code: public static SimpleFeatureCollection featureCollectionFromGeometry( CoordinateReferenceSystem crs, Geometry... geometries ) {
          SimpleFeatureTypeBuilder b = new SimpleFeatureTypeBuilder();
          b.setName("simplegeom");
          b.setCRS(crs);
  
          DefaultFeatureCollection newCollection = new DefaultFeatureCollection();
  
          EGeometryType geometryType = EGeometryType.forGeometry(geometries[0]);
          b.add("the_geom", geometryType.getClazz());
  
          Object userData = geometries[0].getUserData();
          int userDataSize = 1;
          if (userData != null) {
              if (userData instanceof String[]) {
                  String[] string = (String[]) userData;
                  userDataSize = string.length;
                  for( int i = 0; i < userDataSize; i++ ) {
                      b.add("data" + i, String.class);
                  }
              } else {
                  b.add("userdata", userData.getClass());
              }
          }
  
          SimpleFeatureType type = b.buildFeatureType();
          SimpleFeatureBuilder builder = new SimpleFeatureBuilder(type);
          for( Geometry g : geometries ) {
              Object[] values;
              if (userData == null) {
                  values = new Object[]{g};
              } else {
                  Object tmpUserData = g.getUserData();
                  if (tmpUserData instanceof String[]) {
                      String[] string = (String[]) tmpUserData;
                      values = new Object[userDataSize + 1];
                      values[0] = g;
                      for( int i = 0; i < string.length; i++ ) {
                          values[i + 1] = string[i];
                      }
                  } else {
                      values = new Object[]{g, tmpUserData};
                  }
              }
              builder.addAll(values);
              SimpleFeature feature = builder.buildFeature(null);
              newCollection.add(feature);
          }
          return newCollection;
      }
docs: Make a {@link SimpleFeatureCollection} from a set of {@link Geometry}.
  
  <p>This is a fast utility and adds no attributes.</p>
  
  @param crs The {@link CoordinateReferenceSystem}.
  @param geometries the set of {@link Geometry} to add.
  @return the features wrapping the geoms.