Day-55 Today I Started Java Classes – Here Are the Features We Discussed

Today was my first day in Java class at my institute. We started with an introduction to Java and discussed its features. Here is what I understood

1. Simple

Java is easy to learn and use. Its syntax is simple compared to C++. It doesn’t have confusing concepts like pointers, so writing code becomes easier.

2. Object-Oriented[TBD]

Java is fully object-oriented. Everything in Java is treated as an object. It uses concepts like:

• Inheritance – using existing class properties in another class
• Encapsulation – hiding data using private variables and public methods
• Polymorphism – performing one task in different ways
• Abstraction – hiding unnecessary details from the user

3. Secure

Java is a secure language. It doesn’t use pointers, so no one can access memory directly. It checks the code during both compilation and runtime to avoid any security issues. That’s why banks also use Java.

4. Platform Independent

Java is platform independent. This means:

We can write code once and run it anywhere.

When we compile Java code, it converts into bytecode, which can run on any operating system with JVM (Java Virtual Machine).

5. Architecture Neutral

Java is architecture neutral. Its bytecode is not specific to any processor or operating system. That means the same Java program can work on any machine without any changes.

6. Robust

Java is a strong and reliable language. It has features like:

• Automatic garbage collection to clean unused memory
• Exception handling to handle errors easily[TBD]

This makes Java programs stable and prevents crashes.

7. Multithreaded

Java supports multithreading. This means it can perform many tasks at the same time. For example, playing music while downloading files.

8. High Performance

Java is a little slower than C++ because it runs on JVM. But it uses a Just-In-Time (JIT) compiler, which converts bytecode to native machine code at runtime, improving its performance.

9. Distributed

Java supports distributed computing. Using concepts like RMI (Remote Method Invocation) and EJB (Enterprise JavaBeans), we can create programs that run on different computers connected through a network.

10. Dynamic

Java is a dynamic language. It can load classes at runtime, so we can add new features or updates without affecting the existing code much.