I am currently working with Android Studio (with Java) and am having some trouble deleting a document. Say I am using a “Collection” with a “document” with a specific “field”. I need to delete the document if the field is “apple” but I don’t know the actua…
Tag: java
Java could not find XML resource bundle
error: If they are *.properties, no problems. How to load XML resource bundles? Answer By default, Java SE ResourceBundle.getBundle(…) only understands loading of resource bundles implemented as Java classes or “.properties” files. If you want to load a ResourceBundle from an XML file, you n…
multi-pom in intellijIDEA. Error adding module to project: null
I wanted to make a multi-pom project in Intellij (2020.3.4). In one Maven project, I right-click ->New -> Module -> Maven. select parent to “my project”. However, even if parent is not specified, I get the error: Error adding module to project: null. (at the same time, it adds a regular f…
Java failure in looking up the MX record for specific domain
Here’s a piece of code demonstrating a case where the Java standard extensions for working with DNS fail to correctly look up the MX record for a specific domain, while the dig utility has no problem doing so. I have replicated this across different machines, networks, and operating systems (AWS Ubuntu,…
Can I use Azure Event Grid topics to communicate domain events in a microservice architecture?
I am confused. When comparing the messages services offered by Microsoft Azure, we can choose between: Event Grid Event Hubs Service Bus (Azure Cache for Redis) This link gives the following comparison: Now I’d like to write a microservice application consisting of several components. Each component sho…
Does functions occupy more memory for each instance of the same object?
Imagine this extreme situation: A class City with 10 variables, but 1000 lines of functions and logic that operates these variables. I don’t know exactly how much memory will occupy a instance of this class, but let’s say that the variables occupy 10 bytes and the 1000 lines of functions occupy 1 …
Can’t Change button or panel location in Swing (Java)
I can’t change the location of Button or Panel in “setbounds” in java swing.It’s just stuck to the top. What should I change here? Should I add a “Gridlayout” to the button or something? Changing the panel location does nothing for the button. public class Main { Answer In …
Return all files within a folder using Google Drive Java API
I’m able to retrieve all the files inside of my root folder using this code: However I would like to return only the files inside the “test” folder under root, but this fails: with this error: Any idea what I’m doing wrong? Answer You missed the quotes around test. And test cannot be t…
How to extract the error hint of text box when user entered incorrect value in Selenium
When incorrect value is entered in textbox next hint is appeared: HTML: I need to get text from this hint. I have tried to used: but it did not help. How to get text from such hints? Answer This error hint is basically the HTML5 Constraint validation message which is the outcome of Constraint API’s elem…
How to handle a SIGSEGV with jffi / jnr?
The Java VM crash with a SIGSEGV in a docker container. On all other systems it is working as expected. and the stack trace What can I do to solve this problem with jffi / jnr? How can I receive more details about the problem? Answer The cause of the crash on Linux was a inkompatible native libraries for the