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...

I want to create a static scanner but i will like to put the try catch block around it so it can automatically close avoiding resources leaks and or this exception: Exception in thread "main" java.util.NoSuchElementException: No line found at java.util.Scanner.nextLine(Scanner.java:1585) at softwareEngineer.UserApp1.main(UserApp1.java:82)

To access methods in the Scanner class create a new scanner object as "in". Now we use one of its method, that is "next". The "next" method gets the string of text that a user enters on the keyboard. Here I'm using in.nextLine(); to get the String which the user enters.

import java.util.Scanner; import java.util.ArrayList; public class Main { public static void main (String ...

Apr 12, 2014 · you have to create scanner class object inside main method. ... import java.util.Scanner; public class ...

Dec 19, 2012 · There are three ways to approach this problem: Call next() on the Scanner, and extract the first character of the String (e.g. charAt(0)) If you want to read the rest of the line as characters, iterate over the remaining characters in the String.

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 will create a scanner object -> then after reading the line will close the stream , this will happen 1 million times also , which is an obvious not needed overhead ..

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, Scanner dataIn) ... Here is how you can make the Scanner static: replace. Scanner dataIn = new Scanner(System.in); in the main() with. static Scanner dataIn = new Scanner ...

Oct 1, 2015 · I'm trying to write a program that will read in a file of students academic credit data and create a list of students on academic warning. I first need to set up a Scanner object to read from the input file. I am new to Java and I need step by step instructions.

Jan 13, 2014 · public class java_1 { static Scanner stdin = new Scanner(System.in); import java.util.Scanner; Thats the code used to declare it, if you can declare it another way could i get a link to the documentation.