MongoDB using Java part 2 - delete

package mongodb;

import java.util.ArrayList;
import java.util.List;
import java.net.UnknownHostException;

import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.MongoCredential;
import com.mongodb.MongoClient;
import com.mongodb.ServerAddress;

public class MongodbDelete {

 public static void main(String[] args) {
  // TODO Auto-generated method stub
  try
  {
   // 認證
   MongoCredential journaldevAuth = MongoCredential.createMongoCRCredential("your username", "your database", "your password".toCharArray());
   List auths = new ArrayList();
   auths.add(journaldevAuth);

   //連線
   ServerAddress serverAddress = new ServerAddress("your address", your port);
   MongoClient mongo = new MongoClient(serverAddress,auths);

   //選擇連線database
   DB db = mongo.getDB("your database");

   //選擇collection (table)
   DBCollection site = db.getCollection("site");

   BasicDBObject searchQuery = new BasicDBObject();
   searchQuery.put("city", "Taipei");
   site.remove(searchQuery);
  }
  catch(UnknownHostException ex)
  {

  }
 }

}