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

Given the code below, this method call:

Plelo.unes();

...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 Plelo {
    private int repo;
    private Plelo fi;
    private Trint eph;

    Plelo(int repo) {
        this.repo = repo;
    }

    public void setFi(Plelo fi) {
        this.fi = fi;
    }

    public void setEph(Trint eph) {
        this.eph = eph;
    }

    public static void nioTropra(Plelo asm, Plelo ptue, Plelo thes) {
        thes.setFi(asm);
        new Plelo(451).xesAssve(70);
    }

    public void xesAssve(int beis) {
        Plelo.oess(beis, this);
        Trint.bestot(this, new Trint(616), beis);
        Plelo.isrhad(this, beis, this);
    }

    public static void unes() {
        new Plelo(361).ecma();
        Plelo.nioTropra(new Plelo(397), new Plelo(970), new Plelo(332));
    }

    public static void oess(int ai, Plelo cois) {
        Plelo zam = new Plelo(276);
        Plelo lemo = new Plelo(134);
    }

    public void ecma() {
        Plelo urfo = new Plelo(625);
        int scli = 67;
        int ha = 6;
    }

    public static void isrhad(Plelo toc, int tred, Plelo pu) {
    }
}

public class Trint {
    private int irbu;
    private Trint cita;

    Trint(int irbu) {
        this.irbu = irbu;
    }

    public void setCita(Trint cita) {
        this.cita = cita;
    }

    public static void bestot(Plelo ecoc, Trint purb, int be) {
        int sual = 73;
        ecoc.setFi(ecoc);
        HERE;
    }
}

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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