I want to split an input string based on the regex pattern using Pattern.split(String) api. The regex uses both positive and negative lookaheads. The regex is supposed to split on a delimiter (,) and needs to ignore the delimiter if it is enclosed in double inverted quotes(“x,y”). The regex is – (?<!(?<!Q\E)Q\E)Q,E(?=(?:[^Q”E]*(?<=Q,E)Q”E[[^Q,E|Q”E] | [Q”E]]+[^Q”E]*[^Q\E]*[Q”E]*)*[^Q”E]*$) The input string for which this
Java: create copy of ArrayList of HashMaps but include only certain keys
Consider the following data structures: ArrayList<HashMap> entries = new ArrayList(); ArrayList keyNamesToInclude = new ArrayList(); This …
Connect to IBM MQ using JmsListener
I have a Spring application and I want to connect to IBM MQ using JmsListener. This is my configuration: This is my consumer: I have deployed the application into TomEE plus container, and I have sent few messages to the queue: I have also added the below entries in the servlet-context.xml However, application did not consume these messages. How do
Java Android Studio Open Answer Quiz Execution error
I used this Youtube Tutorial: https://www.youtube.com/watch?v=AkUfACbi6BE to create an Open Answer quiz in Android Studio using Java. I followed the tutorial exactly, but when I ran the code on a device, even if I answer questions incorrectly, it says I won the game. I am not sure why it isn’t validating answers correctly. Any tips on how to fix this
Is there any way to write this small piece of code in java? [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 12 months ago. Improve this question I am unable to understand the below code so, Is there any way to write this piece of code in java (Easy Manner)? Someone told
How to detect new lines from a Json text in Java, Android
The text is received from a Json is like this: I don’t know how to detect that empty space in java/Android. I want to replace the new lines from the Json with <br/> because I’m trying to find a workaround to this problem: Android, format text from Json to HTML removes new lines and white spaces Answer It seems that
How do I save the state of CheckedTextView checkbox so it stays checked after exiting?
So I kinda screwed up while making the checkedtextviews, didn’t realise i needed to save the state, I don’t know how exactly to do it. Any advice would be greatly appreciated. Answer I’m not familiar saving data yet, I know that there is a lot of ways of doing that so i’ll give one example: Before that here is a
How to find the inverse of a matrix using Apache Commons Math library in Java?
I’m trying to find the inverse of a matrix using the Apache Commons Math Library. Below is my attempt at doing just that: When I run this, I get the following error: When I go to line 160 of FieldLUDecomposition.java per the above error message, I see that the library thinks this matrix is Singular i.e. it thinks it has
Getting “error: package androidx.core.content does not exist” when trying to build android project with FileProvider
I am relatively new to Android development, and I’m using Android Studio for development. I am trying to work with the camera for my app, and I’m trying to follow the instructions here https://developer.android.com/training/camera/photobasics. It says to use the FileProvider class, but when I try to import it, I get the error “error: package androidx.core.content does not exist” I’ve already
Mockito Spy : Wanted but not invoked, but it is
I have a basic unit test for a Service with a mocked repository as follow : When running the test, I get the following error : Second sentence saying the exact opposite of the first sentence… I tried using verify(repoSpy, atLeastOnce()).deleteById(anyLong()); just in case, but same error message. Answer spy doesn’t alter the argument in-place, it decorates it and returns