I am working on an Eclipse based project that recently switched from Java 1.8 to Java 11. Due to that we have now a conflict between classes from the JRE and classes that are introduced from Eclipse plugin dependencies. So the java.xml.* classes are now present twice. once from the module java.xml and once du…
I have declared primary using PartitionKey annotation but still getting Entity Order does not declare a primary key
I have the following POJO: Getting the exception at the following code: The definition of connectionManager is here: https://pastebin.com/b3GKJuV6 The exception is as: I am implementing by following the documentation here: https://docs.datastax.com/en/developer/java-driver/4.2/manual/mapper/ . What could be t…
setReadOnly not working on PostgreSQL Connection
I have a problem setting a read-only connection with a PostgreSQL database using JDBC. I’m creating an application which loads queries to execute from a file, and I want to execute only SELECT (read-only) queries. Setting permissions on users who will run the application is not an option, so setting per…
Aeron basic pub/sub pair connects on same host, fails across hosts
I am running the BasicPublisher/BasicSubscriber pair from https://github.com/real-logic/aeron binding them to the same multicast group+port. When they run on the same host they connect, but when they run on separate hosts (same switch+subnet+vlan) the publisher reports “Offer failed because publisher is…
I am trying to write a DAO interface using Datastax 4.2.2, but getting several compile errors
I have the following POJO: And now I am writing the OrderDao as following: And when I do ./gradlew build I get the following errors: I am implementing by following the documentation here: https://docs.datastax.com/en/developer/java-driver/4.2/manual/mapper/ . What could be the possible cause of this? Thanks. …
How can I set up a JFrame button to open another JFrame, and then receive information once the second jframe is closed?
This is part of a project for school, and I’m stuck and need someone to bounce ideas off of. I have a game where there is an option to sign up or sign in for a machine-local game so a record can be kept of the person’s scores. The game is run from a base GUI JFrame, and I want
Use String Resource in layout xml along with Java
I have one button view in my layout.xml like below
How to find if a word immediately followed by a non-letter character exists in a String
I believe the most efficient solution to this issue is to use Regex but I’m uncertain of the syntax. When looking through a sentence, how do you identify if a word followed by a non-letter character (anything other than a,b,c,d,e…) is present in a string. Example below: Answer Use the word boundar…
Showing xml for correct view
When a user logs in to my app, they can either click the view students button or daily grading button. The view students will display a student’s image and their name. The daily grading will display …
Java built-in Observable push notifications
UPDATE Added the full code to make it easier to understand. I am trying to understand how to implement push vs pull notifications using Java built-in Observer. the Observable class has 2 methods …