Programmingknow

Understanding Java's main() method

public static void main(String[] args)

Every keyword has a purpose:

🔹 public → Accessible
🔹 static → No object required
🔹 void → No return value
🔹 main → Application entry point
🔹 String[] args → Command-line arguments

📌 Don't just memorize the main method. Understand it!

What is Java?

Java is a high-level, object-oriented, and platform-independent programming language.

Its biggest advantage is Write Once, Run Anywhere.

Java source code is compiled into bytecode, and the JVM executes that bytecode.

🔥 Key concepts:
• High-Level Language
• Object-Oriented
• Platform Independent
• Bytecode
• JVM
• Write Once, Run Anywhere

📌 Save this reel if you're starting your Java journey.

🔥 JDK vs JRE vs JVM — Know the Difference!

Confused about JDK, JRE, and JVM? Here's the simple breakdown:

💻 JDK → Used to develop Java applications
⚙️ JRE → Provides the environment to run Java applications
🚀 JVM → Executes Java bytecode

Remember:

JDK → JRE → JVM

📌 This is one of the most common Java interview fundamentals.

Save this reel for your Java interview preparation!

🚀 What is Java?

Java is a high-level, object-oriented, and platform-independent programming language.

One of its biggest advantages is Write Once, Run Anywhere.

Java source code is compiled into bytecode, and the JVM executes that bytecode.

🔥 Key concepts to remember:
• High-Level Language
• Object-Oriented
• Platform Independent
• Bytecode
• JVM
• Write Once, Run Anywhere

📌 If you're preparing for Java interviews, save this reel and follow the series. More Java concepts coming step by step!

☕ Java: equals() vs == — What’s the Difference?

Confused between equals() and == in Java? Here’s the simple breakdown 👇

🔹 ==
👉 Compares primitive values
👉 For objects, compares references (memory addresses)

🔹 equals()
👉 Compares object content/value (when properly overridden)

💡 Example:

String a = new String("Java"); String b = new String("Java"); System.out.println(a == b); // false System.out.println(a.equals(b)); // true

📌 Remember:
== → Are they the same reference?
equals() → Do they have the same value/content?