Java – Page 909 – Java Questions

Kafka Stream with Avro in JAVA , schema.registry.url” which has no default value

apache-kafka apache-kafka-streams avro confluent-schema-registry java

I have the following configuration for my Kafka Stream application And I got the following error: I have tried to replace the line with but with the same error I have followed the instruction from this url when preparing my Stream application. Any suggestion? Answer If you have keys and values in Avro format …

Is Spring Framework used in a unit test?

java junit spring spring-boot unit-testing

I am getting ready to take my Spring Certification v5.0 and there appears to be a question: Do you use Spring in a unit test? Link to Exam Guide questions. From Spring reference guide I know this: The POJOs that make up your application should be testable in JUnit or TestNG tests, with objects simply instanti…

Java JDB: ERROR: transport error 202: gethostbyname: unknown host

debugging java

I have a very similar error message to this post; however, the solution on that same post did not work for me. Editing the host file my adding in 127.0.0.1 my-host-name to my hosts file (per solution in linked thread) did nothing for me unfortunately. After “run” in JDB, I get the following error …

Parse date-time from String with offset with one-digit hours

date datetime-parsing java parsing timezone-offset

I need to parse date in Java. I have String value 2018-05-15 09:32:51.550082 +3:00 and I need to parse it into date-time. I tried to parse to ZonedDateTime, but I got an error at index 10. Tried to parse with DateTimeFormatter parser ‘yyyy-MM-dd HH:mm:ss.SSSSSS Z’ and got error at index 26. Appare…

Converting string to ‘Instant’

date java java.time.instant timezone zoneddatetime

I am trying to convert datetime in a string to an Instant instance using Java 8 or a utilities package. For example, to reqString is in the America/Toronto time zone. This is what I tried The above code results in “2018-05-12T23:30:00Z”. How can I do it? Answer tl;dr Fix your formatting pattern fo…

Incompatible library version selenium / guava

gradle guava java selenium

My app has a hard dependency on com.google.guava:guava:23.3 or superior But I am also using org.seleniumhq.selenium:selenium-java:3.0.1 which is incompatible with guava versions > 22.0 as discussed here: https://github.com/SeleniumHQ/selenium/issues/4381 I am pretty new to Java, what is the best course of …

How do I replace multiple characters in a String?

kotlin

How do I replace multiple characters in a String? Like Java’s replaceAll(regex:replacement:) function. This answer is very close but I want to change more than one character at the same time. Answer [$,.] is regex, which is the expected input for Java’s replaceAll() method. Kotlin, however, has a …

RecyclerView inside RecyclerView swipe to delete on child

android android-recyclerview java

I have a really basic concept and it’s probably a really easy solution that I am missing. I basically have a recyclerView inside a recyclerView. It works perfectly and everything is smooth. I recently decided to add a swipe to delete to the recyclerViews. The parent one (the outer most) works perfectly.…

Can Java’s Stream.collect() return null?

java java-stream

The JavaDoc for Stream.collect() says that it returns “the result of the reduction”. That doesn’t tell me if code like this can return null for filteredList: I would expect that if it could return null then it would return an Optional, but it doesn’t say that either. Is it documented a…