Creation of the Topic for HelloPublisher

HelloPublisherTopicCreation.java

// Create the topic "Hello World" with the built-in String type    
Topic helloWorldTopic = participant.create_topic(
	"Hello, World",				//topic_name
	StringTypeSupport.get_type_name(),	//type_name
	DomainParticipant.TOPIC_QOS_DEFAULT,	//QoS
	null,					//listener
	StatusKind.STATUS_MASK_NONE);		//mask	
if (topic == null) {
	System.err.println("Unable to create topic.");
	return;
}