String is immutable whereas StringBuffer and StringBuilder can change their values.
The only difference between StringBuffer and StringBuilder is that StringBuilder is unsynchronized whereas StringBuffer is synchronized. So when the
Criteria to choose among String, StringBuffer and StringBuilder
- If your text is not going to change use a string
Class because a Stringobject is immutable. - If your text can change and will only be accessed from a single thread, use a StringBuilder because StringBuilder is unsynchronized.
- If your text can changes, and will be accessed from
multiple threads, use a StringBuffer because StringBuffer is synchronous
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