How to query documents using “_id” field in Java mongodb driver?

Question

I am trying to find documents in MongoDB by searching on \"_id\" key. My document looks like this-

{
  \"_id\" : ObjectId(\"4f693d40e4b04cde19f17205\"),
  \"         


        

Answer 1

You can do this

 ObjectId id= new ObjectId("4f693d40e4b04cde19f17205");        
    BasicDBObject obj = new BasicDBObject();        
    obj.append("_id", id);        
    BasicDBObject query = new BasicDBObject();        
    query.putAll((BSONObject)query);