Questions tagged [java]
Java is a high-level object-oriented programming language. Use this tag when you're having problems using or understanding the language itself. This tag is frequently used alongside other tags for libraries and/or frameworks used by Java developers.
1,919,587
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Hibernate: Generate non-id value from sequence
I have an entity with 2 fields which both use the same sequence, but when debugging I see that only the id field value is being generated:
@Table(name = "MY_TABLE")
public class MyEntity {
...
- 29
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3
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Why is the wallet address generated by ton4j library using 24 words different from the real address of the wallet created using ton blockchain apps?
public class App {
public static void main(String[] args) {
try {
Pair key = Mnemonic.toKeyPair(Arrays.asList("artwork", "people", "where", "dolphin"...
-1
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0
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8
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jar file is not generated in my spring project
My name is Alex. I am learning spring and I have already completed a project. Now I want to upload it to the internet and publish it in my portfolio. However, when I give the following command in cmd: ...
- 9
-1
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5
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Trying to get my war file to deploy to tomcat 9 server
I am building a full stack IT Ticketing System and it is still in its infancy (this is just a side project for fun). I can get everything to work locally by running the backend through IntelliJ but ...
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4
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Android Studio get messages from server when app is closed
I am facing an issue when getting data from a server when the app is closed. I have an app for simple chatting, which gets and posts messages over http protocol to a server. I am not able to find a ...
- 1
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5
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Spring RestClient seems to ignore configuration
I am trying to utilize spring RestClient to send simple post request with object seriaslized to JSON in request body. I need the objects to be serialised excluding null valued fields, so I thought ...
- 55
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8
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SDKMAN can not install java because headers.tmp file is missing
I need to use multiple versions of java in my ubuntu 22. Just install SDKMAN with the command
curl -s "https://get.sdkman.io" | bash
but can not install java. When prompting command sdk ...
- 1,891
-1
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10
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My application frontend does not open when I use intellij only when I use eclipse
I have a legacy application that was migrated to SpringBoot and when I run it through Eclipse without configuring anything different it runs and when I access my http://localhost:8080 it opens ...
- 3
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9
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Jersey ServletContainer still trying to use javax
I am trying to update an application to run on Tomcat 10.1.26 supporting Jakarta EE 10 with jakarta.* package naming.
When deploying in Tomcat I get this error over javax.* package naming.
org.apache....
- 21
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8
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How to securely send files from server and store them to client's PC without client's interaction, with scheduling
I know that some iteration of this question was asked already, but I think my case is a bit more specific. I have a product that customers use to retrieve files from my server, periodically by ...
- 25
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9
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SpringBootTest uses application.properties from src/main
I am trying to run spring-boot test:
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
@ActiveProfiles("test")
public class UserServiceIt{}
THIS test doesnt need/...
- 1,280
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5
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How to use Flink Kafka datasource as InputStream
I need to run something on Flink that does the following:
Take a bunch of audio data from Kafka and stream them to AWS transcription service.
Sounds easy, my problem is that the ...
- 91
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15
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Spring Boot loading classes from nested jars inside main executable JAR
I have a requirement to compile classes during Spring Boot application runtime. To do that I am using ToolProvider.getSystemJavaCompiler() and following approach:
try (StandardJavaFileManager ...
- 192
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26
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How can I enhance the development of JAVAFX applications using MVC? [closed]
I have been working with JAVA and JAVAFX for some time now. I have come to discern certain limitations in utilizing FXML when tasked with creating dynamic and complex applications.
My personal ...
- 571
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How can I determine if a Java/Kotiln/JVM (AWT / Compose multiplatform) application is running within a window manager on linux?
I am creating a desktop application using Compose multiplatform.
More specifically, using the JetBrainsRuntime
via the glue provided by jewel.
I am looking for a way to determine if my application is ...
- 133
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1
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12
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Not provider of jakarta.mail.util.StreamProvider was found (not Spring Boot!)
I'm trying to migrate a JavaX.mail class to use Jakarta mail, as it's required to move from Tomcat 9 to 10. I'm receiving a message java.lang.IllegalStateException: Not provider of jakarta.mail.util....
- 612
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15
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KafkaConsumer is not able to process 2 million records
I am facing issue while fetching 2 million records from kafka topic through a consumer.
My requirement is to fetch the record and store those records into a Map and return that Map to other methods so ...
- 1
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9
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MultiPart Request Spring
How can I make a breakpoint in my api to receive a request with json + file using Spring?
I've already tried using RequestParam, RequestBody and RequestPart, but none of it worked. It works to receive ...
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11
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Show pdf file uploaded by user in Primefaces | Spring Boot
I have a widget to upload a file, and I want to preview the file after upload. I am using p:media tag but it is not showing the uploaded pdf file.
However, I have another widget where there is an ...
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8
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GRPC python cannot modify trailing metadata of python rpc status when aborting request (StatusRuntimeException)
Tried some hours to transfer trailing metadata inside StatusRuntimeException from a python service. This is like the current code sample which apparently doesn't work since the trailing_metadata is ...
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11
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Spring Boot JSON Merge Patch map properties to custom type field
In our codebase, we have a class called OptionalOrUndefined
public class OptionalOrUndefined<T> {
@Getter private final boolean defined;
private final T value;
public static <T> ...
- 5,401
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1
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30
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Proper way to shut down a Spring Boot application after a specific unit of work is completed
I have a number of Spring Boot services that are always running that perform several different kinds of tasks. For example I have one service that is reading from an Azure Service Bus queue using ...
- 5
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7
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ObservationHandler<ServerRequestObservationContext> does not expose context values to DefaultServerRequestObservationConvention
I am trying to use and extend spring boot's Observation API solution for instrumenting metrics for spring mvc http.server.requests.
I'm trying to add a custom tag, with the key duration, and a value ...
- 258
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17
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OpenAPI Swagger Documentation Jargons
I have configured OpenAPI documentation in my spring boot application. Everything is coming that is expected but there are a lot of jargons coming up. Only the highlighted and ticked values are ...
- 1
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9
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Getting AccessDenied while accessing getAllSites() method in MS Graph using Java
Getting AccessDenied error while accessing getAllSites() method in MS Graph using Java. I have taken this block of code from Microsoft Learn. When I tried to execute this code, I'm receiving Access ...
-3
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0
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39
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Exception in thread "main" java.time.format.DateTimeParseException: Text '04-Sep-2023' could not be parsed at index 3 [duplicate]
below is the datetimeformatter
DateTimeFormatter dtf2 = new DateTimeFormatterBuilder().parseCaseInsensitive()
.append(DateTimeFormatter.ofPattern("dd-MMM-yyyy")).toFormatter()...
-1
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1
answer
40
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Stream anyMatch accept an method reference not implement Predicate [duplicate]
Stream.anyMatch is defined as:
boolean anyMatch(Predicate<? super T> predicate)
I created a new Class as follows:
class ClassA {
public boolean anyMethodName(Object o) {
return ...
- 1,172
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0
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15
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Trouble streaming non-local Google Photos video without downloading
I'm making an app where the user can select a video from the gallery and launch it later using their default viewer.
My initial attempt looked like this
Intent intent = new Intent();
intent.setType(&...
- 19
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7
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Java API only partially available with Frida aarch64
I tried to attach with Frida to Java process run on aarch64 Linux (not Android)
I got that error:
using frida-server-16.4.3-linux-arm64
[Remote::PID::1234 ]-> Java.enumerateLoadedClasses();
Error: ...
-3
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0
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51
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Why Can't Characters Be Converted to Operators at Runtime?(java) [closed]
While learning Java, I wondered if there was a way to take an operator as a character input and use it directly in calculations. I realized that without using if or switch statements, there is no way ...
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