I am working on a Java program that reads a text file line-by-line, each with a number, takes each number throws it into an array, then tries and use insertion sort to sort the array. I need help w...

There are several ways to get input from the user. Here in this program we will take the Scanner class to achieve the task. This Scanner class comes under java.util, hence the first line of the …

May 7, 2025 · How to use scanner in java? [duplicate] Ask Question Asked 11 years ago. Modified 5 years, 4 months ago.

Dec 19, 2012 · I am trying to find a way to take a char input from the keyboard. I tried using: Scanner reader = new Scanner(System.in); char c = reader.nextChar(); This method doesn't …

Sep 1, 2015 · The Scanner class is a class in java.util which allows the user to read values of various types. There are two constructors that are particularly useful: one takes an …

Jun 24, 2016 · Take this scenario for explanation , If you need to read 1 million lines , so we need 1 million calls to the scan function thats the common thing , the difference now is your code …

Mar 24, 2010 · You can use java.util.Scanner : import java.util.Scanner; //... Scanner in = new Scanner(System.in); int num = in.nextInt(); It can also tokenize input with regular expression, …

Apr 12, 2013 · Passing the scanner to the DataTest method, or; Making the scanner static in the class. Here is how you can pass the scanner: public static int DataTest(int selectionBound, …

The problem is that by using scanner.nextInt() you only read an integer value, but not the whole line and you don't consume the newline character (\n) that is appended to the line when you …

Mar 23, 2020 · With Scanner the default delimiters are the whitespace characters. But Scanner can define where a token starts and ends based on a set of delimiter, wich could be specified …