javax.validation defines a number of Bean Validation Constraints for values of most commonly used types. In this post we’ll show how to use each of them!
Continue reading Bean Validation ConstraintsJava
In this article we present practical Bean Validation Unit Testing using JUnit. Testing this part is very simple, yet often neglected by many developers. Let’s fix that!
Continue reading Bean Validation Unit TestingIn this post we show Java Bean Validation example! Bean Validation is fantastic and flexible library that can be used in JEE and JSE programs to verify data!
Continue reading Java Bean Validation examplejava.lang.InterruptedException is thrown when a Thread blocked in Object.wait(), Thread.join(), or Thread.sleep() is interrupted. Here we’ll look at these cases.
Continue reading java.lang.InterruptedExceptionjava.lang.IllegalMonitorStateException form Object’s notify/wait methods indicates basic synchronization issue. In this post we’ll show the reason and how to fix it!
Continue reading Java IllegalMonitorStateExceptionWe show how to remove duplicates from List in Java. Choose implementation depending on circumstances and with expected performance.
Continue reading Remove duplicates from List in JavaUntil Java 7 there was no simple and effective way to generate random numbers concurrently. Here we show ThreadLocalRandom to generate random numbers in a thread-safe way.
Continue reading Generate random numbers concurrently – ThreadLocalRandomJava 8 regular expressions have been improved with names for capturing groups. In this post we show how to used them to improve Java code maintainability!
Continue reading Java 8 regex match group – named capturing groupsIn Java 8 remove selected item from Collection? It can be done in at least two ways both of which we are going to implement here. Let’s code!
Continue reading Java 8 remove selected item from CollectionOne way to prevent concurrent modifications from different Threads is to given them their own local data. Java ThreadLocal allows to do thread data separation.
Continue reading Java ThreadLocal – thread data separation