Java development with MongoDB
To access a MongoDB database from a Java program, you must first download the mongo-java-driver JAR files. You can get them from here:
http://central.maven.org/maven2/org/mongodb/mongo-java-driver/
Choose a recent, stable version; like, 3.4.2. Download the two JAR files: mongo-java-driver-3.4.2.jar
and mongo-java-driver-3.4.2-javadoc.jar
.
The program in Listing 10-2 shows how to use Java to access a Mongo database, in this case our friends
database:

Listing 10-2. Java program to print collection documents
At lines 18-20, we instantiate the three objects necessary to access our relatives
collection: a MongoClient
object, ...
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