Starting development with Neo4j - Neo4j in Action - page 55

The GraphDatabaseService.createNode() method creates the node in the

Neo4j database . This method returns the created node itself, which you can use to in-
spectitspropertiesortomanipulatethenodefurther.Intheprecedinglistings,you'reusing
the returned node instance to print the internal ID of the node as generated by the Neo4j

database .

You've now seen the creation of a single user node, but because you're creating a social
network, you'll need a few more users. The following listing creates three more users.

Listing 3.3. Creating multiple nodes in a single transaction

try (Transaction tx = graphDb.beginTx()) {
Node user1 = graphDb.createNode();
logger.info("created user:"+user1.getId());
Node user2 = graphDb.createNode();
logger.info("created user:"+user2.getId());
Node user3 = graphDb.createNode();
logger.info("created user:"+user3.getId());
tx.success();

}

After the operations from listing 3.3 , your graph will look exactly like figure 3.7 , both in
the object model and on disk, using the Neo4j graph database storage.

The next step is to connect the created user nodes using relationships.

3.2.2. Creating relationships

Before you start implementing relationships to connect users as friends, remind yourself of
the model diagram in figure 3.2 , shown again here as figure 3.8 .