Explain the String Pool concept in Java and its role in managing string objects.

String Pool in Java is a special area in memory (usually in the permanent generation space) where unique string literals are stored.

When you create a string using a literal, for example:

String s = "hello";

The JVM checks if such a string already exists in the pool. If it does, it returns a reference to the existing object; if not, it creates a new one and puts it in the pool.

This helps save memory and speeds up string comparison (via reference).

If a string is created using new String("hello"), then the object is created in the heap, not in the pool, and references will be different.

To add a string to the pool, you can call the intern() method, which returns the string from the pool if it exists there, or adds it.

Thus, String Pool helps efficiently manage string objects, reducing duplication and improving performance.