21st Computer Tech

💻 Exploring 21st-century computing | 🚀 Tech trends, coding, AI & innovation | 🌐 Future-ready insights

[21st Computer Tech @21stCompTech]

@marianatimes Your thinking is very narrow.

[21st Computer Tech @21stCompTech]

Abstract Classes vs Interfaces

👻 Abstract classes = half-built houses.
🚪 Interfaces = house blueprints.
Java gives you both.
Use wisely:
Abstract for shared logic
Interface for shared contracts
#Java
#OOP

[21st Computer Tech @21stCompTech]

In JAVA Overloading vs Overriding: Know the Difference

🔥 Overloading vs Overriding

➡️ Overload: Same name, diff parameters (compile-time).
➡️ Override: Same name, same params, different behavior (runtime).
One’s flexibility.
The other’s identity.
#Java

[21st Computer Tech @21stCompTech]

Security → hash and encrypt data for safety.

Date/Time API → handle dates and times cleanly.

Annotations → add metadata for frameworks and tools.

[21st Computer Tech @21stCompTech]

Master Advanced Java Functions! Here’s a quick cheat sheet 👇
#Java
#Coding

[21st Computer Tech @21stCompTech]

NIO → modern file reading/writing.

Regex → match patterns in text.

Logging → track app behavior.

[21st Computer Tech @21stCompTech]

☕️ Java isn’t just coffee—it’s powerful code! Check out this visual guide to advanced Java functions every dev should know.
#Java
#Coding
#CodingLife

[21st Computer Tech @21stCompTech]

Important Python functions
#Python
#Coding

[21st Computer Tech @21stCompTech]

* File.createNewFile(): This method attempts to create a new, empty file at the path specified by the File object. It returns true if the file was successfully created, and false if it already exists or couldn't be created for other reasons.

[21st Computer Tech @21stCompTech]

Important Java Functions and Their Uses
* String.length(): This method returns the number of characters in a String object. For example, if you have String name = "Java";, name.length() would return 4.

[21st Computer Tech @21stCompTech]

* Thread.sleep(): This method causes the currently executing thread to pause for a specified amount of time (in milliseconds). It's often used to introduce delays in a program's execution.

[21st Computer Tech @21stCompTech]

Important Java functions
#Java

[21st Computer Tech @21stCompTech]

Basic data structures in Java
#Java
#DataStructures