For my password strength checker, I am unable to display the score that I get from the password that I enter. Here is the code below, the problem is displayed all the way at the bottom of my code: /** * Determine if the given string contains an upper case letter * @param s the string to check * @return
which tomcat version is suitable for java 8
Recently, our online web service using tomcat 7.0.23.0 and JVM 1.7.0_51-b13 need to upgrade to java 8, which tomcat version is suitable for java 8 ? Answer See this link http://tomcat.apache.org/whichversion.html for details about which tomcat versions are supported on which java versions. According to that l…
How to retry with hystrix
I have a hystrix command that encapsulates a REST call. In case of failure(e.g. timeout), I want to make a single retry and return an appropriate error if it still fails. As I can see, Hystrix doesn’t support retries. The only way to do it with Hystrix is to put the main logic into getFallback() method.…
Query id return type
I use spring data. I want to get some contracts from DB. So I create two queries. In first I get contracts id that I need, in second I get contract by this id. First query in Repository.class ServiceJPA.class But in last line above I have an error. java.lang.IllegalArgumentException: Parameter value element […
How to interpret and translate a Lottie animation from Kotlin to Java?
I have been trying to translate this Kotlin code to Java since the project is in Java. I am translating by looking into Kotlin syntax. However, there are still others that I am having a hard time understanding. https://github.com/airbnb/lottie-android/blob/master/LottieSample/src/main/kotlin/com/airbnb/lottie…
How to remove child objects from a @ManyToMany relation with lots of children in JPA and Hibernate
Let’s say I have two entities: Organization and User. Every user can be a member of many organizations and every organization can have many users. Now, I want to remove an organization (let’s say it has 1000 members). When the user has few organizations, this code is ok: But when organization coun…
Maven build and maven-failsafe-plugin – The forked VM terminated without properly saying goodbye
I use Docker and https://github.com/fabric8io/docker-maven-plugin for my integration tests. On my Windows 10 (after updating to Windows 10 1709) machine I faced the following error with my Maven 3.5.0 build: Right now I have no idea what can be wrong, I don’t see any failures with my tests. What can be …
Reading from File – Error “Exception in thread “main” java.util.NoSuchElementException: No line found”
I am writing a program that reads from a file titled “grades.txt” and displays the student’s name, three grades, and the average of those three grades. The text file looks like this: Here is the code. I am able to read from the file and output everything correctly. However, I keep getting th…
Spring rest controller @ExceptionHandler return xml content and json errors
So I have a @RestController and I want to return and validate XML based on a schema for a front-end application in order to display them in an editor. I want the errors to be in json format in order to handle and display them with js. The ServerError I want to return in JSON format : So the <xml>hello&l…
What is the equivalent of hashing Java code into C#?
I have a strange problem in getting equivalent hash code from C# code translated into Java. I don’t know, what MessageDigest update method do. It should only update the contents of digest and should compute hash after calling digest. Same thing I am doing in C# with SHAManaged512.ComputeHash(content). B…