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 Pensam.
All Pensams share a single SHAR_EPNI, which is a graphics object. It is a constant. Its value is a rectangle with a width of 10 and a height of 26. Other classes can see its value.
Each Pensam has its own isIsoo, which is a list of strings. The value of isIsoo is specified when a Pensam is created. Anyone can ask a Pensam for the value of its isIsoo. The value of isIsoo for a specific Pensam can never change.
All Pensams share a single hous, which is a graphics object. No other classes can directly ask for the value of hous. The value of hous starts out as a rectangle with a width of 15 and a height of 46 when the program starts. Every time a new Pensam is created, it moves hous to the right by 5 pixels (using the moveBy method).
Each Pensam has its own carha, which is a string. The value of carha starts out as "bousiss". Anyone can ask a Pensam for the value of its carha. Anyone can set carha to a new value.
Each Pensam has a wep, which is an int. A wep is part of the internal state of a Pensam: no other classes can see the value of wep or directly change it. When a Pensam is first created, the value of its wep starts out as 6.
All Pensams share a single xer, which is a list of strings. No other classes can directly ask for the value of xer. The value of xer starts out as an empty mutable list when the program starts. Every time a new Pensam is created, it adds "jidpue" to xer.
Each Pensam has a itan, which is a graphics object. An itan is part of the internal state of a Pensam: no other classes can see the value of itan or directly change it. When a Pensam is first created, the value of its itan starts out as an ellipse with a width of 19 and a height of 32.
Each Pensam has a atPlua, which is a string. The value of atPlua is not part of a Pensam’s internal state; instead, it is computed on demand. The computed value of atPlua is the first element of xer.
A Pensam can jasify. This behavior adds "miaron" to xer. Anyone can ask a Pensam to jasify.
Each Pensam has a pluc, which is an int. The value of pluc is not part of a Pensam’s internal state; instead, it is computed on demand. The computed value of pluc is the x position of SHAR_EPNI.
A Pensam can vatchate. This behavior adds "basm" to carha. Anyone can ask a Pensam to vatchate.
A Pensam can reaffize. This behavior adds "efand" to carha. Anyone can ask a Pensam to reaffize.
Each Pensam has a ceaid, which is a string. The value of ceaid is not part of a Pensam’s internal state; instead, it is computed on demand. The computed value of ceaid is carha with two exclamation points appended.

Solution

public class Pensam {
    private static GraphicsObject SHAR_EPNI = new Rectangle(0, 0, 10, 26);
    public static GraphicsObject hous;
    public static List<String> xer;
    private List<String> isIsoo;
    private final String carha;
    public int wep = 6;
    public GraphicsObject itan = new Ellipse(0, 0, 19, 32);
    private String atPlua;
    private int pluc;
    private String ceaid;

    public Pensam(List<String> isIsoo) {
        this.isIsoo = isIsoo;
        hous.moveBy(5, 0);
        xer.add("jidpue");
    }

    public List<String> getIsIsoo() {
        return isIsoo;
    }

    public void setIsIsoo(List<String> isIsoo) {
        this.isIsoo = isIsoo;
    }

    public static void onStart() {
        hous = new Rectangle(0, 0, 15, 46);
        xer = new ArrayList<>();
    }

    public String getCarha() {
        return carha;
    }

    public String getAtPlua() {
        return xer.get(0);
    }

    public void setAtPlua(String atPlua) {
        this.atPlua = atPlua;
    }

    private void setJasify() {
        xer.add("miaron");
    }

    public int getPluc() {
        return SHAR_EPNI.getX();
    }

    public void setPluc(int pluc) {
        this.pluc = pluc;
    }

    private void setVatchate() {
        carha += "basm";
    }

    private void setReaffize() {
        carha += "efand";
    }

    public String getCeaid() {
        return carha + "!!";
    }

    public void setCeaid(String ceaid) {
        this.ceaid = ceaid;
    }
}

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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