The Java collection framework provides several collection implementations to store and operate on objects. Some groups of implementations are similar in the operations they perform, and it is common for novice programmers to use them interchangeably. ArrayList and LinkedList are two such implementations that are often confused and incorrectly applied in applications. I have written […]Continue reading

Sorting collections is a common task that Java developers deal with on a daily bases.  The Java Collections class provides us with two sort() methods to sort all collections that implement the List interface. Sorting Primitive Types & Strings In the example below, we will create a list with ten random integers and sort the list using the sort() method, […]Continue reading

Iteration is the most common operations done on a collection. For example, you may want to go through all the student grades to find who has the highest test scores. In Java we have four methods for iterating over a collection, the methods are the for loop, iterator, forEach and lambda expressions. Setup Collection Here […]Continue reading

Problem You are given a string and are asked to write a method to return true if the string is a palindrome and to return false otherwise. A palindrome is a string that reads the same from front to back like alula They are many solutions to check if a string is a palindrome. I’m going […]Continue reading