Re: [Geotools-gt2-users] How to add polygons on existing map?

[starscream <ni...@ho...>]

I edited the method "citiesLayer" in this way, but it doesn't work:

public static FeatureLayer getCitiesLayer() throws ParseException{
		
	GeometryFactory geometryFactory = JTSFactoryFinder.getGeometryFactory();
	ArrayList<SimpleFeature> features = new ArrayList<SimpleFeature>();
				
	// Simple point coordinates
        float lat = (float) 508469.7040;
        float lng = (float) 4358409.7367;
		
        SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder();
        builder.setName("Location");
        builder.setCRS(DefaultGeographicCRS.WGS84); // <- Coordinate
reference system

        // add attributes in order
        builder.add("Location", Point.class);
        builder.length(15).add("Name", String.class); // <- 15 chars width
for name field

        // build the type
        final SimpleFeatureType TYPE = builder.buildFeatureType();
        
        SimpleFeatureBuilder featureBuilder = new
SimpleFeatureBuilder(TYPE);
        
        Point point = geometryFactory.createPoint(new Coordinate(lng, lat));
        featureBuilder.add(point);
        featureBuilder.add("Cagliari");
        featureBuilder.add("12");
        SimpleFeature feature = featureBuilder.buildFeature(null);
        features.add(feature);

	Style style = SLD.createPointStyle("Star", Color.BLUE, Color.BLUE, 0.3f,
30);

	FeatureLayer citiesLayer = new FeatureLayer((FeatureSource)
features,(org.geotools.styling.Style) style);
        citiesLayer.setTitle("Cities layer");
	return citiesLayer;
}

It gives me this error:

java.lang.ArrayIndexOutOfBoundsException: Can handle 2 attributes only,
index is 2
	at
org.geotools.feature.simple.SimpleFeatureBuilder.set(SimpleFeatureBuilder.java:293)
	at
org.geotools.feature.simple.SimpleFeatureBuilder.add(SimpleFeatureBuilder.java:220)

	at GISDemo.getCitiesLayer(GISDemo.java:101)

The row 101 is this:  featureBuilder.add(12);


I dont't understamd why...




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