🧠 Do You Know?
🤖 5 Interesting Facts About Java ☕
1️⃣ Arrays in Java are 🧱 objects, even if they store primitives.
2️⃣ You can use underscores _ in numbers for readability 👉 1_000_000.
3️⃣ null can be cast to any 🧩 reference type, but using it throws a NullPointerException ❗
4️⃣ Enums are like full 🚀 classes – they can have constructors, methods & fields.
5️⃣ final variables can be left uninitialized but must be set later (e.g., in a constructor) ✅
🤖 5 Interesting Facts About Java ☕
1️⃣ Arrays in Java are 🧱 objects, even if they store primitives.
2️⃣ You can use underscores _ in numbers for readability 👉 1_000_000.
3️⃣ null can be cast to any 🧩 reference type, but using it throws a NullPointerException ❗
4️⃣ Enums are like full 🚀 classes – they can have constructors, methods & fields.
5️⃣ final variables can be left uninitialized but must be set later (e.g., in a constructor) ✅
🖥️ Types of Applications we can create in Java:
1. 📟 Console Applications – Text-based apps using terminal/command line
2. 🖼️ Desktop Applications – GUI apps using JavaFX/Swing (e.g., Notepad clone)
3. 🌐 Web Applications – Server-side apps using JSP, Servlets, Spring Boot
4. 📱 Mobile Applications – Android apps using Java with Android SDK
5. 🏢 Enterprise Applications – Large-scale apps using Java EE (e.g., Banking systems)
6. 🎮 Game Development – 2D/3D games using LibGDX or similar libraries
7. ☁️ Cloud-Based Applications – Scalable apps deployed on AWS, Azure, etc.
8. 🤖 IoT Applications – Smart device control using Java ME
9. 📊 Big Data Applications – Data processing using Hadoop in Java
10. 🧪 Scientific Applications – Simulations, heavy calculations in science
1. 📟 Console Applications – Text-based apps using terminal/command line
2. 🖼️ Desktop Applications – GUI apps using JavaFX/Swing (e.g., Notepad clone)
3. 🌐 Web Applications – Server-side apps using JSP, Servlets, Spring Boot
4. 📱 Mobile Applications – Android apps using Java with Android SDK
5. 🏢 Enterprise Applications – Large-scale apps using Java EE (e.g., Banking systems)
6. 🎮 Game Development – 2D/3D games using LibGDX or similar libraries
7. ☁️ Cloud-Based Applications – Scalable apps deployed on AWS, Azure, etc.
8. 🤖 IoT Applications – Smart device control using Java ME
9. 📊 Big Data Applications – Data processing using Hadoop in Java
10. 🧪 Scientific Applications – Simulations, heavy calculations in science
🚀 DSA using Java Free Tutorials 📚
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https://smartprogramming.in/tutorials/dsa-using-java/introduction-to-data-structures-and-algorithms
Hey everyone! 🎉 I’ve just started creating easy-to-understand DSA notes 📚 on my website, packed with colorful examples, icons & clear explanations.....check the notes and provide me your feedback !!
https://smartprogramming.in/tutorials/dsa-using-java/introduction-to-data-structures-and-algorithms
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Data Structures and Algorithms in Java | Learn DSA with Examples
Learn Data Structures and Algorithms in Java with practical examples. Enhance your coding skills with in-depth explanations of arrays, linked lists, trees, sorting, searching, and more.
✨ Difference between Abstraction and Encapsulation in Java ✨
1️⃣ Abstraction
Focus: Hides implementation details, shows only functionality.
How: Achieved using abstract classes & interfaces.
Example: You drive a car without knowing how the engine works.
2️⃣ Encapsulation
Focus: Hides data (fields/variables) by wrapping with methods.
How: Achieved using private variables & getter/setter methods.
Example: ATM machine hides your balance, lets you access via PIN.
👉 In short:
Abstraction → Hides “what” happens inside.
Encapsulation → Hides “how” data is accessed & modified.
1️⃣ Abstraction
Focus: Hides implementation details, shows only functionality.
How: Achieved using abstract classes & interfaces.
Example: You drive a car without knowing how the engine works.
2️⃣ Encapsulation
Focus: Hides data (fields/variables) by wrapping with methods.
How: Achieved using private variables & getter/setter methods.
Example: ATM machine hides your balance, lets you access via PIN.
👉 In short:
Abstraction → Hides “what” happens inside.
Encapsulation → Hides “how” data is accessed & modified.
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I’ve created notes up to Java IO. Check them out here: https://smartprogramming.in/tutorials/
Your support motivates me!
It takes a lot of effort to create these notes for you all free of cost, so please provide your valuable feedback here :
https://g.page/smartprogramming/review?nr
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Tutorials by Smart Programming
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❤6👍1
🔑 Difference between Abstraction vs Encapsulation in Java
📌 1. Purpose
- Abstraction: Hides implementation details and shows only essential features.
- Encapsulation: Hides data by binding it with methods.
📌 2. Implementation
- Abstraction: Achieved using abstract classes & interfaces.
- Encapsulation: Achieved using classes, getters & setters.
📌 3. Focus
- Abstraction: Focuses on what to do (not how to do it).
- Encapsulation: Focuses on how to protect data from outside access.
📌 4. Example
- Abstraction: Car.start() – you just start, don’t know the internal mechanism.
- Encapsulation: private balance in a BankAccount class accessed via getBalance().
📌 1. Purpose
- Abstraction: Hides implementation details and shows only essential features.
- Encapsulation: Hides data by binding it with methods.
📌 2. Implementation
- Abstraction: Achieved using abstract classes & interfaces.
- Encapsulation: Achieved using classes, getters & setters.
📌 3. Focus
- Abstraction: Focuses on what to do (not how to do it).
- Encapsulation: Focuses on how to protect data from outside access.
📌 4. Example
- Abstraction: Car.start() – you just start, don’t know the internal mechanism.
- Encapsulation: private balance in a BankAccount class accessed via getBalance().
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