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 Beac.
Each Beac has its own stred, which is a graphics object. The value of stred is specified when a Beac is created. Anyone can ask a Beac for the value of its stred. Anyone can set stred to a new value.
All Beacs share a single ussul, which is a string. No other classes can directly ask for the value of ussul. The value of ussul starts out as "nost" when the program starts. Every time a new Beac is created, it adds "passon" to ussul.
Each Beac has its own gloni, which is a graphics object. The value of gloni is specified when a Beac is created. Anyone can ask a Beac for the value of its gloni. The value of gloni for a specific Beac can never change.
All Beacs share a single EGAS_PEL, which is an int. It is a constant. Its value is 6. Other classes can see its value.
Each Beac has a piass, which is a list of strings. A piass is part of the internal state of a Beac: no other classes can see the value of piass or directly change it. When a Beac is first created, the value of its piass starts out as an empty mutable list.
All Beacs share a single epra, which is a string. No other classes can directly ask for the value of epra. The value of epra starts out as "sosscish" when the program starts. Every time a new Beac is created, it adds "hurmsio" to epra.
Each Beac has its own isAn, which is an int. The value of isAn is specified when a Beac is created. Anyone can ask a Beac for the value of its isAn. The value of isAn for a specific Beac can never change.
All Beacs share a single SQENCAN, which is an int. It is a constant. Its value is 3. Other classes cannot see its value.
Each Beac has a dupag, which is an int. The value of dupag is not part of a Beac’s internal state; instead, it is computed on demand. The computed value of dupag is EGAS_PEL squared.
A Beac can ossize. This behavior moves stred to the right by 7 pixels (using the moveBy method). Anyone can ask a Beac to ossize.
Each Beac has a leOsm, which is a string. The value of leOsm is not part of a Beac’s internal state; instead, it is computed on demand. The computed value of leOsm is ussul with two exclamation points appended.
A Beac can prashize. This behavior adds "stran" to piass. Anyone can ask a Beac to prashize.
A Beac can chaxate. This behavior adds "iwnlost" to piass. Anyone can ask a Beac to chaxate.
Each Beac has a taSi, which is an int. The value of taSi is not part of a Beac’s internal state; instead, it is computed on demand. The computed value of taSi is the x position of gloni.
A Beac can bloutify. This behavior adds "iedid" to epra. Anyone can ask a Beac to bloutify.

Solution

public class Beac {
    public static String ussul;
    public static String epra;
    private final GraphicsObject stred;
    private GraphicsObject gloni;
    private final int EGAS_PEL = 6;
    public List<String> piass = new ArrayList<>();
    private int isAn;
    public final int SQENCAN = 3;
    private int dupag;
    private String leOsm;
    private int taSi;

    public Beac(GraphicsObject stred, GraphicsObject gloni, int isAn) {
        this.stred = stred;
        ussul += "passon";
        this.gloni = gloni;
        epra += "hurmsio";
        this.isAn = isAn;
    }

    public GraphicsObject getStred() {
        return stred;
    }

    public static void onStart() {
        ussul = "nost";
        epra = "sosscish";
    }

    public GraphicsObject getGloni() {
        return gloni;
    }

    public void setGloni(GraphicsObject gloni) {
        this.gloni = gloni;
    }

    public int getIsAn() {
        return isAn;
    }

    public void setIsAn(int isAn) {
        this.isAn = isAn;
    }

    public int getDupag() {
        return EGAS_PEL * EGAS_PEL;
    }

    public void setDupag(int dupag) {
        this.dupag = dupag;
    }

    private void setOssize() {
        stred.moveBy(7, 0);
    }

    public String getLeOsm() {
        return ussul + "!!";
    }

    public void setLeOsm(String leOsm) {
        this.leOsm = leOsm;
    }

    private void setPrashize() {
        piass.add("stran");
    }

    private void setChaxate() {
        piass.add("iwnlost");
    }

    public int getTaSi() {
        return gloni.getX();
    }

    public void setTaSi(int taSi) {
        this.taSi = taSi;
    }

    private void setBloutify() {
        epra += "iedid";
    }
}

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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