what is the advantage of string object as compared to string literal

Question

i want to know where to use string object(in which scenario in my java code). ok i understood the diff btwn string literal and string object, but i want to know that since

Answer 1

String literals are converted to String objects, and as others pointed out, creating explicit String objects is unnecessary and inperformant, as it defeats String pooling.

However, there is one situation where you want to create new Strings explicitly: If you use just a small part of a very long String. String.substring() prevents the original String from getting GC'd, so you can save memory when you write

String s = new String(veryLongString.substring(1,3));

instead of

String s = veryLongString.substring(1,3);