I am getting the error in Java: Exception in thread “main” java.lang.Error: Unresolved compilation problem The local variable b1 may not have been initialized at Test.main(Test.java:20) Here is my code: Answer The problem here is that getBytes(String encoding) throws UnsupportedEncodingException. …
Tag: java
Jackson Serialize Field to Different Name
I have this JSON to deserialize: I want to serialize it to 2 different formats: [A] [B] I’m able to serialize it to 1 format: [A] only or [B] only. Here’s my code to serialize it to [B]: I read about JsonView here http://www.baeldung.com/jackson-json-view-annotation (section ‘5. Customize JS…
PDFtk throws a Java Exception when attempting to use ‘fill_form’ function
I have a PHP application that fills out a form from a database call. At present I am putting this together using PDFtk, I am able to run a number of PDFtk commands with no issue and I am currently working out the desired command at command line. My call is currently this: This exact call run multiple times ge…
Is it possible to validate a firebase token (JWT) from server (Java)
Browser Client – Uses Firebase to sign in and has the firebase userid, token in the local storage. When the browser calls the server – a REST API end point , the token is passed as a Request header. Now, the server is configured with a Firebase Secret. My question: is it possible to validate the f…
Android how to play different sound for each item in recyclerview
I build app with images of animals, and after you click on animal, its play sound for that animal. I use Recyclerview for displaying all animals items. My problem is that i do not know how to handle click event for playing sounds for each animal. I do know how to play same sound for each item in recyclerview …
Unable to Send Mail – javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
We are sending Mail using Spring JavaMailSenderImpl. Following is the configuration Properties File :- Console Logs We are convinced that this is not related to the SSL certificate as there are other web applications deployed in the same server which sends email perfectly with the same configuration. What cou…
Clarification on run-time/compile-time and heap/stack [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 6 years ago. Improve this question (Please excuse me if i got the title incorrect, I believe it is binding bu…
LinkedList remove at index java
I’ve made a remove method from scratch that removes a Node from a linked list at a specified index. It’s not removing the correct Node. I’ve tried to step through with the debugger in eclipse but couldn’t catch the problem. Each Node contains a token. I have included the Token class, N…
JavaFX’s Spinner raises NullPointerException on empty text input
I have an issue where an editable JavaFX 8 Spinner causes an uncaught NullPointerException if one clears the editor text and commits and then clicks either the increment or decrement button. This is j8u60 j8u77. With some luck the increment/decrement button will get stuck in depressed state and the NPE’…
How to detect EOF in Java?
I’ve tried some ways to detect EOF in my code, but it still not working. I’ve tried using BufferedReader, Scanner, and using char u001a to flag the EOF, but still not make any sense to my code. Here is my last code : The program supposed to stopped when it’s already reached the EOF, but I do…