I have been using spring boot with stomp server for websocket with sockjs as frontend library. Intermittently I get the following message in the logs. As far as I have read this occurs when wrong content type is recieved in controller. But this data comes in through websocket and all the data is made to strin…
Tag: java
Why LocalDateTime formatted with zone offset?
Consider code: The output is 2022-05-04-17 while UTC time is 2022-05-04-10. The documentation says that LocalDateTime is without zone offset – so why there is 7 hour shift? (My local time zone is +7UTC) Answer You’ve called LocalDateTime.now(), which is documented as (emphasis mine): Obtains the c…
define a zone around a point of given coordinates and tell if the user is in the zone
I have a DB with 8000 locations and their coordinates in WGS84, I need to give those locations a certain “action range” of 5/10Km ,if the user is in the given range the method should return true I managed to get an approximate user location from the front end using navigator.geolaction and it retu…
Do…while is not working in input verification
So I’m trying to do an input verification for my program in java, and I’m trying to do that in this setter: But when I call it and put a wrong name, the do…while does not work and the program just continue Here’s where I call it What am I doing wrong? Answer Maybe that’s because …
Java instantiated and initialized list (Explanation needed)
Could someone help me understand why the answer to this is (B)? Assume that animals has been instantiated and initialized with the following contents. [“bear”, “zebra”, “bass”, “cat”, “koala”, “baboon”] What will the contents of animals b…
Counting Letters & Words in a Math Equation String
So, I have written a method named varCount(), shown below, that would count the number of letter variables in a math equation. This method is made inside a class, so the getter method of the private equation string attribute was used here. One example of what should result from this was, if you are using the …
How to stop my code from returning UnknownHostException when getting search results of a website?
I have written a Java program that uses the Jsoup library to search for something on “freewebnovel.com” and then print out the search results. It was working around a week ago pretty consistently but now it gives out Java.net.UnknownHostException every time I run it. I checked the website to see i…
Accessing to TextView from class implementing Runnable – Android Studio
I have a class ExampleRunnable which is calling the method under certain restrictions to change value percentage and TextView’s which will display this after setting visibility one line aboce. I am trying to display this value till i wont stop this thread. My application is freezing because i cant acces…
Getting java.io.IOException: Server returned HTTP response code: 400 for URL: when using a url which return 400 status code
I am trying to perform a get request using Groovy using the below code: String url = “url of endpoint” def responseXml = new XmlSlurper().parse(url) If the endpoint returns status as 200 then everything works good but there is one case where we have to validate the error response like below and st…
It is possible to Stream data from beam (Scio) to an S3 bucket?
Currently, I’m working on a project which extracts data from a BigQuery table using Scio in Scala. I’m able to extract and ingest the data into ElasticSearch, but I’m trying to do the same but using an S3 bucket as storage. Certainly, I’m able to write the data into a txt file using th…