JAVA - Страница 2872

Why does NetBeans IDE raise a flag on printing a Java stack trace?

try { //try to do something there } catch (IOException e) { //handle the exception e.printStackTrace(); } For some reason the printStackTrace is underlined in a squiggly line. When...

I am developing an app in which I want to send mail from app without user intervention (without using intents), and it is not good to take the user credentials (without using Java mail API), but how to bind the body of the mail from Android...

Hi everyone i have a problem with @JoinColumn. In my case i just want to reach Entities with @JoinColumn(Foreign Key) not using @OneToMany or @ManyToOne beacue these 2 annotation pretends to have a entity in it.

Example :

Product Entity :...

I am using attempting to setup QuestDB with Hibernate and the Java Micronaut Framework. I am failing to map correctly to Java entities. Also, it looks like QuestDB is failing to generate a schema table on startup. I am using the postgres driver to...

I have a 2D array that I need to reset each time a tic tac toc game is started. I call a method and loop through the array setting all the elements to Zero. But this defeats the purpose of my program because i need to have all the elements...

TLDR: Why does my Spark cluster fail to complete writes to a Delta table unless my Jupyter Notebook has access to the data location, contrary to my expectation that Spark should handle writes independently of Jupyter's data access?

I've set up a...

I've made a custom toolbar with a title and functioning popup menu, but I can't seem to get a search menu to show up in the toolbar. The search menu icon doesn't even show in the toolbar for this activity and I can't figure out why.

Main...

I want to count the number of times the button plus is pressed. I do it with an object. I want to know if I can do it just with a simple int and how, as it says it needs to be final or effectively final (like in the lambda function)

Here's a...

I'm just starting to implement a FilterWriter (or a PrintWriter, may switch the base later) to provide specific formatting capabilities, and I need to do both: scan for new line occurrences, and write new lines explicitly. While reviewing the...

I am facing conceptual issue on how to store session in mobile app after sending login request to API. Basically what I have done so far I created web server using Node.js and I handle sessions using express-session. What I want to to is to create...

I have a project where every Student can be tested by a Tester, and a single tester can test many students.
I need students to know their testers - so this is a unidirectional Many to One.

Tester:

@Entity public class Tester { @Id...

Error NoClassDefFoundError:

Exception in thread main java.lang.NoClassDefFoundError: Mythread (wrong name: MyThread) at java.base/java.lang.ClassLoader.defineClass1(Native Method) at...

I have a 2D string array. It should be stored in such a way that it should be sorted in descending order of 2nd element in array and if there is a tie, lexicographically as per first element. My java code is as follows:

String arr[][] = new...

I had to change some of my infrastructure so I am now using MariaDB 10.11. My problem is that my setup no longer works. My Maven setup used the mysql-connector-java 5.1.34 package to connect to an older MariaDB version without any problems. Now I...

Hi all: today we are running Tomcat 9.0.5 and quartz 2.3. We would like to migrate to Tomcat 10 but quartz 2.3 breaks. Do you know if quartz 2.4 is ok with Tomcat 10? Thanks Pietro

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How can I solve this problem in Spring Boot in VS Code, when I click run this commands appear in terminal.

This is pom.xml file:
4.0.0 org.springframework.boot spring-boot-starter-parent 3.2.2 com.quiz test 1.0.0 test Demo project for...

Let's assume that we have a fullstack application that has a page in the frontend side where we can select the constraints that we should apply to a specific problem. The list of those constraints will be sent to the backend side when we run the...

I have developed a basic program where it has list(recycler view) and you can search from it. But, the issue i encountered is when i tried to integrate a search feature. When trying to find the id of the search view, my app crashes. I also tried to...

I've installed localstack using Helm:

The localstack chart was installed in its own localstack namespace, and I saw no errors in the localstack pod logs. In a different namespace I have a Spring Boot app (version 3.2.1), that needs to...

It doesn't let me saying it should be final or effectively final.

Here's a snippet:

int hrs = 0; JButton plus = new JButton(); plus.addActionListener(e -> hrs++); How do I increase hrs? (I want it to be a local variable in main)

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Can someone point me in the right direction on how to open the default web browser and set the page to www.example.com thanks

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TL;DR:

Should the system line.separator be used strictly for and only on output?

Does it make sense to augment the System.lineSeparator() documentation to mention something along the line: (?)

...

On UNIX systems, it returns \n ; on...

I am a newbie, and in my first year of web development job. I need some help.

Recently, I had one incident on production which, in summary, is caused by sending two exactly same POST requests from the browser (MS Edge). It has not happened before,...

The problem is that when you first click on the combobox, the text in it is displayed with a downward shift, but with further manipulations everything is fine. Moreover, if the cell has already been clicked previously, when clicked again, everything...

I added in my pom.xml the following plugin to run test classes in parallel

org.apache.maven.plugins maven-surefire-plugin classes 10 ${profile.name} 1 true And i have

@RunWith(Suite.class) @Suite.SuiteClasses({ test_1.class, test_2.class })...