Quick Sort is based on the divide-and-conquer strategy. It is also called a partition exchange sort. It was developed by Tony Hoare in 1959. Steps for Quick Sort: First step in Quick Sort is to choose an element called as pivot. Once the Pivot is selected, we need to reorder the elements so that: all … Read more
What is Bubble Sort? Bubble sorting algorithm sort items in a list by repeatedly comparing adjacent elements and swapping them when they are out of order and this process is repeated until it sort the entire list. Bubble Sort Animation A picture is worth a thousand words. I found this interesting bubble sort gif file … Read more
In this post, we will discuss on how to read input from User using Scanner and InputStreamReader. Scanner(System.in) To read values of known type from standard input, we can use Scanner class. When I say known types, any primitive like int, double, char or a String. Scanner provides various utility methods to read input such … Read more
Collection class in java.util provides addAll method which accepts a list and adds them to the source object. Since, List and ArrayList inherit from Collection, we can use this method to add a List to another List. boolean Collection.addAll(Collection) This method appends all the elements from the new collection to the end of the source … Read more
To rename a file, we can use File.renameTo() function from java.io package. However, renameTo() function requires a new File object with the new name that we want to name the source file, instead of just passing the new name to renameTo() function. So, to rename a file, we need to create two File objects, one … Read more