Difference between revisions of "Java Examples"

From Info216
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==Lecture 2: RDF==
 
==Lecture 2: RDF==
 +
 +
 +
===Contents of '''test.ttl'''===
 +
<nowiki>
 +
<http://no.uib.infomedia.info216/Cade_Tracy>
 +
        <http://no.uib.infomedia.info216/visited>
 +
                <http://dbpedia.org/resource/France> , <http://dbpedia.org/resource/Canada> ;
 +
        <http://xmlns.com/foaf/0.1/name>
 +
                "Cade Tracy" .
 +
 +
<http://dbpedia.org/resource/France>
 +
        <http://www.w3.org/2000/01/rdf-schema#label>
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                "Francia"@es , "France"@en , "Frankrike"@no ;
 +
        <http://dbpedia.org/resource/ontology/populationEstimate>
 +
                66644000.0 .
 +
</nowiki>
  
 
===Reading from file===
 
===Reading from file===
 +
<nowiki>
 
package no.uib.infomedia.sinoa.info216;
 
package no.uib.infomedia.sinoa.info216;
  
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}
 
}
 
}
 
}
 +
</nowiki>
  
 
===Reading from web resource===
 
===Reading from web resource===

Revision as of 13:22, 19 January 2017

Here are the code examples we have used in the live sessions during the lectures - along with a few additional ones.

Lecture 1: Java, Jena

HelloJena.java

package no.uib.sinoa.info216;

import org.apache.jena.rdf.model.Model;
import org.apache.jena.rdf.model.ModelFactory;
import org.apache.jena.rdf.model.Resource;
import org.apache.jena.vocabulary.FOAF;

public class HelloJena {

	public static void main(String[] args) {
		
		Model model = ModelFactory.createDefaultModel();
		
		Resource andreas = model.createResource("http://no.uib.infomedia.info216.ex/CadeTracy");
		andreas.addLiteral(FOAF.name, "Cade Tracy");
		
		model.write(System.out, "TURTLE");
	}	
}
 

Lecture 2: RDF

Contents of test.ttl

<http://no.uib.infomedia.info216/Cade_Tracy>
        <http://no.uib.infomedia.info216/visited>
                <http://dbpedia.org/resource/France> , <http://dbpedia.org/resource/Canada> ;
        <http://xmlns.com/foaf/0.1/name>
                "Cade Tracy" .

<http://dbpedia.org/resource/France>
        <http://www.w3.org/2000/01/rdf-schema#label>
                "Francia"@es , "France"@en , "Frankrike"@no ;
        <http://dbpedia.org/resource/ontology/populationEstimate>
                66644000.0 .
 

Reading from file

package no.uib.infomedia.sinoa.info216;

import java.io.FileInputStream;

import org.apache.jena.rdf.model.Model;
import org.apache.jena.rdf.model.ModelFactory;

public class ReadJena {

	public static void main(String[] args) {
		Model model = ModelFactory.createDefaultModel();
		
		try {
			model.read(new FileInputStream("test.ttl"), "http://ex.org/", "TURTLE");
		} catch (Exception e) {
			// TODO: handle exception
		}
		
		model.write(System.out);
	}
}
 

Reading from web resource

INFO216, UiB, Spring 2017, Prof. Andreas L. Opdahl (c)