Static and runtime types: Correct Solution

Given the following type declarations:

public class Phiss {
    public Phiss phuuaw(Phiss acin) {
        return this;
    }
}

public class BreIvest extends Phiss {
    public Phiss phuuaw(Phiss acin) {
        return acin;
    }
}

public class Whosci extends Phiss {
    public Phiss phuuaw(Phiss acin) {
        return new Whosci();
    }
}

...and given the following setup code:

Phiss foo = new Whosci();
BreIvest bar = new BreIvest();

Part 1

Draw an AST for the following expression, labeling the static type (a.k.a. compile-time type) of each node in the tree:

foo.phuuaw(bar).phuuaw(bar)

(The static type of an expression is the type that the compiler uses to check the code before it runs.)

Solution

Part 2

Draw an AST for the same expression, this time labeling the runtime type of each node in the tree.

(The runtime type of an expression is the type of the actual value that appears when the code runs.)

Solution

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• Static and runtime types: Correct Solution (wtqv-3r2w-yc63-mhii)
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