reate an inputfile named \"inputFile.txt\" (use \"Note Pad\") that contains the

Question

reate an inputfile named "inputFile.txt" (use "Note Pad") that contains the following data. Be sure that the last line of the file is empty (i.e., not even a space character). In other words, after entering the second line of data, press the <ENTER> key, save the file, then exit the editor.

5 10 6 9
23 7 13 40

Implement the following algorithm

Create & Open inputFile
Create & Open outputFile
Read first line of data into variables a, b, c, d
DOWHILE !EOF
     Create a unique formula that uses the variables a, b, c, & d. For example,
     value = (a*a) + b - c + d
     Output value into outputFile
     Read each line of data into variables a, b, c, d
ENDDO
Close inputFile
Close outputFile

Explanation / Answer

import java.io.*;

public class sample
{
    public static void main(String[] args)
    {
       System.out.println("Reading File from Java code");
       //Name of the file to read. Please note place the input file in same directory from were you are executing this program otherwise give full path of file.
       String fileName="inputFile.txt";
       try{

          //Create object of FileReader
          FileReader inputFile = new FileReader(fileName);

          //Instantiate the BufferedReader Class
          BufferedReader bufferReader = new BufferedReader(inputFile);

          //Variable to hold the one line data
          String line;
          // Instantiate the BufferedWritter Class.Please note place the output file in same directory from were you are executing this program otherwise give full path of file.

          BufferedWriter output = new BufferedWriter(new FileWriter("outputFile.txt"));

          // Read file line by line
          while ((line = bufferReader.readLine()) != null)   {
            /* line.split() methods splits the line using delimiter passed in argument. Here I passed space as delimiter because in input file every line will be written as 1 2 3 4 ie every two integer has space between them. So it will create array of type string with all the four values.*/
          
            String []array=line.split(" ");
            // array contains values in string format So first it needs to convert in to integer then only we can do calculations on them.
            int a=   Integer.parseInt(array[0]);
            int b=   Integer.parseInt(array[1]);
            int c=   Integer.parseInt(array[2]);
            int d=   Integer.parseInt(array[3]);
            int value=(a*a) + b - c + d;
          
            // It will write output value in output file
            output.write(value);
          
          
          }
          //Close the buffer reader/writer streams
          bufferReader.close();
          output.close();
       }catch(Exception e){
          System.out.println("Error while reading file line by line:" + e.getMessage());                    
       }

     }
}

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