Java Sample

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To use the gtfs-realtime-bindings Java classes in your own project, you need to add an appropriate dependency. We publish our module to the Maven Central Repository so that it can be easily referenced by Java build tools like Maven, Ivy, and Gradle.

In the dependency snippets below, replace version string X.Y.Z with the latest version available in the Maven Central Repository.

For Maven, add the following to your pom.xml dependencies section:

<dependency>
  <groupId>com.google.transit</groupId>
  <artifactId>gtfs-realtime-bindings</artifactId>
  <version>X.Y.Z</version>
</dependency>

For Gradle, add the following to your build.gradle dependencies section:

compile group: 'org.google.transit', name: 'gtfs-realtime-bindings', version: 'X.Y.Z'

The following code snippet demonstrates downloading a GTFS realtime data feed from a particular URL, parsing it as a FeedMessage (the root type of the GTFS realtime schema), and iterating over the results.

import java.net.URL;

import com.google.transit.realtime.GtfsRealtime.FeedEntity;
import com.google.transit.realtime.GtfsRealtime.FeedMessage;

public class GtfsRealtimeExample {
  public static void main(String[] args) throws Exception {
    URL url = new URL("URL OF YOUR GTFS-REALTIME SOURCE GOES HERE");
    FeedMessage feed = FeedMessage.parseFrom(url.openStream());
    for (FeedEntity entity : feed.getEntityList()) {
      if (entity.hasTripUpdate()) {
        System.out.println(entity.getTripUpdate());
      }
    }
  }
}

For more details, see the Java project page.