import java.util.Arrays;

public class ObjectVergleich {

    public static void main(String[] args) {
        Moped m1 = new Moped("BMW", "RS 54", 58);
        Moped m2 = new Moped("Moto Guzzi", "Falcone Sport", 23);
        Moped m3 = new Moped("AJS", "7R", 45);
        Moped m4 = new Moped("Moto Guzzi", "V8", 72);
        Moped m5 = new Moped("Böhmerland", "Tourer", 16);
        Moped m6 = new Moped("Moto Guzzi", "Falcone Tourismo", 19);

        Moped[] moped = { m1, m2, m3, m4, m5, m6 };
        Arrays.sort(moped);
        for (Moped m : moped) {
            if (m != null) {
                System.out.println(m.toString());
            }
        }
    }
}

class Moped implements Comparable<Object> {
    String hersteller;
    String typ;
    int ps;

    public Moped(String hersteller, String typ, int ps) {
        this.hersteller = hersteller;
        this.typ = typ;
        this.ps = ps;
    }

    public int compareTo(Object m) {
        if (this == (Moped) m) {
            return 0;
        }
        if (m instanceof Moped) {
            Moped einMoped = (Moped) m;

            if (this.getHersteller() == null) {
                return 1;
            }
            if (einMoped.getHersteller() == null) {
                return -1;
            }
            if (this.getHersteller().equals(einMoped.getHersteller())) {
                if (this.getTyp() == null) {
                    return 1;
                }
                if (einMoped.getTyp() == null) {
                    return -1;
                }
                if (this.getTyp().equals(einMoped.getTyp())) {
                    return this.getPS() - einMoped.getPS();  // Vorsicht!
                }
                return this.getTyp().compareTo(einMoped.getTyp());
            }
            return this.getHersteller().compareTo(einMoped.getHersteller());
        }
        return -1;
    }

    public String getHersteller() {
        return hersteller;
    }

    public String getTyp() {
        return typ;
    }

    public int getPS() {
        return ps;
    }
    
    @Override
    public String toString() {
        return "Moped [ Hersteller:" + getHersteller() + " Typ:" + getTyp()
                + " PS:" + getPS() + " ]";
    }
}