JAVA - Zero to Hero / Java Fundamentals

Comments in Java

💬 What Are Comments?

Comments are notes in the code that are ignored by the compiler.

They help explain what the code is doing and improve readability.

🧾 Types of Comments in Java

Type

Syntax

Use Case

Single-line

// comment

For short, quick notes

Multi-line

/* comment */

For longer explanations or block notes

🟥 Single-line Comment

Starts with // and continues to the end of the line.

// This is a single-line comment
System.out.println("Hello Java"); // Inline comment

📝 Multi-line Comment

Spans multiple lines — useful for detailed descriptions or disabling code.

/*
 This is a multi-line comment.
 It can be used to explain logic or temporarily disable code.
*/
System.out.println("Learning Java!");
Learning Java!

✅ Recap

  • Use // for short explanations

  • Use /* */ for multi-line comments or block disabling