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Do methods need to declare the type of return variables?
Returning a Value from a Method Java requires that a method declare the data type of the value that it returns. If a method does not return a value, it must be declared to return void .
Do class methods have to specify a return type?
Yes, you always have to specify the method return type. The reason you have to do so is because Java is strongly and statically typed, which means that the compiler has to know the types of all expressions during compile time.
What is a method list the two types of methods?
There are two types of instance method: Accessor Method. Mutator Method.
Is Boolean a python?
Python boolean type is one of the built-in data types provided by Python, which represents one of the two values i.e. True or False. Generally, it is used to represent the truth values of the expressions. For example, 1== 0 is True whereas 2<1 is False.
What happens if a method does not return a value?
If a method does not return a value, it must be declared to return void . Methods can return either values of primitive data types or of reference data types. The isEmpty () method in the Stack class returns a primitive data type, a boolean value:
How to specify method return type list of?
With Python 3.6, the built-in typing package will do the job. from typing import List def validate (self, item:dict, attrs:dict)-> List [str]: The notation is a bit weird, since it uses brackets but works out pretty well. Edit: With the new 3.9 version of Python, you can annotate types without importing from the typing module.
Is it possible to return a specific type?
Changing the return value type to a more generic one puts too many restrictions to the method consumers. In the worst case, the client code would need to manually cast the Person object to an Employee, so it is better to not make them do that. It is not always possible to return a value of a specific type (e.g. Employee or Customer).
Can a method declare to return an integer?
The data type of the value returned by the return statement must match the data type that the method claims to return; you can’t return an Object from a method declared to return an integer. When returning an object, the returned object’s data type must be either a subclass of or the exact class indicated.