Since Java 9 we can use effectively final variables in try-with-resources. The example below presents a situation where one of the resources initialization throws an exception. When I run this example, the only output I get is a RuntimeException, meaning that Resource1 was not closed. That was expected, since it wasn’t initialized in the try-with-resources. But, is this the expected
Tag: java
Android Constraint Layout in Scroll View not showing the last item
I’m trying to make a fragment that have a sort of form with lots of textViews, EditTexts and spinners, so i have to use a scrollView to see all the items. For some reason the last item is not showing and i don’t understand why, I read lots of questions about this problem but no one works for me. Can
Fixed length Validation using Javax api
request response can be validated using javax annotation. However, need some help to have fixed length validation, as @Size(min=3, max=3). It is having message that ‘size must be between 3 and 3’. This is required to be changed. Answer If you want to change the default @Size message just declare parameter message into:
Reading in a .txt file in Java
I am trying to write a program which reads in a a list of nodes that interact with each other within a network. This is written in a text file in the format: This indicates node1 interacts with node2 and node3, node 2 interacts with only node3 etc. The program will be able to read in this file and will
Semaphore does not invoke release()
I have implemented a thread in an Android app that is invoked every minute, the invocation of the process occur through an Alarm Manager. @Override public void onReceive(Context context, Intent intent)…
How to make a grading program using ConsoleIO in Java (***No Scanner***) [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 2 years ago. Improve this question Write a Java application that takes in a number of grade scores (decimals allowed), and computes the average of them. Then print out a letter
Writing multiple lines using PrintWriter in Java
I am sorry if this question is already answered on the internet but by looking at the ‘similar questions’ I couldn’t find an answer for my problem. So basically I’m trying to understand why using PrintWriter to write lines of text into a file apparently skips the first line every 2 lines I give. This is the method I use
org.json.JSONException: Value {“storeid0”:[“1535″],”storeid1”:[“1862”]} at idddsss of type org.json.JSONObject cannot be converted to JSONArray
I am getting this response from my api {“idddsss”:{“storeid0”:[“1535″],”storeid1”:[“1862”]}} this is the code that I am using to get response from server and save all storeids in an array: But whenever i run the code i got following error, I don’t know why, I have parsed my code to JSONObject first and then to JSONArray and in loop I am
Room database not created
I’m trying to develop an app with Room. The project is in java. This is my first time using Room. I’ve followed the documentation and created class with @Database, @Dao & @Entity. However when I run the app, it throws the following exception. Can someone please help me figure out what am I doing wrong here? I’ve spent a day
Sentry android ANR, could there be a false alarm?
I’m using Sentry-Android 2.3.0 SDK to collect android crashes and ANR, for the past few months, there were a couple of weird ANRs showing up. All of them happened when the user turned on the device after some time, all of them happened in the MessageQueue.next method. After digging in the Sentry SDK source code a bit, I found the