Are you facing “Local variable assignedHour defined in an enclosing scope must be final or effectively final” error while trying to use local variable assignedHour that is not declared as final in the lambda expression or inside an inner class ?… Read More!
There are many ways to generate unique Long Id in java. You can use LongGenerator by apache commons id to generate unique Long id. Unique Long id using LongGenerator LongGenerator is an Identifier Generator that generates an incrementing number as… Read More!
This sneppet teaches you how to use ArrayList removeAll() method to remove elements from a ArrayList that are specified in a specific collection. Note, you have to override Object’s equals method to make this work. Example: ArrayList removeAll() method and… Read More!
In this sneppet you will learn how to check if string is not empty and not null in Java. Note, a String with just whitespace is not considered as empty in Java. The following are the ways to test whether… Read More!
Big O notation is used to classify algorithms based on how the running time and space requirements grows as the input size grows. Big O notation is represented using upper case letter ‘O’ and the meaning of this notation is… Read More!
