Mongo find query is not using indexes in java code but working on mongo cosole

I found a strange issue. When i run mongo query from my java code with explain true it does not show me index used in the query but when i run it using mongo console it works fine .

db.locationCount.find({ "articleId" : "3784416" , "host" : "abc.com" , "timeStamp" : 1423481400000 , "isIndia" : -1 , "location" : "Unresolved"}).explain();

On console it gives

{
    "cursor" : "BtreeCursor articleId_1_host_1_timeStamp_1_isIndia_1_location_1",
    "isMultiKey" : false,
    "n" : 1,
    "nscannedObjects" : 1,
    "nscanned" : 1,
    "nscannedObjectsAllPlans" : 5,
    "nscannedAllPlans" : 7,
    "scanAndOrder" : false,
    "indexOnly" : false,
    "nYields" : 0,
    "nChunkSkips" : 0,
    "millis" : 1,
    "indexBounds" : {
            "articleId" : [
                    [
                            "3784416",
                            "3784416"
                    ]
            ],
            "host" : [
                    [
                            "abc.com",
                            "abc.com"
                    ]
            ],
            "timeStamp" : [
                    [
                            1423481400000,
                            1423481400000
                    ]
            ],
            "isIndia" : [
                    [
                            -1,
                            -1
                    ]
            ],
            "location" : [
                    [
                            "Unresolved",
                            "Unresolved"
                    ]
            ]
    },
    "server" : "ibeatdb61:27017",
    "filterSet" : false,
    "millis" : 1
}

But on java console it shows this

{ "cursor" : "BasicCursor" , "isMultiKey" : false , "n" : 1002492 , "nscannedObjects" : 1002492 , "nscanned" : 1002492 , "nscannedObjectsAllPlans" : 1002492 , "nscannedAllPlans" : 1002492 , "scanAndOrder" : false , "indexOnly" : false , "nYields" : 7831 , "nChunkSkips" : 0 , "millis" : 499 , "allPlans" : [ { "cursor" : "BasicCursor" , "isMultiKey" : false , "n" : 1002492 , "nscannedObjects" : 1002492 , "nscanned" : 1002492 , "scanAndOrder" : false , "indexOnly" : false , "nChunkSkips" : 0}] , "server" : "ibeatdb61:27017" , "filterSet" : false , "stats" : { "type" : "COLLSCAN" , "works" : 1002494 , "yields" : 7831 , "unyields" : 7831 , "invalidates" : 0 , "advanced" : 1002492 , "needTime" : 1 , "needFetch" : 0 , "isEOF" : 1 , "docsTested" : 1002492 , "children" : [ ]}}

MOngo version is 2.6.4 and jar version is 2.12.0