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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Java Program ASAP

Here is a FileSorting program to read a CSV file, sorts a list of integers on each row, and prints a comma separated list of sorted integers on the console. Modify ir by removing  or changing the main method  os it passes all the test cases. 

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Scanner;

public class FileSorting {
    
    private static final String FILENAME = "somefile.txt";
    
    public static void main(String[] args) {
        // read integers from input file
        Scanner fileReader;
        ArrayList<Integer> numbers = new ArrayList<>();
        try
        {
            fileReader = new Scanner(new File(FILENAME));
            while(fileReader.hasNextLine())
            {
                numbers.add(Integer.parseInt(fileReader.nextLine().trim()));
            }
            fileReader.close();
        }catch(FileNotFoundException fnfe){
            System.out.println("File " + FILENAME + " is not found.");
        }
        // check whether the file is empty or not
        if(numbers.isEmpty())
        {
            System.out.println("File " + FILENAME + " is empty.");
            return;
        }
        
        System.out.println("ORIGINAL LIST: " + numbers);
        // sort the arraylist
        sort(numbers);
        
        // print the arraylist
        System.out.println("SORTED LIST:   " + numbers);
    }
    
    // this method takes an arraylist of integers as parameter and sorts the list in ascending order
    private static void sort(ArrayList<Integer> nums)
    {
        int i, j, temp;
        for(i = 0; i < (nums.size() - 1); i++)
        {
            for(j = 0; j < (nums.size() - i - 1); j++)
            {
                if(nums.get(j) > nums.get(j + 1))
                {
                    temp = nums.get(j);
                    nums.set(j, nums.get(j + 1));
                    nums.set(j + 1, temp);
                }
            }
        }
    }
}

input2x2.csv

-67,-11
-27,-70

input1.csv
10

input10x10.csv
56,-19,-21,-51,45,96,-46
-27,29,-58,85,8,71,34
50,51,40,50,100,-82,-87
-47,-24,-27,-32,-25,46,88
-47,95,-41,-75,85,-16,43
-78,0,94,-77,-69,78,-25
-80,-31,-95,82,-86,-32,-22
68,-52,-4,-68,10,-14,-89
26,33,-59,-51,-48,-34,-52
-47,-24,80,16,80,-66,-42

input0.csv

Test Case 1

 
 
 
 
 
 
Please enter the file name or type QUIT to exit:\n
input1.csvENTER
10\n
 

Test Case 2

 
 
 
 
 
 
Please enter the file name or type QUIT to exit:\n
input2x2.csvENTER
-67,-11\n
-70,-27\n
 

Test Case 3

 
 
 
 
 
 
Please enter the file name or type QUIT to exit:\n
input10x10.csvENTER
-51,-46,-21,-19,45,56,96\n
-58,-27,8,29,34,71,85\n
-87,-82,40,50,50,51,100\n
-47,-32,-27,-25,-24,46,88\n
-75,-47,-41,-16,43,85,95\n
-78,-77,-69,-25,0,78,94\n
-95,-86,-80,-32,-31,-22,82\n
-89,-68,-52,-14,-4,10,68\n
-59,-52,-51,-48,-34,26,33\n
-66,-47,-42,-24,16,80,80\n
 

Test Case 4

 
 
 
 
 
 
Please enter the file name or type QUIT to exit:\n
input0.csvENTER
File input0.csv is empty.\n
 

Test Case 5

 
 
 
 
 
 
Please enter the file name or type QUIT to exit:\n
input2.csvENTER
File input2.csv is not found.\n
Please re-enter the file name or type QUIT to exit:\n
input1.csvENTER
10\n
 

Test Case 6

 
 
 
 
 
 
Please enter the file name or type QUIT to exit:\n
quitENTER
 

Test Case 7

 
 
 
 
 
 
Please enter the file name or type QUIT to exit:\n
input2.csvENTER
File input2.csv is not found.\n
Please re-enter the file name or type QUIT to exit:\n
QUITENTER

 

 

 

 

 

 

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