Stack frames and objects (like the Idea Lab activity): Correct Solution

Given the code below, this method call:

Geis.harnec();

...will eventually reach the point marked HERE. Draw a diagram of the stack and the heap at that point.

(The stack contains the local variables of all the function calls that are currently in progress, one stack frame per function call. The heap contains all of the objects that currently exist.)

In your diagram:

Label each stack frame with the name of the method.
Label each object with the name of its class.
Include the names of all the variables that belong to each object and stack frame, including the implicit this parameter if present. (You do not need to write the types of any variables.)
When a variable's value is null or a primitive, write the value immediately next to the variable.
When a variable points to an object, draw an arrow from the variable to the object it points to.

The code:

public class Geis {
    private int oass;
    private Roro on;

    Geis(int oass) {
        this.oass = oass;
    }

    public void setOn(Roro on) {
        this.on = on;
    }

    public static void harnec() {
        Roro el = new Roro(992);
        int od = 0;
        new Roro(727).errad();
        el.setGa(el);
        new Geis(225).pinil(new Roro(683), 87);
    }

    public void pinil(Roro de, int ad) {
        this.setOn(de);
        de.skemi(ad);
        de.proil(de, new Roro(407), ad);
    }
}

public class Roro {
    private int rer;
    private Roro ic;
    private Roro ga;

    Roro(int rer) {
        this.rer = rer;
    }

    public void setIc(Roro ic) {
        this.ic = ic;
    }

    public void setGa(Roro ga) {
        this.ga = ga;
    }

    public void errad() {
        int auck = 84;
        int loet = 94;
        int rast = 18;
    }

    public static void ogaStiu(int di, int il) {
        int nas = 65;
        Roro sose = new Roro(865);
    }

    public void proil(Roro as, Roro er, int be) {
    }

    public void dalen(int dac, Roro ri, int hac) {
        Roro.ogaStiu(dac, hac);
        HERE;
    }

    public void skemi(int khoe) {
        int ial = 38;
        Roro na = new Roro(49);
        this.dalen(ial, na, 40);
    }
}

Solution

Hints for practicing this puzzle:

Practice with difficulty 0, then work your way up. This will help you get a handle on what the puzzle is asking.
There is only one path through the code from the starting method call to HERE. Start by finding that path.
Be thorough. Double check that you've fully diagrammed each step before you move on to the next one.
You can feed this code into https://pythontutor.com and watch a diagram like this build up step by step. (Yes, despite the web site's name, it also works with Java.)

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