Question

Create a random access Java program to insert 3 missing words into a text file. You will be supplied with the missing words, which you may hard code in your program. You need to determine from the given text file where the words should be placed!
Missing words are:
details
populate
determine

Randominput.txt
Create a class to hold the x_x_x_x of a new vehicle (include make, model, type, color, number of doors and price as a minimum). Include an ___init___ method to x_x_x_x_ the class object and methods to display the vehicle details and also to calculate the payment based on interest rate, down payment and months of loan. Use a simple interest calculation to x_x_x_x_x the loan details.

Answer 1

Code:

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.nio.charset.Charset;

public class InsertInFile {
  
   //main method
   public static void main(String[] args) {
       //declaring variables
       String line;
       //this is search sequence for fill in the blanks
       String searchSequence="x_x_x_x";
       //words to be replaced you can change based on question
       String wordToReplace[]={"details","populate","determine"};
       //taking initial finaloutput as empty string
       String finalOutput="";
       //count will be used for total number of words i.e. 3
       int count=0;
       //this will be used so that no space will come in front of line line. e.g. " Count" is wrong it should be "Count" for the first word of line
       int wordCountOfline=1;
       try (
           //creating inputstream and bufferedreader to read from file
       InputStream fis = new FileInputStream("Randominput.txt");
       InputStreamReader isr = new InputStreamReader(fis, Charset.forName("UTF-8"));
       BufferedReader br = new BufferedReader(isr);
       ) {
           //loop untill all lines are read..lines will be read one by one
       while ((line = br.readLine()) != null) {
           //split line in words
           String[] words = line.split(" ");
           for (String word : words)
           {
               //foreach word check it will match fill in the blank character
               if(word.contains(searchSequence) && count<3)
               {
                   //if yes then check if word is starting of line
                   if(wordCountOfline==1)
                   {
                       //if yes then add replaced word without space
                   finalOutput=finalOutput+wordToReplace[count];
                   }else{
                       //if no then add replaced word with space
                       finalOutput=finalOutput+" "+wordToReplace[count];
                   }
                   count++;
               }else{
                   //if word does not match fill in the blank charcter then just add to final output
                   if(wordCountOfline==1)
                   {
                   finalOutput=finalOutput+word;
                   }else{
                       finalOutput=finalOutput+" "+word;
                   }
               }
               //increase word count
               wordCountOfline++;
           }
           //add new line characterat the end of line
           finalOutput=finalOutput+System.lineSeparator();
           wordCountOfline=1;
       }
       //opening printwriter to print output
       PrintWriter outputToFile = new PrintWriter("Randominput.txt");
       outputToFile.println(finalOutput);
       //close file
       outputToFile.close();
       //also print output to console
       System.out.println(finalOutput);
       } catch (FileNotFoundException e) {
           // TODO Auto-generated catch block
           System.out.println("SomeThingWrong"+e.getMessage());
           e.printStackTrace();
       } catch (IOException e) {
           // TODO Auto-generated catch block
           System.out.println("SomeThingWrong"+e.getMessage());
       }

   }

}

Output: