FirebaseQuery.java

public class FirebaseQuery {

    //Build a key value Pair

    public Map<String, Object> getKeyValuePair(){
        Object obj = new Object();

        Map<String, Object> keyValuePair = new HashMap<>();
        keyValuePair.put("key1","This is a string value"); //a string value
        keyValuePair.put("key2",12); //an integer value
        keyValuePair.put("key3",12.45); //a double value
        keyValuePair.put("key4",1233455674); // a long value
        keyValuePair.put("key5",obj); //an object value

        /*
        * Firebase Database supports a range of data types which you can
        * see above and you can easily use maps to build a key value pair for string in firebase
        * database or updating child nodes
        * */

        return keyValuePair;

    }

}