How to remember difference between StringBuilder and StringBuffer?

Question

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

 

StringBuffer	StringBuilder
Synchronized	Non-Synchronized

 

Answer 1

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.

"StringBu!lder"