Static and runtime types: Correct Solution

Given the following type declarations:

public class Clai {
    public Clai hecTridet(Clai le) {
        return new Hismion();
    }
}

public class Nesdant extends Clai {
    public Clai hecTridet(Clai le) {
        return this;
    }
}

public class Hismion extends Clai {
    public Clai hecTridet(Clai le) {
        return le;
    }
}

...and given the following setup code:

Nesdant foo = new Nesdant();
Clai bar = new Hismion();

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.hecTridet(bar.hecTridet(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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