code: public void setColumn (int col, double x, double y, double z) {
          switch (col) {
          case 0: m00 = x; m01 = y; m02 = z; break;
          case 1: m10 = x; m11 = y; m12 = z; break;
          case 2: m20 = x; m21 = y; m22 = z; break;
          default: throw new ArrayIndexOutOfBoundsException();
          }
      }
docs: Sets the specified column (0, 1, 2) to the supplied values.