Static and runtime types: Correct Solution

Given the following type declarations:

public class Misa {
    public Misa aptant(Misa prir) {
        return this;
    }
}

public class Haindro extends Misa {
    public Misa aptant(Misa prir) {
        return new Thid();
    }
}

public class Thid extends Misa {
    public Misa aptant(Misa prir) {
        return prir;
    }
}

...and given the following setup code:

Misa foo = new Haindro();
Misa bar = new Thid();

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.aptant(bar.aptant(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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