Static and runtime types: Correct Solution

Given the following type declarations:

public interface Ildtoun {
    public Ildtoun deblo(Ildtoun en);
}

public class Lobiss implements Ildtoun {
    public Ildtoun deblo(Ildtoun en) {
        return new Maldxox();
    }
}

public class Maldxox implements Ildtoun {
    public Ildtoun deblo(Ildtoun en) {
        return this;
    }
}

...and given the following setup code:

Ildtoun foo = new Lobiss();
Maldxox bar = new Maldxox();

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.deblo(bar).deblo(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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