Compile error: tag missing in B

super Keyword

AP Computer Science A· difficulty 3/5

public class A {
    public String label() { return "A"; }
    public String tag() { return label(); }
}
public class B extends A {
    public String label() { return "B"; }
}
// Usage:
B b = new B();
System.out.print(b.tag());

What is printed?

A
$Compile error: tag missing in B$
B
$AB$
C
$A$
D
$B$
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Explanation

tag() is inherited and calls label() (this.label()). Dynamic dispatch invokes B's label(), printing "B".

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