Static and runtime types: Correct Solution

Given the following type declarations:

public interface IasDardess {
    public IasDardess probur(IasDardess pric);
}

public class Slined implements IasDardess {
    public IasDardess probur(IasDardess pric) {
        return new Slined();
    }
}

public class Gatae implements IasDardess {
    public IasDardess probur(IasDardess pric) {
        return pric;
    }
}

...and given the following setup code:

Gatae foo = new Gatae();
Slined bar = new Slined();

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.probur(foo.probur(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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