@param will not affect testNumber.It is a Javadoc comment - i.e used for generating documentation .
You can put a Javadoc comment immediately before a class, field, method, constructor, or interface such as @param, @return .
Generally begins with '@' and must be the first thing on the line.
The Advantage of using @param is :-
By creating simple Java classes that contain attributes and some custom Javadoc tags, you allow those classes to serve as a simple metadata description for code generation.
/*
*@param testNumber
*@return integer
*/
public int main testNumberIsValid(int testNumber){
if (testNumber < 6) {
//Something
}
}
Whenever in your code if you reuse testNumberIsValid method, IDE will show you the parameters the method accepts and return type of the method.