Class declarations and object modeling: Correct Solution

Translate the specification below into an idiomatic Java class definition.

(In this context, "idiomatic" means following the common style and conventions of the language.)

One kind of thing that exists in our model is a Sothvi.
Each Sothvi has its own poper, which is a graphics object. The value of poper starts out as a rectangle with a width of 49 and a height of 36. Anyone can ask a Sothvi for the value of its poper. Anyone can set poper to a new value.
Each Sothvi has a nidir, which is a list of strings. A nidir is part of the internal state of a Sothvi: no other classes can see the value of nidir or directly change it. When a Sothvi is first created, the value of its nidir starts out as an empty mutable list.
Each Sothvi has its own duir, which is a string. The value of duir is specified when a Sothvi is created. Anyone can ask a Sothvi for the value of its duir. The value of duir for a specific Sothvi can never change.
All Sothvis share a single cio, which is a list of strings. No other classes can directly ask for the value of cio. The value of cio starts out as an empty mutable list when the program starts. Every time a new Sothvi is created, it adds "pleron" to cio.
All Sothvis share a single ASME_ZUEN, which is a string. It is a constant. Its value is "esm". Other classes cannot see its value.
A Sothvi can fronify. This behavior adds "osbeth" to nidir. Anyone can ask a Sothvi to fronify.
Each Sothvi has a cloc, which is an int. The value of cloc is not part of a Sothvi’s internal state; instead, it is computed on demand. The computed value of cloc is the size of nidir.
Each Sothvi has a rass, which is a string. The value of rass is not part of a Sothvi’s internal state; instead, it is computed on demand. The computed value of rass is the first element of cio.
A Sothvi can shiorate. This behavior adds "saceng" to nidir. Anyone can ask a Sothvi to shiorate.

Solution

public class Sothvi {
    public static List<String> cio;
    public static String ASME_ZUEN = "esm";
    private final GraphicsObject poper;
    public List<String> nidir = new ArrayList<>();
    private String duir;
    private int cloc;
    private String rass;

    public Sothvi(String duir) {
        this.duir = duir;
        cio.add("pleron");
    }

    public GraphicsObject getPoper() {
        return poper;
    }

    public String getDuir() {
        return duir;
    }

    public void setDuir(String duir) {
        this.duir = duir;
    }

    public static void onStart() {
        cio = new ArrayList<>();
    }

    private void setFronify() {
        nidir.add("osbeth");
    }

    public int getCloc() {
        return nidir.size();
    }

    public void setCloc(int cloc) {
        this.cloc = cloc;
    }

    public String getRass() {
        return cio.get(0);
    }

    public void setRass(String rass) {
        this.rass = rass;
    }

    private void setShiorate() {
        nidir.add("saceng");
    }
}

Things to check in your solution:

Is every public and private modifier correct?
Are the correct items static?
Are the correct items final?
Are all the variable types and method return types correct?
Are the class members in the correct order? It should be: (1) static variables, (2) instance variables, (3) constructors, (4) methods.
Do members have the correct capitalization?

Acceptable variations in the solution:

It is OK if you initialized non-static variables in the constructor instead of in the declaration. (Ask your instructor if you aren’t clear what this means.) Note that static variables must be initialized in the declaration.
It is OK if you used a slightly different but equivalent form of an expression, such as += 1 instead of ++.

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