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!
Use System.nanoTime(), it returns the current value of the running Java Virtual Machine’s ( Please check JVM internal details ) high-resolution time source in nanoseconds.
Binary search is also known as half-interval search or logarithmic search. It is a searching algorithm used to find the position of an element in the sorted array. The payoff for using a sorted array comes when we use a… Read More!
