What are the differences between StringBuffer and StringBuilder?

Solution:

The differences between the StringBuffer and StringBuilder is given below.

No. StringBuffer StringBuilder
1) StringBuffer issynchronized , i.e., thread safe. It means two threads can't call the methods of StringBuffer simultaneously. StringBuilder isnon-synchronized ,i.e., not thread safe. It means two threads can call the methods of StringBuilder simultaneously.
2) StringBuffer isless efficient than StringBuilder. StringBuilder ismore efficient than StringBuffer.
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