Vertical Resize Code

Vertical Resize Code I have some code I’m trying to write for a CS class. On resizing BMP files. I’ve already done horizontal resizing, but I just can’t figure out the … Read more

flutter – Kindly help me I am facing this issue during state management and using provider (firebase): “Error: Unexpected null value.at Object.thr

I am doing state management and using providers here are my file of code: I was trying to acess my user details stored through providers in firebase but I get the null value error. I also call the init state but still i am getting this error. Like I can access the user details by … Read more

spring boot – i called the method of function of another package while calling i get a service is null in called class because two controller has service

spring boot – i called the method of function of another package while calling i get a service is null in called class because two controller has service – Stack Overflow … Read more

spring – Using JUnit Mocked ObjectMapper shows Null. java.lang.NullPointerException: objectMapper is null

First of all, I am new to UnitTest. When I mocked my objectMapper inside of the test. It returns me null. My last tests were the same structure. I believe I am using the corrupted junit. Intellij may be confused. Code ; public class ApiAuthenticationEntryPoint implements AuthenticationEntryPoint { ObjectMapper objectMapper; public ApiAuthenticationEntryPoint(ObjectMapper objectMapper) { this.objectMapper … Read more

flutter – FirebaseMessaging.instance.getInitialMessage return null message when I click on notification

I use Firebase messaging in my Flutter app , when I click on the notification background , I want to go to another specific screen so FirebaseMessaging.instance.getInitialMessage() triggered but message returns null . And for foreground notification I use onMessageOpenedApp when I click on the notification , onMessageOpenedApp doesn’t trigger . Here is the object … Read more

flutter – Null check operator used on null value on nullable list

I got below error in my flutter widget. addresses is nullable list and only got the index in that widget. May I know how can I solve this issue. Null Check Operator used on null value for this line Address address = systemData.addresses![index]; address_title.dart import ‘package:auto_size_text/auto_size_text.dart’; import ‘package:flutter/material.dart’; import ‘package:thitsarparami/helper/constants.dart’; import ‘package:thitsarparami/models/models.dart’; class AddressTile extends … Read more

JavaFX program with MySQL isn’t working because “this.Music” is null

Need help! I don’t quite understand what’s wrong with my code – can someone point it out to me, please? I am working on JavaFX, creating a program with two windows. In the second window, there is a table with columns. I created my database in MySQL, added some data to it, and it works … Read more

How to get values ​​of all the checkboxes checked using android kotlin? I am getting null pointer Exception

for logic of the question you can refer to this question:- question Logic After lots of efforts I have came to this point. Please help me solve this problem. Here is activity code:- class CheckboxesActivity : AppCompatActivity() { lateinit var recyclerView: RecyclerView lateinit var adapter: CheckboxAdapter override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_trail) recyclerView =findViewById(R.id.trail_rv) … Read more

sql – Nan values ​​in csv covert to null values ​​in MySQL

Hi I am currently converting a table with some NULL values ​​from MS SQL database to csv which means all these NULL values ​​will become NaN. Then I plan to convert the csv to MySQL database, however, they give me an error saying unknown column ‘nan’ in field list. Does anyone know how to solve … Read more