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

Given the code below, this method call:

Tades.pelrir();

...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 Tades {
    private int ganri;
    private Tades hisa;

    Tades(int ganri) {
        this.ganri = ganri;
    }

    public void setHisa(Tades hisa) {
        this.hisa = hisa;
    }

    public static void pelrir() {
        int acge = 29;
        int otol = 38;
        Tades.sitra(new Tades(397), acge);
        Cahen.fuscon(otol, acge, acge);
    }

    public void ciik(Tades bru, Tades fecs, int me) {
    }

    public static void sitra(Tades de, int wo) {
        Tades te = new Tades(588);
        te.setHisa(de);
        new Cahen(132).troc(new Cahen(61), wo, de);
        te.ernue(de, te, wo);
    }

    public void ernue(Tades mepi, Tades ia, int iuma) {
    }
}

public class Cahen {
    private int toSqa;
    private Cahen ar;
    private Cahen nur;

    Cahen(int toSqa) {
        this.toSqa = toSqa;
    }

    public void setAr(Cahen ar) {
        this.ar = ar;
    }

    public void setNur(Cahen nur) {
        this.nur = nur;
    }

    public void erpo(Tades wuil, Tades ispe) {
        int hi = 26;
        ispe.ciik(wuil, ispe, hi);
        HERE;
    }

    public static void fuscon(int scel, int rul, int se) {
    }

    public void troc(Cahen es, int oss, Tades el) {
        es.setNur(this);
        this.erpo(el, new Tades(922));
    }
}

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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