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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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Java Programming

Posted inInheritance

👉 Introduction to GUI Programming with AWT (Layouts + Components + Basics)

🚀 GUI Programming in Java using AWT (Complete Guide with Layout Managers & Programs) 🌟 Introduction In earlier programs, we interacted with users using the console (CLI) — typing inputs and printing outputs. But modern applications…
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🚀 Exception Handling in Java: Complete In-Depth Guide (Types, Keywords, Examples & Best Practices)

🌟 Introduction While writing programs, errors are inevitable. These errors may occur due to invalid input, file issues, network problems, or logical mistakes. If not handled properly, they can cause your program to crash unexpectedly. ❌…
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🚀 Multithreaded Programming in Java: In-Depth Guide (Threads, Lifecycle, Runnable, Methods & Priority)

🌟 Introduction In today’s world of high-performance applications, responsiveness and speed are crucial. Whether it’s a web server handling thousands of users or a desktop app performing background tasks, Multithreading plays a vital role. 🧠⚡ Java…
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7-🧩 Abstract Classes in Java – Complete Guide with Examples, Rules & Common Mistakes

🌟 Introduction As you progress in Java and Object-Oriented Programming (OOP), you will often face situations where: Some methods should be common for all classes Some methods should be implemented differently by each class And some…
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6-🧪 Java Lab Session (2 Hours) – Inheritance, Method Overriding & Constructor Chaining

🌟 Introduction In this lab session, you will work with some of the most important concepts of Java: Inheritance Multilevel Inheritance Method Overriding Constructors in Inheritance This session is designed to help you understand concepts through…
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6-🔗 Constructors in Inheritance in Java – Constructor Chaining Explained with Examples & Common Mistakes

🌟 Introduction In the previous articles, we explored: Inheritance Method Overriding super keyword Now comes a very important concept that explains what happens during object creation: 👉 Constructors in Inheritance (Constructor Chaining) Whenever we create an…
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5-🔑 super Keyword in Java – Complete Guide with Examples, Constructor Calls & Common Mistakes

🌟 Introduction In the previous articles, we explored: Inheritance Types of Inheritance Method Overriding Parent Reference & Child Object Now comes a very important concept that connects all of these together: 👉 The super keyword When…
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4-🔄 Parent Reference & Child Object in Java – Understanding A obj = new B() Clearly

🌟 Introduction In the previous article, we learned about method overriding and how Java decides method execution at runtime. Now we move to one of the most important and confusing concepts in Java OOP: 👉 Parent…
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3-🔁 Method Overriding in Java – Complete Guide with Examples, Rules & Common Mistakes

🌟 Introduction In the previous articles of this series, we learned: What inheritance is Different types of inheritance in Java Now comes one of the most important and powerful concepts in Java OOP: 👉 Method Overriding…
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2-🧬 Types of Inheritance in Java – Complete Guide with Examples, Code & Common Mistakes

🌟 Introduction In the previous article of this inheritance series, we learned the basic concept of inheritance in Java—how a class can inherit properties and behaviors from another class using the extends keyword. Inheritance allows programmers…
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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

  • 🚀 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.

Inheritance

Chapters

  • 🧾 Java OOP Practical Exam – Set 14 (Advanced + Carefully Structured)
  • 🧾 Java OOP Practical Exam – Set 13 (Detailed + Logic Twist)
  • 🧾 Java OOP Practical Exam – Set 12 (Detailed + Slightly Advanced)
  • 🧾 Java OOP Practical Exam – Set 11 (Detailed & Student-Friendly)
  • 🧾 Java OOP Practical Exam – Set 10 (Integrated System Based)
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