Skip to content

Tag: java

Compability JDBC driver versions and PostgreSQL versions

Can anyone point me on where to find an exact documenation which postgreSQL database version requires which JDBC driver version? In the case at hand I want to know: What is the minimum required JDBC version in a Java server application connecting to a database of version PostgreSQL 11.13? Unfortunately the Po…

Subtraction loops in java

I am new to java and am stuck on this challenge. I am to calculate the state of water depending on the inputed temp and altitude. However, for every 300 metres (for altitude) the boiling point is to drop by 1 degree. I am confused as to how to make it a loop that will take one off for every

JList not behaving as I expected

I’m practicing with a JList which gets populated with random numbers as the “Add Numbers” button is being clicked, and I have run into a few issues I have not been able to fix. In the code below, I’ve placed a button to toggle the visibility state of the list but it turns out it does n…

Parse string with offset to Instant Java 11

I am trying to parse the following string 2021-10-15T08:39:05+02:00 into an Instant this works seamlessly using Java 15 but throws an error for Java 11. java.time.format.DateTimeParseException: Text ‘2021-10-19T11:06:35+02:00’ could not be parsed at index 19 Why is that the case? Edit: Java 15 Ans…

Checking Run time in IntelliJ IDEA Ultimate

Can I use InteliJ Ultimate’s profiler to see how long it takes for a method to be executed? Answer Two particularly helpful tools for examining the program at runtime are the debugger and profilers. The debugger is very precise and gives you full and granular control over the execution of the program, w…

How to map Iterable to its DTO?

I have the following repository: PermissionRepository: In my service, I am trying to map Permission entity to PermissionDTO, but as findAll() method returns Iterable<T> (Iterable<T> findAll();), I cannot convert as shown below as I generally use for List<T>. It throws “Cannot resolve m…

Uploading and displaing an image using JavaFX

I’m working with JavaFX, where I have written a code that contains display Image, through I want to display the image on my scene, but it’s not working. The image doesn’t display. When I’m using the getAbsolutePath() it also displays an error. Although 70% of my coding is done, I&#8217…