1-Arrays in Java for Beginners – Single, Multidimensional & Common Confusions
  • String Methods in Java
  • Leetcode Programs for practice
  • ArrayList in Java – Complete Guide for Beginners (With Confusions, Examples & Common Mistakes)

OOPs In Java

Chapters

  • Protected: 🚀 100 MCQs on Java Basics and Basic OOP (Exam Preparation)
  • 10-🔐 Access Modifiers in Java — Complete Guide (private, default, protected, public)
  • 9-🚀 Nested Classes and Inner Classes in Java
  • Java Practice MCQs – Missing Code (Constructors)
  • Java Practice MCQs – Missing Code Line (OOP Basics)

JVM Internals

Chapters

  • 1-JIT (Just In Time) Compilation in java is the most smartest Java approach. Find out.
  • 2-JVM Architecture made easy. Every student must know.
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