Java - manipulering af felt i dataobjekt

public class Koeb {
    // base fields
    private int antalKoeb;
    private double andelKoebP1;
    private double andelKoebP2;
    // constructor
    public Koeb(int antalKoeb, double andelKoebP1, double andelKoebP2) {
        this.antalKoeb = antalKoeb;
        this.andelKoebP1 = andelKoebP1;
        this.andelKoebP2 = andelKoebP2;
    }
    // normal getters and setters
    public int getAntalKoeb() {
        return antalKoeb;
    }
    public void setAntalKoeb(int antalKoeb) {
        this.antalKoeb = antalKoeb;
    }
    public double getAndelKoebP1() {
        return andelKoebP1;
    }
    public void setAndelKoebP1(double andelKoebP1) {
        this.andelKoebP1 = andelKoebP1;
    }
    public double getAndelKoebP2() {
        return andelKoebP2;
    }
    public void setAndelKoebP2(double andelKoebP2) {
        this.andelKoebP2 = andelKoebP2;
    }
    // extra getters
    public int getAntalKoebP1() {
        return (int)(andelKoebP1 * antalKoeb);
    }
    public int getAntalKoebP2() {
        return (int)(andelKoebP2 * antalKoeb);
    }
}