String

• A String = sequence of characters (text)

Example:

String name = "Maha";

Here, "Maha" is a string.

• Strings are IMMUTABLE

Once created, they cannot be changed

Example:

String str = "Hello";
str.concat(" World");
System.out.println(str);   

Output:

Hello

Why?
concat() creates a new string
Original string remains unchanged
✔ Correct way:

str = str.concat(" World");

• String is NOT a primitive

Unlike int, float, or char, a String is actually a class (object) in Java.

That means:

• It has methods

• It behaves differently from basic data types

🔹 Ways to create String

1_. Literal (most used)_

String a = "Hello";

Stored in String Pool (memory efficient)

2._ Using new_

String b = new String("Hello");

Creates a new object every time (less efficient)