Category "java"

Thread.currentThread() performance

I have Runnable queue that invokes one by one in specified thread. val queue = LinkedBlockingQueue<() -> Unit>() val queueThread = thread { while(tr

Hibernate produces broken query

I have an entity that is mapped to the database table by Hibernate: @Entity @NoArgsConstructor @Getter @Setter @FieldNameConstants public class Set extends Abs

BubbleDown function(min heap) not working

I have generated a minheap to this file but I think something I have missed but I can't identify what are the things I have missed. I have missed something on

Java MongoDB numberLong query - Unable to fetch records

I wanted to fetch records between 1 date to other date from mongodb collection, where dates are stored as long in currenttimemillis. So I specified the query in

Java Firebase API: Notification vs WebpushNotification

The core class of the firebase java API is the Message / MulticastMessage class. MulticastMessage contains a Notification object and a WebpushConfig object. S

How to create a mac universal binary with bundled JRE?

I am creating a JAVA desktop app for Mac computers, using jpackage to bundle the desired JRE into the app and finally shipping a .app to the customers. With the

has UCanAccess any mechanism to write in-memory data to .accdb file in a java desktop application?

i'm losing new data that i made when i close my Java app and data are not written to .accdb file i have connected my Java to .accdb (Ms Access 2010) file as bel

How to update listview in Fragment with custom adapter

I am giving product id with barcode scanner. I can add product to listView but when i try to increase or decrease amount of the product. It doesn't update UI. I

How to safely combine strings into file path and open filewriter?

Is there a more elegant way to do the following? try (FileWriter myWriter = new FileWriter(Paths.get(folder,fileName).toAbsolutePath().toString())){ I have fol

package org.springframework.beans.factory does not exist error

I try to implement a simple hello world program using Spring framework. I have tried the following example in Windows environment without using IDE. In Eclipse

Perform streaming aggregations on CDC events that contain deletes/updates

A friend reached out and told me that he'd built a data pipeline that captures changes from MySQL using the Debezium connector, and then performs streaming aggr

Why do I get worse results in Java than in Python when using the same Tensorflow models?

Introduction: For education purpose I developed a Java class that enables students to load Tensorflow models in the Tensorflow SavedModel format and use them fo

Swing library creating unwanted grid when trying to use for loops to run function on every pixel

A program I am writing, upon running, generates a mandelbrot set mostly correct, however it additionally generates a grid of blank space. I have not found a sol

Android - How to get canvas object from my view?

My app uses a tensorflow lite model to detect objects from an uploaded image . Therefore I need to draw the bounding boxes of the object on the image that the u

Comparison with the Method equal() [duplicate]

When i compare two instances in java of the same type class, with the same values of their Attributes, why i get false? I'm new with OOP and d

Sending post request to S3 with RestAssured

I want to reproduce a postman call with RestAssured. The call send some text parameters and a file parameter to upload file to S3 It look like this : In rest a

Java.lang.NoClassDefFoundError: junit/framework/TestCase

After upgrading from JUnit 4 to JUnit 5 getting this error when i am trying to run test as JUnit in eclipse. Getting warning: failed to load class 'org.eclipse.

Creating a configurable JUnit library to test same features across several microservices

A set of tests should be run on every microservice. Current solution is to have an abstract class and extend in every service, providing the necessary propertie

openjdk@8 java is loading libcrypto in an unsafe way in macOS Monterey

I'm getting this error when running some mvn test on my Java application in macOS Monterey WARNING: /usr/local/Cellar/openjdk@8/1.8.0+322/libexec/openjdk.jdk/Co

Custom message for Type Mismatch validation error while using Spring Boot and Hibernate Validator

Controller public String dummyAction(@Valid @ModelAttribute DummyInputData inputData) { return "success"; } Entity public class DummyInputData {