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 the following lines should do the

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 instantiated using the new operator,

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 message: Initializing jdb … run run

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. Apparently my UTC offset of +3:00 cannot be parsed.

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 for unpadded month and day. Use only java.time

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 action here ? I have looked into class loaders but that looks like a pretty deep rabbit hole. Answer As

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 class called Regex, and string.replace() is overloaded to take either a String

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. However, when I try to do the exact

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 anywhere whether Stream.collect() can return null? Answer Collector.toList() will return