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import java.net.UnknownHostException;
 
import com.journaldev.mongodb.model.User;
import com.mongodb.BasicDBObjectBuilder;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.MongoClient;
import com.mongodb.WriteResult;
 
class MongoDBExample {
 
	public static void main(String[] args) throws UnknownHostException {
 
		User user = createUser();
		DBObject doc = createDBObject(user);
 
		MongoClient mongo = new MongoClient("localhost", 27017);
		DB db = mongo.getDB("journaldev");
 
		DBCollection col = db.getCollection("users");
 
		//create user
		WriteResult result = col.insert(doc);
		System.out.println(result.getUpsertedId());
		System.out.println(result.getN());
		System.out.println(result.isUpdateOfExisting());
		System.out.println(result.getLastConcern());
 
		//read example
		DBObject query = BasicDBObjectBuilder.start().add("_id", user.getId()).get();
		DBCursor cursor = col.find(query);
		while(cursor.hasNext()){
			System.out.println(cursor.next());
		}
 
		//update example
		user.setName("Pankaj Kumar");
		doc = createDBObject(user);
		result = col.update(query, doc);
		System.out.println(result.getUpsertedId());
		System.out.println(result.getN());
		System.out.println(result.isUpdateOfExisting());
		System.out.println(result.getLastConcern());
 
		//delete example
		result = col.remove(query);
		System.out.println(result.getUpsertedId());
		System.out.println(result.getN());
		System.out.println(result.isUpdateOfExisting());
		System.out.println(result.getLastConcern());
 
		//close resources
		mongo.close();
	}
 
	private static DBObject createDBObject(User user) {
		BasicDBObjectBuilder docBuilder = BasicDBObjectBuilder.start();
 
		docBuilder.append("_id", user.getId());
		docBuilder.append("name", user.getName());
		docBuilder.append("role", user.getRole());
		docBuilder.append("isEmployee", user.isEmployee());
		return docBuilder.get();
	}
 
	private static User createUser() {
		User u = new User();
		u.setId(2);
		u.setName("Pankaj");
		u.setEmployee(true);
		u.setRole("CEO");
		return u;
	}
 
 
 
}

Main.java:3: error: package com.journaldev.mongodb.model does not exist
import com.journaldev.mongodb.model.User;
                                   ^
Main.java:4: error: package com.mongodb does not exist
import com.mongodb.BasicDBObjectBuilder;
                  ^
Main.java:5: error: package com.mongodb does not exist
import com.mongodb.DB;
                  ^
Main.java:6: error: package com.mongodb does not exist
import com.mongodb.DBCollection;
                  ^
Main.java:7: error: package com.mongodb does not exist
import com.mongodb.DBCursor;
                  ^
Main.java:8: error: package com.mongodb does not exist
import com.mongodb.DBObject;
                  ^
Main.java:9: error: package com.mongodb does not exist
import com.mongodb.MongoClient;
                  ^
Main.java:10: error: package com.mongodb does not exist
import com.mongodb.WriteResult;
                  ^
Main.java:58: error: cannot find symbol
	private static DBObject createDBObject(User user) {
	                                       ^
  symbol:   class User
  location: class MongoDBExample
Main.java:58: error: cannot find symbol
	private static DBObject createDBObject(User user) {
	               ^
  symbol:   class DBObject
  location: class MongoDBExample
Main.java:68: error: cannot find symbol
	private static User createUser() {
	               ^
  symbol:   class User
  location: class MongoDBExample
Main.java:16: error: cannot find symbol
		User user = createUser();
		^
  symbol:   class User
  location: class MongoDBExample
Main.java:17: error: cannot find symbol
		DBObject doc = createDBObject(user);
		^
  symbol:   class DBObject
  location: class MongoDBExample
Main.java:19: error: cannot find symbol
		MongoClient mongo = new MongoClient("localhost", 27017);
		^
  symbol:   class MongoClient
  location: class MongoDBExample
Main.java:19: error: cannot find symbol
		MongoClient mongo = new MongoClient("localhost", 27017);
		                        ^
  symbol:   class MongoClient
  location: class MongoDBExample
Main.java:20: error: cannot find symbol
		DB db = mongo.getDB("journaldev");
		^
  symbol:   class DB
  location: class MongoDBExample
Main.java:22: error: cannot find symbol
		DBCollection col = db.getCollection("users");
		^
  symbol:   class DBCollection
  location: class MongoDBExample
Main.java:25: error: cannot find symbol
		WriteResult result = col.insert(doc);
		^
  symbol:   class WriteResult
  location: class MongoDBExample
Main.java:32: error: cannot find symbol
		DBObject query = BasicDBObjectBuilder.start().add("_id", user.getId()).get();
		^
  symbol:   class DBObject
  location: class MongoDBExample
Main.java:32: error: cannot find symbol
		DBObject query = BasicDBObjectBuilder.start().add("_id", user.getId()).get();
		                 ^
  symbol:   variable BasicDBObjectBuilder
  location: class MongoDBExample
Main.java:33: error: cannot find symbol
		DBCursor cursor = col.find(query);
		^
  symbol:   class DBCursor
  location: class MongoDBExample
Main.java:59: error: cannot find symbol
		BasicDBObjectBuilder docBuilder = BasicDBObjectBuilder.start();
		^
  symbol:   class BasicDBObjectBuilder
  location: class MongoDBExample
Main.java:59: error: cannot find symbol
		BasicDBObjectBuilder docBuilder = BasicDBObjectBuilder.start();
		                                  ^
  symbol:   variable BasicDBObjectBuilder
  location: class MongoDBExample
Main.java:69: error: cannot find symbol
		User u = new User();
		^
  symbol:   class User
  location: class MongoDBExample
Main.java:69: error: cannot find symbol
		User u = new User();
		             ^
  symbol:   class User
  location: class MongoDBExample
25 errors

Standard output is empty