What are the differences between String, StringBuffer, and StringBuilder in java?

Published: December 10, 2019Last updated: March 14, 2020string, StringBuffer, StringBuilder

All Java developers use the string in every day’s coding. It is impossible to pass days as a developer without using the Java String class. We also have StringBuffer and StringBuilder classes in Java. Following are some differences of String, StringBuffer and StringBuilder:

#	String	StringBuffer	StringBuilder
1	String is immutable	StringBuffer is mutable	StringBuilder is mutable
2	String is thread-safe	StringBuffer is thread-safe	StringBuilder is not thread-safe
3	String is fast	StringBuffer is very slow	StringBuilder is fast
4	String storage area is constant string pool	StringBuffer storage area is heap	StringBuilder storage area is heap

We should prefer StringBuilder in all cases where we have only a single thread accessing the object.

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