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.
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Are RMap `getMap`, `putAll`, `put`, `remove` operations atomic & threadsafe?
We are using Redisson library for Redis and we are utilizing Hash data structure to store an object with different properties.
We have 2 Kafka listeners, which listen for incoming messages, and store ...
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How to catch the PSQLException exception? [closed]
How to catch the **PSQLException ** exception? I am using Spring boot JDBCTemplate and it can throw a PSQLException exception. Using try-catch, I get this message from IDEA: "Exception 'org....
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How to get Last element in the redis elasticache if the highest score is not known? Also, how to get limited number of elements in a particular range?
I am trying to get the element with highest score in redis elasticache.
some documentation states that, this can be done by using 2 methods-
jedis.zrangeByScoreWithScores(key, min, max);
jedis....
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1
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Best Practices for Validation in a Spring Boot Application [closed]
In my Spring Boot application, I have encountered a scenario where multiple services interact with each other, and objects passed between them need to be validated. Currently, I am using @Valid in the ...
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excelWB.write(fileOut); gives IllegalArgumentException
I am trying to use an excel to write the into new file using Apache POI. This is the method code,
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import ...
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Apache Camel OnException JUnit5 Test
I have this Camel Route and would like to test it.
from("jms:queue:importer.messageImport")
.routeId("Import")
.onException(Exception.class)
.maximumRedeliveries(0)
...
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Bean Could not be found despite proper project file structure
File Structure screenshot
I've seen other posts solving this issue with this exact file structure yet no matter what I do it always gives me this error:
***************************
APPLICATION FAILED ...
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Issues with Region in S3AsyncClient using Minio with AWS SDK for Java
I encountered an issue while configuring S3AsyncClient using the AWS SDK for Java in a Spring Boot application. Despite setting all the necessary properties, I keep receiving the following error ...
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Java libraries built from source have differences to those published wrt to anonymous classes
I am trying to build groovy (and others) from source using the instructions in their help file.
https://github.com/apache/groovy/tree/GROOVY_3_0_21?tab=readme-ov-file
The built binaries operate just ...
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Is JBoss 8 compatible with java 8? [duplicate]
I am trying to migrate an ear application from JBoss 7.1 eap to jboss 8, is it compatible with java 8?
I get the following error
Error: A JNI error has occurred, please check your installation and try ...
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javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: could not extract ResultSet
Here the error:
javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: could not extract ResultSet
at org.hibernate.internal.ExceptionConverterImpl.convert(...
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I have implemented the code to raise local reminder notification everyday at specific time. On Android 14 phone not able to receive this notification
Below is my code snippet.
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
android.icu.util.Calendar calendar = android.icu.util.Calendar.getInstance(...
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Java Stream API memory consumption of multiple .filter() in chain [duplicate]
Have a question regarding .filter (or any other non-terminal) methods in Stream API chain (code in the block below is just for example):
var s1 = Stream.of(1,2,3,4,5,6,7,8,9);
var intemidiate1 = s1....
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1
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Mocking a vendor class that is not initialized by my code in Mockito [closed]
I have a very unique challenge with respect to unit testing a scenario.
There is a vendor application provided by a jar file. I have to write code on top of it. Internal to vendor application the ...
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how to specify the author of commit created by revert() in JGit?
Suppose there is a file that is added and committed to a Git repository with the change reverted:
try (Git gitParent = Git.init().setDirectory(parentRepositoryRoot).call()) {
final String fooName =...
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