Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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I need help with this java problem so it can output like this in the image attached:

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.DecimalFormat;
import java.util.Scanner;

public class LabProgram {
public static void main(String[] args) throws IOException {
Scanner scnr = new Scanner(System.in);
// Initialize variables for calculating exam averages
int count = 0;
double sumMid1 = 0, sumMid2 = 0, sumFinal = 0;

// Initialize FileOutputStream for output
FileOutputStream fos = new FileOutputStream("report.txt");

// Prompt for the filename
System.out.print("Enter the name of the TSV file: ");
String fileName = scnr.nextLine();

FileInputStream fis = null;
try {
fis = new FileInputStream(fileName);

// Read the file and build the content string
StringBuilder sb = new StringBuilder();
int ch;
while ((ch = fis.read()) != -1) {
sb.append((char) ch);
}

// Split the content by lines
String[] lines = sb.toString().split("\n");

// Process each line
for (String line : lines) {
// Make sure the line contains sufficient data
if (line.isEmpty()) {
continue;
}

String[] tokens = line.trim().split("\t");

// Check the number of tokens
if (tokens.length < 5) {
System.out.println("Skipping invalid line: " + line);
continue;
}

try {
// Read student information
String lastName = tokens[0];
String firstName = tokens[1];
int mid1 = Integer.parseInt(tokens[2].trim());
int mid2 = Integer.parseInt(tokens[3].trim());
int finalExam = Integer.parseInt(tokens[4].trim());

// Calculate the average and grade
double average = (mid1 + mid2 + finalExam) / 3.0;
String grade;
if (average >= 90) grade = "A";
else if (average >= 80) grade = "B";
else if (average >= 70) grade = "C";
else if (average >= 60) grade = "D";
else grade = "F";

// Create report string
String reportString = lastName + "\t" + firstName + "\t" + mid1 + "\t" + mid2 + "\t" + finalExam + "\t" + grade + "\n";

// Write to report.txt using FileOutputStream
fos.write(reportString.getBytes());

// Update exam sum and count for average calculation
sumMid1 += mid1;
sumMid2 += mid2;
sumFinal += finalExam;
count++;
} catch (NumberFormatException e) {
System.out.println("Skipping invalid line with incorrect number format: " + line);
}
}

// Calculate and write the averages to the file
DecimalFormat df = new DecimalFormat("##.00");
String averageString = "Averages: Midterm1 " + df.format(sumMid1 / count) + ", Midterm2 " + df.format(sumMid2 / count) + ", Final " + df.format(sumFinal / count);
fos.write(averageString.getBytes());

} finally {
// Close the FileInputStream and FileOutputStream
if (fis != null) {
fis.close();
}
if (fos != null) {
fos.close();
}
}
}
}

Transcribed Image Text:Input Your file content xpected file content StudentInfo.tsv Barrett Edan Bradshaw Charlton 70 45 Reagan 96 Caius 73 61 86 Barrett Edan Bradshaw Charlton 70 45 Reagan 96 Caius 73 61 86 59 97 94 36 45 Mayo 88 Tyrese Stern Brenda 90 Averages: Midterml 83.40, Midterm2 76.60, Final 61.60 Mayo Tyres 88 Stern Brenda 90 F 88 80 D с 59 97 94 36 45 A B F 88 80 D с A B Averages: Midterm1 83.40, Midterm2 76.60, Final 61.60
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