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 a = "ABC";
String b = new String("ABC");
String c = "ABC";

a == b // false
a == c // true

a.equals(b) // true
a.equals(c) // true

The point is that a & c point to the same "ABC" object (JVM magic). Using "new String" creates a new object each time. IMO, using string object is a disadvantage, not an advantage. However, as another poster said, string object is useful for converting byte[], char[], StringBuffer - if you need to do that.