Answer Posted / ashwini choudhari

string class u can't directly the change the string value
and u want to do some manipulation with the string object
then it's give the new memory in stack when u can the do
the manipulation with the string object but in String
Builder class not happened to give the new memory
allocation in stack it just repalcing the some part of
string which u want repalce or appended so that the
performances increases.
Actually String Builder it is referneces type .

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