JAVA CODE can only be added inbetween lins of grey code. Like in the image 10-13 linesPerform the following tasks:Declare a FileInputStream named gradeFStream, and a Scanner named gradeFileFS.Read string dataFileName from input.Assign gradeFStream with a FileInputStream that opens the file dataFileName for reading.Assign gradeFileFS with a Scanner created using gradeFStream.Ex: If the input is grade3.txt and:Contents of file grade3.txtFthen the output is:F grade1.txtLine 1Dgrade2.txtLine 1Agrade3.txtLine 1F 1 import java.util.Scanner;2 import java.io.FileInputStream;3 import java.io.IOException;45 public class FileReader {6public static void main(String[] args) throws IOException {7Scanner scnr = new Scanner(System.in);8String dataFileName;char gradeGrade;/* Variable declarations go here *//* Your code goes here */gradeGrade = gradeFileFS.next().charAt(0);System.out.println(gradeGrade);91011121314151617FileReader.java grade1.txt grade2.txt grade3.txtPP456NgradeFileFS.close();

Algorithm: Read and Print File Contents:StartDeclare variables:gradeFStream (FileInputStream) to…

Answered: JAVA CODE can only be added inbetween…

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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JAVA CODE can only be added inbetween lins of grey code. Like in the image 10-13 lines

Perform the following tasks:

Declare a FileInputStream named gradeFStream, and a Scanner named gradeFileFS.
Read string dataFileName from input.
Assign gradeFStream with a FileInputStream that opens the file dataFileName for reading.
Assign gradeFileFS with a Scanner created using gradeFStream.

Ex: If the input is grade3.txt and:

Contents of file grade3.txt
F

then the output is:

grade1.txt

Line 1

grade2.txt

Line 1

grade3.txt

Line 1

1 import java.util.Scanner;
2 import java.io.FileInputStream;
3 import java.io.IOException;
4
5 public class FileReader {
6
public static void main(String[] args) throws IOException {
7
Scanner scnr = new Scanner(System.in);
8
String dataFileName;
char gradeGrade;
/* Variable declarations go here */
/* Your code goes here */
gradeGrade = gradeFileFS.next().charAt(0);
System.out.println(gradeGrade);
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10
11
12
13
14
15
16
17
FileReader.java grade1.txt grade2.txt grade3.txt
PP
456N
gradeFileFS.close();

Expert Solution

Step 1: Algorithm of the Source Code:

Algorithm: Read and Print File Contents:

Start
Declare variables:
- gradeFStream (FileInputStream) to represent the file stream.
- gradeFileFS (Scanner) to read from the file.
- dataFileName (String) to store the name of the file entered by the user.
- gradeGrade (char) to store the grade read from the file.
Prompt the user to enter the file name and store it in dataFileName.
Try the following: a. Open the file specified by dataFileName for reading using FileInputStream and assign it to gradeFStream. b. Create a Scanner named gradeFileFS using gradeFStream to read from the file. c. While there are more lines in the file:
- Read the next line from gradeFileFS and store it in line.
- Print line.
Handle any IOException that may occur during file operations: a. Print an error message indicating that an error occurred.
Finally: a. Close the gradeFStream and gradeFileFS (if they are not null) in a finally block to ensure proper resource cleanup.
End

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