This program reads data    from a physical file,    create a reference to the file,    perform a computation,    display the result,    close the file

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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This program reads data
   from a physical file,
   create a reference to the file,
   perform a computation,

   display the result,

   close the file

 

 

package chario;

 

import java.util.Scanner;

import java.io.*;

//

public class Chario {

 

//

    public static void main(String[] args) throws IOException

    {

    File file1 = new File("fileOne.txt"); //Create a reference to the physical file


/*
Use Notepad to create a text file named fileOne.txt
which must be in the same directory that src is in

 

To find src, open your project in NetBeans and hover its name, which is in the top left just below the Projects menu; this will display the path to your project

 

My project path is, yours will be different
I:\\Ajava\161\WPPractice\IO\charstream\chario
My  fileOne.txt is located in chario

*/

 

   

    Scanner getit = new Scanner( file1 );      // connect a Scanner to the file

    int num, square;

 

    num = getit.nextInt();

    square = num * num ;  

 

    System.out.println("The square of " + num + " is " + square);

    getit.close(); //Close the stream

    }

   

}

 

 

 

 

/*

 

 

This is not part of your Java code but the file your code will read
Your path will be different from mine

Create fileOne.txt in 


I:\\Ajava\161\WPPractice\IO\charstream\chario

 

Type an integer

Save fileOne.txt
Execute your program from NetBeans

 

 

*/

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