Java tutorial
/* * Copyright (c) 2008 - 2013 10gen, Inc. <http://10gen.com> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * */ package org.einherjer.week2.samples; import java.net.UnknownHostException; import java.util.Random; import com.mongodb.BasicDBObject; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBCursor; import com.mongodb.DBObject; import com.mongodb.Mongo; public class FindSample { public static void main(String[] args) throws UnknownHostException { Mongo client = new Mongo(); DB db = client.getDB("course"); DBCollection collection = db.getCollection("findSample"); collection.drop(); // insert 10 documents with a random integer as the value of field "x" for (int i = 0; i < 10; i++) { collection.insert(new BasicDBObject("x", new Random().nextInt(100))); } System.out.println("Find one:"); DBObject one = collection.findOne(); System.out.println(one); System.out.println("\nFind all: "); DBCursor cursor = collection.find(); try { while (cursor.hasNext()) { DBObject cur = cursor.next(); System.out.println(cur); } } finally { cursor.close(); } System.out.println("\nCount:"); long count = collection.count(); System.out.println(count); } }