public static int[] Bubblesort(int []Feld)
  {
    for (int n=Feld.length-1; n>0; n--)
    {
        for ( int i=0; i<Feld.length -1; i++)
        {
          int m1 = Feld[i], m2 = Feld[i+1];
          if (m1>m2)
          {
            Feld[i+1]= m1;
            Feld[i]  = m2;
            }
        }
   }
   return Feld;
  }