How to run Mongo database db.currentOp(true) command using API

Using the Mongo Java API I can run the currentOp() command like this: MongoClient mongoClient = null; mongoClient = new MongoClient( "127.0.0.1", 27017); db = mongoClient.getDB("admin"); db.command("currentOp"); But I only get details of current operations. I need to get details of idle connections too. With reference with this **Behavior** If you pass in true to db.currentOp(), the method returns information on all operations, including operations on idle connections and system operations. db.currentOp(true) Passing in true is equivalent to passing in a query document of { '$all': true }. If you pass a query document to db.currentOp(), the output returns information only for the current operations that match the query. You can query on the Output Fields. See Examples. You can also specify { '$all': true } query document to return information on all in-progress operations, including operations on idle connections and system operations. If the query document includes '$all': true as well as other query conditions, only the '$all': true applies. While using this command db.command("currentOp(true)");, I get an exception like this: > "ok" : 0.0 , "errmsg" : "no such command: 'currentOp(true)', bad cmd: '{ currentOp(true): true }'" , "code" : 59}