Java wrapper class Integer provides an utility function toOctalString(int) which returns an integer in octal form. However, in this post, we will also see an example on how we can convert integer to octal form mathematically without using Java API classes. If you divide a number with 8, what you get in the reminder is … Read more How to Convert an Integer to Octal in Java
A number which doesn’t contain fractions is an integer, also called as whole number. In this post, we will see an example to reverse an integer mathematically. After dividing any integer with 10, we get reminder as its last digit and quotient as its first part of the number without last digit. Output: Dry Run: … Read more How to reverse an integer in Java
Quick Sort is based on the divide and conquer strategy. It is also called as 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 … Read more Quick Sort in Java
In Bubble Sort, we always compare one array element with its adjacent element. If the first element is greater than the next element, we swap both of them. These steps will be repeated several times to push all the big numbers to the end one after one. Program: Output:
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 How to read input from User in Java
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 How to add a List to another List in Java