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 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