Duplicate default methods

// Duplicate default methods named abc with the parameters () and () are inherited from the types C and B

abstract class A {

}

interface B {

    default void abc() {
        System.out.println("Interface B");
    }
}

interface C {

    default void abc() {
        System.out.println("Interface C");
    }
}

public class Test extends A implements B, C {

    public static void main(final String[] args) {
        final Test t = new Test();
        t.abc();
    }
}