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!
Bean Validation Unit Testing
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!
Java Bean Validation example
In 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!
java.lang.InterruptedException
java.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.
Java IllegalMonitorStateException
java.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!
Remove duplicates from List in Java
We show how to remove duplicates from List in Java. Choose implementation depending on circumstances and with expected performance.
Generate random numbers concurrently – ThreadLocalRandom
Until 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.
Java 8 regex match group – named capturing groups
Java 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!
Java 8 remove selected item from Collection
In 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!
Java ThreadLocal – thread data separation
One way to prevent concurrent modifications from different Threads is to given them their own local data. Java ThreadLocal allows to do thread data separation.
