Jena read from turtle fails

Question

I have just imported jena libraries to eclipse to work on rdf-s and it is my first try, but I cannot read a turtle (.ttl) file.

I tried it in the following way:

Answer 1

Following Program will read and traverse over the TTL file

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.apache.jena.graph.Triple ;
import org.apache.jena.riot.RDFDataMgr ;
import org.apache.jena.riot.lang.PipedRDFIterator;
import org.apache.jena.riot.lang.PipedRDFStream;
import org.apache.jena.riot.lang.PipedTriplesStream;

public class ReadingTTL
{
    public static void main(String... argv) {
        final String filename = "yagoTransitiveType2.ttl";

        // Create a PipedRDFStream to accept input and a PipedRDFIterator to
        // consume it
        // You can optionally supply a buffer size here for the
        // PipedRDFIterator, see the documentation for details about recommended
        // buffer sizes
        PipedRDFIterator<Triple> iter = new PipedRDFIterator<>();
        final PipedRDFStream<Triple> inputStream = new PipedTriplesStream(iter);

        // PipedRDFStream and PipedRDFIterator need to be on different threads
        ExecutorService executor = Executors.newSingleThreadExecutor();

        // Create a runnable for our parser thread
        Runnable parser = new Runnable() {

            @Override
            public void run() {
                // Call the parsing process.
                RDFDataMgr.parse(inputStream, filename);
            }
        };

        // Start the parser on another thread
        executor.submit(parser);

        // We will consume the input on the main thread here

        // We can now iterate over data as it is parsed, parsing only runs as
        // far ahead of our consumption as the buffer size allows
        while (iter.hasNext()) {
            Triple next = iter.next();
            // Do something with each triple
            System.out.println("Subject:  "+next.getSubject());
            System.out.println("Object:  "+next.getObject());
            System.out.println("Predicate:  "+next.getPredicate());
            System.out.println("\n");
        }
    }

}

Answer 2

The read method you are using assumes that the input format is RDF/XML.

you need to use one of the other read methods.

So it would be:

public static void main(String[] args) throws IOException {
    Model model=ModelFactory.createDefaultModel();
    model.read(new FileInputStream("simpsons.ttl"),null,"TTL");
}