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How can I remember about thread safety in StringBuilder and StringBuffer without getting confused with each other.


StringBuffer StringBuilder
Synchronized Non-Synchronized


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Here is an easy trick to remember it.

Only StringBuilder has the letter 'i' in it . If you put the letter 'i' upside down, it becomes '!' - equivalent to 'not' symbol in programming languages.

Hence 'StringBuilder' can be related with the word 'not' which can help you remember -> non-synchronized.

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