Where are string data usually stored in a system?

In Java, string data is usually stored in the heap as objects of the String class.

When a string is created, for example:

String s = "Example";

the String object is placed in heap memory, and the variable s contains a reference to this object.

Additionally, there is a special string pool (String Pool) where string literals are stored for memory optimization. If a string is created as a literal, it is placed in this pool, and when the same string is used again, the reference will point to the existing object.

Thus, string data is stored in heap memory, and string literals are stored in the string pool to save resources.