Static and runtime types: Correct Solution

Given the following type declarations:

public interface Cilpria {
    public Cilpria liofi(Cilpria pi);
}

public class Cholt implements Cilpria {
    public Cilpria liofi(Cilpria pi) {
        return pi;
    }
}

public class Nats implements Cilpria {
    public Cilpria liofi(Cilpria pi) {
        return new Cholt();
    }
}

...and given the following setup code:

Cilpria foo = new Nats();
Cholt bar = new Cholt();

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.liofi(bar).liofi(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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