What is the use of foo() in java?

Question

Please give me answer with an example.

Answer 1

it is example of name of function or variable if you has not better name and it is not important, especially if you want fast explain some code construction
https://en.m.wikipedia.org/wiki/Foobar

Answer 2

Its just a silly name convention for any function and is void of any inherrent meaning. this tradition should have stopped a long time ago.

Answer 3

It is just a user defined function. Not a predefined function. So it a function named foo by user.