What happens if Class A inherits Class B, implements interface C, and Class B and interface C define variables of the same name? (instantaneous)

Source: Internet
Author: User

What happens if Class A inherits Class B, implements interface C, and Class B and interface C define variables with the same name. (instantaneous)


Interface A

{
int x = 0;
}
Class B

{
int x = 1;
}
Class C extends B implements A

{
public void PX ()

{
SYSTEM.OUT.PRINTLN (x);
}
public static void Main (string[] args) {
New C (). PX ();
}
}
Answer: Error. An error occurs at compile time (the error describes different JVMs with different information, meaning an ambiguous x call, two x matches (as if you were declaring the date directly when you import Java.util and java.sql two packets at the same time). For a variable of the parent class, you can use super.x to make it explicit (the output is 1), and the properties of the interface are implicitly public static final. So you can use a.x to make it clear (the output is 0).

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