My data schema in mongoDB { } I want to query on itemId such that if (In my database itemId is (1,2,12 , 13 , 15 27) ) if i search for itemId 1 then it fetch data start from 1 mean fetch data of itemId(1,12,13,15) if i am not pass itemId then fetch whole data. Please help me thanks
Recover data after closing a Jar file
I am working with a jar file that deals with a program where I open a window (using JFrame). In this window, I manipulate some data and store some of it in the private fields of a class. When I close my windows and reopen my jar file, all my data is lost. How can I save my data so
how can i show a total score to the player screen not using a Toast
I made a higher lower game . if the player guess the number he get a specific number of points depending on how many tryes he had I wrote the code, i have the total but i dont know how to display it …
A method should be in the class which realises a action or in the realised class?
Maybe the title is a little confusing, but I didn’t know how to say it properly (my English is not good at all, so sorry if it is harder to understand). Let’s say we got 2 classes, Person and Group, and a person can join a group. Both got a Collection of the joined groups or the persons that alrea…
How to print enum description
Im creating a Java application, I used enum to create movie category. When I input MovieCategory.WAR I would like to see War movie(My description) instead of WAR. How is it possible? I tried MovieCategory.WAR.getDescription() but does’t work. Answer The enum works correctly: Or, maybe you want the toStr…
Check the index creation progress in mongo DB using java driver
I have around 10 millions of data in MongoDB. There is a requirement to add a new compound index. I used the following code to create the index. Using ensureIndex with option creation in background. My question is how do I track the index creation progress. There are other sets of operations I need to do afte…
Why is casting in equals necessary?
I’m doing the Mooc course and it’s teaching us how to compare objects from made up classes like “Person” and see if they are equal to each other. They give us the following code: } For the equals method, I get that they compare using == first to check if it’s the same location. N…
How to make a String.format flag with a variable inside [closed]
Closed. This question needs debugging details. It is not currently accepting answers. Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question. Closed 2 years ago. Improve this question I nee…
Calling methods and how to use them
The task I am trying to do is to utilise the given classes and methods are to take the money from the richest account and give it to the poorest so they have the same balance and to print “(name) has $(amount).” I am clueless on which method to use and anything I try gives an error or and incorrec…
I am getting different startTimestamp and endtimestamp that i provided in networkstatsmanager.querydetailsforuid() method. How to solve it?
Getting different start time and end time that I am providing in NetworkStatsManager.queryDetailsForUid Here is my code snippet : I want to get application data usage in an interval of start time and end time I am calling method and passing start date and end date from calendar in milliseconds but after calli…