Java tutorial
/* * Copyright 2016 MongoDB, Inc. * * 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 tour; import com.mongodb.BasicDBObject; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBObject; import com.mongodb.MongoClient; import com.mongodb.MongoClientURI; import com.mongodb.QueryBuilder; import org.bson.types.Decimal128; import java.math.BigDecimal; /** * Decimal128 Quick Tour for the Legacy API */ @SuppressWarnings("deprecation") public class Decimal128LegacyAPIQuickTour { /** * Run this main method to see the output of this quick example. * * @param args takes an optional single argument for the connection string */ public static void main(final String[] args) { MongoClient mongoClient; if (args.length == 0) { // connect to the local database server mongoClient = new MongoClient(); } else { mongoClient = new MongoClient(new MongoClientURI(args[0])); } // get handle to "mydb" database DB database = mongoClient.getDB("mydb"); // get a handle to the "test" collection DBCollection collection = database.getCollection("test"); // drop all the data in it collection.drop(); // make a document and insert it BasicDBObject doc = new BasicDBObject("name", "MongoDB").append("amount1", Decimal128.parse(".10")) .append("amount2", new Decimal128(42L)).append("amount3", new Decimal128(new BigDecimal(".200"))); collection.insert(doc); DBObject first = collection .findOne(QueryBuilder.start("amount1").is(new Decimal128(new BigDecimal(".10"))).get()); Decimal128 amount3 = (Decimal128) first.get("amount3"); BigDecimal amount2AsBigDecimal = amount3.bigDecimalValue(); System.out.println(amount3.toString()); System.out.println(amount2AsBigDecimal.toString()); } }