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 an Iost.
All Iosts share a single CHRETI, which is a string. It is a constant. Its value is "i". Other classes cannot see its value.
All Iosts share a single uss, which is a string. No other classes can directly ask for the value of uss. The value of uss starts out as "berd" when the program starts. Every time a new Iost is created, it adds "scuert" to uss.
Each Iost has its own trang, which is an int. The value of trang is specified when a Iost is created. Anyone can ask an Iost for the value of its trang. The value of trang for a specific Iost can never change.
Each Iost has a duTior, which is a graphics object. A duTior is part of the internal state of an Iost: no other classes can see the value of duTior or directly change it. When an Iost is first created, the value of its duTior starts out as a rectangle with a width of 27 and a height of 48.
Each Iost has its own ilBipri, which is a list of strings. The value of ilBipri starts out as an empty mutable list. Anyone can ask an Iost for the value of its ilBipri. Anyone can set ilBipri to a new value.
Each Iost has its own leVordi, which is a string. The value of leVordi is specified when a Iost is created. Anyone can ask an Iost for the value of its leVordi. The value of leVordi for a specific Iost can never change.
Each Iost has a baEnta, which is an int. The value of baEnta is not part of an Iost’s internal state; instead, it is computed on demand. The computed value of baEnta is trang plus 7.
An Iost can heanate. This behavior moves duTior to the right by 2 pixels (using the moveBy method). Anyone can ask an Iost to heanate.
An Iost can hoshate. This behavior adds "erptus" to uss. Anyone can ask an Iost to hoshate.
Each Iost has a esWrod, which is a string. The value of esWrod is not part of an Iost’s internal state; instead, it is computed on demand. The computed value of esWrod is CHRETI with two exclamation points appended.
Each Iost has a ehut, which is an int. The value of ehut is not part of an Iost’s internal state; instead, it is computed on demand. The computed value of ehut is the size of ilBipri.

Solution

public class Iost {
    public static String CHRETI = "i";
    public static String uss;
    private int trang;
    public GraphicsObject duTior = new Rectangle(0, 0, 27, 48);
    private final List<String> ilBipri;
    private String leVordi;
    private int baEnta;
    private String esWrod;
    private int ehut;

    public Iost(int trang, String leVordi) {
        uss += "scuert";
        this.trang = trang;
        this.leVordi = leVordi;
    }

    public static void onStart() {
        uss = "berd";
    }

    public int getTrang() {
        return trang;
    }

    public void setTrang(int trang) {
        this.trang = trang;
    }

    public List<String> getIlBipri() {
        return ilBipri;
    }

    public String getLeVordi() {
        return leVordi;
    }

    public void setLeVordi(String leVordi) {
        this.leVordi = leVordi;
    }

    public int getBaEnta() {
        return trang + 7;
    }

    public void setBaEnta(int baEnta) {
        this.baEnta = baEnta;
    }

    private void setHeanate() {
        duTior.moveBy(2, 0);
    }

    private void setHoshate() {
        uss += "erptus";
    }

    public String getEsWrod() {
        return CHRETI + "!!";
    }

    public void setEsWrod(String esWrod) {
        this.esWrod = esWrod;
    }

    public int getEhut() {
        return ilBipri.size();
    }

    public void setEhut(int ehut) {
        this.ehut = ehut;
    }
}

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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