String In Java

• In Java, a String is an object used to store a sequence of characters.

• A String in Java is a predefined class used to store text data or a collection of characters.

• Java treats every text value inside double quotes (" ") as a String.

• Java Strings are immutable, which improves security and performance

• Without String, handling text data in programs becomes difficult.

Why String is Used:

String is mainly used to store:

• Names

• Messages

• Email IDs

• Addresses

• Passwords

• Sentences

Two way of creating String:

1. Using String Literal:

String name = "Java";

Explanation:

• String → datatype/class

• name → variable name

• "Java" → string value

This is the most commonly used method.

Java stores this inside the String Constant Pool.

2. Using new Keyword:

String name = new String("Java");

Explanation:

• Creates a new String object in heap memory

• Even if "Java" already exists, a new object is created

Program:

public class Main {

    public static void main(String[] args) {

        String s1 = "Hello";

        String s2 = new String("World");

        System.out.println(s1);
        System.out.println(s2);
    }
}

Output: