Question

Create a java program that will sort text files in descending order (left column).

Use your program to sort the file unsortedFoodListA.txt to a file named sorted.FoodlistA.txt . Next sort the file named unsortedFoodListB.txt to a file named sortedFoodListB.txt. Read your data into a string arrays and sort based on the Food Category.

Write a program named mergeFoodList.java . Use your program to create a merger of the to sorted files created to a file named mergedFoodFiles.txt. Merge using the food category type as the sorting key.

unsortedFoodListA.txt
____________________________

Vegetable   ,     Amaranth Leaves
Vegetable   ,     Arrowroot
Vegetable   ,     Artichoke
Vegetable   ,     Arugula
Vegetable   ,     Asparagus
Vegetable   ,     Bamboo Shoots
Vegetable   ,     Beans Green
Meat   ,     Bear
Meat   ,     Beef
Meat   ,     Beef heart
Meat   ,     Beef liver
Meat   ,     Beef tongue
Vegetable   ,     Beets
Vegetable   ,     Belgian Endive
Vegetable   ,     Bitter Melon
Vegetable   ,     Bok Choy
Meat   ,     Bone soup from meats
Vegetable   ,     Broadbeans (Fava Beans)
Vegetable   ,     Broccoli
Vegetable   ,     Broccoli Rabe
Vegetable   ,     Brussel Sprouts
Meat   ,     Buffalo Bison
Vegetable   ,     Cabbage Green
Vegetable   ,     Cabbage Red
Meat   ,     Calf liver
Meat   ,     Caribou
Vegetable   ,     Carrot
Vegetable   ,     Cassava (Yuca Root)
Vegetable   ,     Cauliflower
Vegetable   ,     Celeriac (Celery Root)
Vegetable   ,     Celery
Vegetable   ,     Chayote
Poultry   ,     Chicken
Poultry   ,     Chicken Liver
Vegetable   ,     Chicory (Curly Endive)
Vegetable   ,     Collards
Vegetable   ,     Corn
Poultry   ,     Cornish Game Hen
Vegetable   ,     Crookneck
Vegetable   ,     Cucumber
Vegetable   ,     Daikon
Vegetable   ,     Dandelion Greens
Poultry   ,     Duck
Poultry   ,     Duck Liver
Vegetable   ,     Edamame Soybeans
Vegetable   ,     Eggplant
Poultry   ,     Emu
Vegetable   ,     Fennel
Vegetable   ,     Fiddleheads
Vegetable   ,     Ginger Root
Poultry   ,     Gizzards
Meat   ,     Goat
Poultry   ,     Goose
Poultry   ,     Goose Liver
Poultry   ,     Grouse
Poultry   ,     Guinea Hen
Meat   ,     Ham
Meat   ,     Horse
Vegetable   ,     Horseradish
Vegetable   ,     Jicama
Vegetable   ,     Kale
Meat   ,     Kangaroo
Vegetable   ,     Kohlrabi
Meat   ,     Lamb

unsortedFoodListB.txt
____________________________

GlutenFreeNuts   ,     Almonds
Gluten   ,     Amaranth
Fruits   ,     Avocado
Gluten   ,     Bagels
Gluten   ,     Barley
GlutenFreeNuts   ,     Baru Nuts
Fruits   ,     Beans
Gluten   ,     Beer
GlutenFreeNuts   ,     Black Walnuts
GlutenFreeNuts   ,     Brazil Nuts
Gluten   ,     Brewers yeast
Gluten   ,     bromated flour
Gluten   ,     Buckwheat
Gluten   ,     bulgur
Dairy   ,     Butter
Dairy   ,     Butter
GlutenFreeNuts   ,     Cacao
Gluten   ,     Candy or candy bars
GlutenFreeNuts   ,     Cashews
Dairy   ,     Cheese
Dairy   ,     Cheese
GlutenFreeNuts   ,     Chestnuts
Fruits   ,     Chickpeas
GlutenFreeNuts   ,     Chocolates & Sweets
Seafood   ,     Clams
GlutenFreeNuts   ,     Coconut
Fish   ,     Cod
Gluten   ,     Corn
Gluten   ,     Corn flakes
Gluten   ,     Cornbread
Gluten   ,     Crackers
Fruits   ,     Cucumbers
Dairy   ,     Cultured Dairy
Gluten   ,     durum
Gluten   ,     Egg noodles
Fruits   ,     Eggplant
Gluten   ,     Energy bars or granola bars
Gluten   ,     farina
Gluten   ,     Farro
Gluten   ,     farro
Fruits   ,     Flickr - threelayercakeCorn
Gluten   ,     Flour tortillas
Gluten   ,     French fries
Dairy   ,     Frozen Desserts
Gluten   ,     graham
Gluten   ,     Graham
Gluten   ,     Granola
Gluten   ,     Gravy
Fruits   ,     greek kalamata olives
Fruits   ,     green beans
GlutenFreeNuts   ,     Hazelnuts (Filberts)
Fish   ,     Herring
Dairy   ,     Ice Cream
Dairy   ,     Ice Cream
Gluten   ,     kamut
Seafood   ,     Lobster
GlutenFreeNuts   ,     Macadamia Nuts
Fish   ,     Mackerel
Gluten   ,     Malt extract
Gluten   ,     Malt syrup
Gluten   ,     Malt vinegar
Gluten   ,     Malted milk
Dairy   ,     Milk
Dairy   ,     Milk Powder
Dairy   ,     Milk Powder
Gluten   ,     Millet
GlutenFreeNuts   ,     Mixed Nuts
Gluten   ,     Montina
Seafood   ,     Mussels
GlutenFreeNuts   ,     Nut & Plant Based Milks
GlutenFreeNuts   ,     Nut Flours
GlutenFreeNuts   ,     Nut Powders
GlutenFreeNuts   ,     Nuts in Shell
Fruits   ,     Okra
Fruits   ,     Olives
GlutenFreeNuts   ,     Organic Nuts
Seafood   ,     Oysters
Fish   ,     Pacific halibut
Gluten   ,     Panko breadcrumbs

Answer 1

// SortMain.java

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;

public class SortMain {
    public static void main(String[] args) {
        sortFile("src/unsortedFoodListA.txt","src/sortedFoodListA.txt");
        sortFile("src/unsortedFoodListB.txt","src/sortedFoodListB.txt");
    }
    public static void sortFile(String inputFilename,String outputFilename) {
        try {
            BufferedReader reader = new BufferedReader(new FileReader(inputFilename));
            String[] lines=new String[1000];
            String line;
            int size=0;
            while((line=reader.readLine())!=null){
                lines[size++]=line;
            }
            for(int i=0;i<size;i++){
                for(int j=i;j<size;j++){
                    if(lines[i].split(",")[0].compareTo(lines[j].split(",")[0])<0){
                        String temp = lines[i];
                        lines[i] = lines[j];
                        lines[j]  = temp;
                    }
                }
            }
            BufferedWriter writer = new BufferedWriter(new FileWriter(outputFilename));
            for(int i=0;i<size;i++){
              writer.write(lines[i]+(i==size-1?"":"\n"));
            }
            writer.close();
        } catch (Exception e) {
            System.out.println("File IO Error");
        }

    }
}

//MergeFoodMain.java

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;

public class MergeFoodList {
    public static void main(String[] args) {
        mergeFoodList("src/sortedFoodListA.txt","src/sortedFoodListB.txt","src/mergedFoodFiles.txt");
    }

    private static void mergeFoodList(String inputFile1Name, String inputFile2Name, String outputFilename) {
        try {
            //File1 Reading
            BufferedReader reader = new BufferedReader(new FileReader(inputFile1Name));
            String[] inputFile1lines=new String[1000];
            String line;
            int inputFile1Size=0;
            while((line=reader.readLine())!=null){
                inputFile1lines[inputFile1Size++]=line;
            }
            reader.close();

            //file2 reading
            reader = new BufferedReader(new FileReader(inputFile2Name));
            String[] inputFile2lines=new String[1000];
            int inputFile2Size=0;
            while((line=reader.readLine())!=null){
                inputFile2lines[inputFile2Size++]=line;
            }
            //merged list file writing
            String[] outputLines =new String[2000];
            int i = 0; // file 1 index
            int j = 0; //file 2 index
            int k = 0; //output file index

           while(i<inputFile1Size&&j<inputFile2Size){
               if(inputFile1lines[i].split(",")[0].compareTo(inputFile2lines[j].split(",")[0])>0){
                   outputLines[k] = inputFile1lines[i++];
               }
               else {
                   outputLines[k] = inputFile2lines[j++];
               }
               k++;
           }
           while(i<inputFile1Size){
               outputLines[k++] = inputFile1lines[i++];
           }
           while(j<inputFile2Size){
               outputLines[k++]=inputFile2lines[j++];
           }


            BufferedWriter writer = new BufferedWriter(new FileWriter(outputFilename));
            for(int i1=0;i1<k;i1++){
                writer.write(outputLines[i1]+(i1==k-1?"":"\n"));
            }
            writer.close();
        } catch (Exception e) {
            System.out.println("File IO Error");
        }
    }
}

//First Run the SortMain

//Then Run MergeFoodList

// output Files