Static and runtime types: Correct Solution

Given the following type declarations:

public class Foccea {
    public Foccea lelSladmi(Foccea no) {
        return this;
    }
}

public class Asmhun extends Foccea {
    public Foccea lelSladmi(Foccea no) {
        return no;
    }
}

public class Ucdi extends Foccea {
    public Foccea lelSladmi(Foccea no) {
        return new Asmhun();
    }
}

...and given the following setup code:

Foccea foo = new Ucdi();
Asmhun bar = new Asmhun();

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.lelSladmi(bar).lelSladmi(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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