What does @ means in java??

Answer 1

Are they annotations used for Javadoc documentation?

Answer 2

https://stackoverflow.com/questions/31822020/in-java-what-does-the-symbol-mean
https://stackoverflow.com/questions/19551022/the-symbol-in-java#
https://www.quora.com/What-is-the-use-of-the-symbol-in-Java-programs

Answer 3

Sonic yes they can be used in Javadoc annotations to say the thing you are documenting

e.g @param for a parameter

but a non-commented Java line of code with an @ - i.e. not in Javadocs - are annotations: very useful to tie extra code/meaning to a field or class.

e.g. In a JUnit test class, the annotation @Before on a method is to reflect that this method needs to be run before any tests are executed - this saves me having to manually put such method calls in test methods

I haven’t looked at the links Khalid Saifullah Fuad has shared but I’m sure they will cover examples too