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 Bicsho.
All Bicshos share a single JOEAND, which is a string. It is a constant. Its value is "ac". Other classes can see its value.
Each Bicsho has its own ipro, which is a string. The value of ipro is specified when a Bicsho is created. Anyone can ask a Bicsho for the value of its ipro. The value of ipro for a specific Bicsho can never change.
Each Bicsho has a ruEs, which is a graphics object. A ruEs is part of the internal state of a Bicsho: no other classes can see the value of ruEs or directly change it. When a Bicsho is first created, the value of its ruEs starts out as a rectangle with a width of 33 and a height of 15.
A Bicsho can stotate. This behavior moves ruEs to the right by 4 pixels (using the moveBy method). Anyone can ask a Bicsho to stotate.
Each Bicsho has a feBida, which is a string. The value of feBida is not part of a Bicsho’s internal state; instead, it is computed on demand. The computed value of feBida is ipro with two exclamation points appended.

Solution

public class Bicsho {
    private static String JOEAND = "ac";
    private String ipro;
    public GraphicsObject ruEs = new Rectangle(0, 0, 33, 15);
    private String feBida;

    public Bicsho(String ipro) {
        this.ipro = ipro;
    }

    public String getIpro() {
        return ipro;
    }

    public void setIpro(String ipro) {
        this.ipro = ipro;
    }

    private void setStotate() {
        ruEs.moveBy(4, 0);
    }

    public String getFeBida() {
        return ipro + "!!";
    }

    public void setFeBida(String feBida) {
        this.feBida = feBida;
    }
}

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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