Reading a .txt file using Scanner class in Java

Question

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 with getting the program to read the text file.

I am getting the following error messages:

java.io.FileNotFoundException: 10_Random (The system cannot find the file specified) at java.io.FileInputStream.open(Native Method) at java.io.FileInputStream.<init>(Unknown Source) at java.util.Scanner.<init>(Unknown Source) at insertionSort.main(insertionSort.java:14) 

I have a copy of the .txt file in my "src" "bin" and main project folder but it still cannot find the file. I am using Eclipse by the way.

import java.io.File; import java.io.FileNotFoundException; import java.util.Scanner;  public class insertionSort {  public static void main(String[] args) {      File file = new File("10_Random");      try {          Scanner sc = new Scanner(file);          while (sc.hasNextLine()) {             int i = sc.nextInt();             System.out.println(i);         }         sc.close();     }      catch (FileNotFoundException e) {         e.printStackTrace();     }  } } 

Answer 1

You have to put file extension here

File file = new File("10_Random.txt"); 

Answer 2

Use following codes to read the file

import java.io.File; import java.util.Scanner;  public class ReadFile {      public static void main(String[] args) {          try {             System.out.print("Enter the file name with extension : ");              Scanner input = new Scanner(System.in);              File file = new File(input.nextLine());              input = new Scanner(file);               while (input.hasNextLine()) {                 String line = input.nextLine();                 System.out.println(line);             }             input.close();          } catch (Exception ex) {             ex.printStackTrace();         }     }  } 

-> This application is printing the file content line by line