Object Superclass

AP Computer Science A· difficulty 3/5

public class W {
    private int x;
    public W(int x) { this.x = x; }
    public boolean equals(W o) {
        return o.x == this.x;
    }
}
// ...
W a = new W(5);
Object o = new W(5);
System.out.println(a.equals(o));

What is printed?

A
$false$
check_circle
B
$true$
C
$5$
D
$Compile-time error$

Explanation

The custom equals(W) does not override Object.equals(Object); when called with an Object reference the inherited equals (reference comparison) is used, returning false.

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