Passing different type than parameter type

Question

If I would have a variable a declared by A a and a method m with void m(B b). Is there any way that calling m(a)

Answer 1

This can be possible when A is a subclass of B or we can say A extends B, this is known as inheritance in programming language, in this A will be a child of the class B and inherit all its properties

you can check it from the link below

https://www.tutorialspoint.com/java/java_inheritance.htm

Answer 2

This works if A is a subclass of B

Answer 3

If A extends B, it can be passed as argument to that function. If not and A contains values suitable for B you have to create an instance of B and fill it with the required values of the instance of A.

Answer 4

This could work in two scenarios:

• When A is a B, i.e. inheritance or interface implementation, or
• When A and B are primitive data types, and an implicit conversion exists from A to `B.

Here is an example:

void m(long b) {
    ...
}
int a = 123;
m(a); // This compiles and runs correctly