Question

This is JAVA PROGRAMMING

Sort the contents of the two files in ascending order and combine them into one new file (words.txt).
When comparing string order, you must use the compareTo method and make an exception.The source code below is a code that only combines files. Use the comparedTo method to sort the contents of the two files in ascending order.(ex. if(str1.compareTo(str2)<0) {})

<file1.txt>

at first  
castle  
consider  
considerable  
enlighten  
explain  
explanation  
female  

<file2.txt>

consideration  
considering that  
education  
educational  
endow  
inherit  

<code>

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

public class Lab7_1 {

   public static void main(String[] args) {
       // TODO Auto-generated method stub
      
       fileMerge("file1.txt","file2.txt","words.txt");
   }
   private static void fileMerge(String filename1, String filename2, String filename3) {
       // TODO Auto-generated method stub
       Scanner str1=null;
       Scanner str2=null;
       PrintWriter output=null;
      
       try {
           str1 = new Scanner(new File(filename1));
               str2 = new Scanner(new File(filename2));
               output = new PrintWriter(new File(filename3));
              
               fileWriter(str1,output);
               fileWriter(str2,output);
              
          
      
       } catch (FileNotFoundException e) {
           // TODO Auto-generated catch block
           System.err.println(e.getMessage());
           // e.printStackTrace();
      
       } finally {
           if (str1 != null)
               str1.close();
           if (str2 != null)
               str2.close();
           if (output != null)
               output.close();

       }
   }
       private static void fileWriter(Scanner str1, PrintWriter output) {
           // TODO Auto-generated method stub
           while(str1.hasNextLine()) {
               String str = str1.nextLine();
               output.println(str);
       }

   }

          
   }

Answer 1

Code For Above Problem:

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

public class Lab7_1 {

        public static void main(String[] args) {
                // TODO Auto-generated method stub

                fileMerge("file1.txt", "file2.txt", "words.txt");
        }

        private static void fileMerge(String filename1, String filename2, String filename3) {
                // TODO Auto-generated method stub
                Scanner str1 = null;
                Scanner str2 = null;
                PrintWriter output = null;

                try {
                        str1 = new Scanner(new File(filename1));
                        str2 = new Scanner(new File(filename2));
                        output = new PrintWriter(new File(filename3));

                        fileWriter(str1, str2, output);

                } catch (FileNotFoundException e) {
                        // TODO Auto-generated catch block
                        System.err.println(e.getMessage());
                        // e.printStackTrace();

                } finally {
                        if (str1 != null)
                                str1.close();
                        if (str2 != null)
                                str2.close();
                        if (output != null)
                                output.close();

                }
        }

        /**
         * 
         * @param str1   Scanner for file1.txt
         * @param str2   Scanner for file2.txt
         * @param output PrintWriter for words.txt file
         */
        private static void fileWriter(Scanner str1, Scanner str2, PrintWriter output) {
                // TODO Auto-generated method stub
                String s1 = null;// get the words from file1
                String s2 = null;// get the words from file2
                if (str1.hasNextLine()) {
                        s1 = str1.nextLine();
                }
                if (str2.hasNextLine()) {
                        s2 = str2.nextLine();
                }

                while (s1 != null && s2 != null) {
                        if (s1.compareTo(s2) < 0) {
                                output.println(s1);
                                if (str1.hasNextLine())
                                        s1 = str1.nextLine();
                                else {
                                        s1 = null;
                                }
                        } else if (s1.compareTo(s2) > 0) {
                                output.println(s2);
                                if (str2.hasNextLine())
                                        s2 = str2.nextLine();
                                else {
                                        s2 = null;
                                }
                        }
                }

                // for remaining words in File1
                while (s1 != null) {
                        output.println(s1);
                        if (str1.hasNextLine())
                                s1 = str1.nextLine();
                        else {
                                s1 = null;
                        }
                }

                // for remaining words in File2
                while (s2 != null) {
                        output.println(s2);
                        if (str2.hasNextLine())
                                s2 = str1.nextLine();
                        else {
                                s2 = null;
                        }
                }

        }

}

<file1.txt>

at first  
castle  
consider  
considerable  
enlighten  
explain  
explanation  
female  

<file2.txt>

consideration  
considering that  
education  
educational  
endow  
inherit  

<Words.txt>

at first
castle
consider
considerable
consideration
considering that
education
educational
endow
enlighten
explain
explanation
female
inherit

Image Of <words.txt>:(Result After running Above Code)