Answered Essay: IN JAVA: . The encryption program should work like a filter, reading the contents of one file, modifying the data into code, and then

IN JAVA: . The encryption program should work like a filter, reading the contents of one file, modifying the data into code, and then writing the code contents out to a second file. The second file will be a version of the first file, but written in a secret code. Although there are complex encryption techniques, you should come up with a simple one of your own. For example, you could read the first file one character at a time and add 10 to the character code of each character before it is written to the second file.

I HAVE THE FOLLOWING CODE, I know it doesnt follow the instructions but I want it to be able to get input from the user as well, so I just want you to incorporate the intructions above to my original code. thank you. also im using Java JOptionPane swing function.





import java.util.*;

import javax.swing.JOptionPane;

//ROT encryption algorithm is implemented

public class Project {

public static void main(String args[]) throws IOException {


Scanner scan = new Scanner(;

String letter = “”;

String rotValue = “”;

Project proj = new Project();

if(args.length >= 1) {

for (String arg : args) {

letter += arg + ” “;



else {

String input = JOptionPane.showInputDialog(“Enter your phrase: “);

letter= input;



rotValue = proj.convert(letter);

JOptionPane.showMessageDialog(null,”” + rotValue);



public String convert(String str) throws IOException {

FileInputStream fis;

fis = new FileInputStream(“D:/text.txt”);

InputStreamReader isr = new InputStreamReader(fis);

BufferedReader br = new BufferedReader(isr);


String readline = “”;

readline = br.readLine();

while(readline != null)



readline = br.readLine();


StringBuilder val = new StringBuilder();

for(char a:str.toCharArray()) {

if(a >= ‘A’ && a <= ‘Z’) {

a += 13;

if(a > ‘Z’) {

a -= 26;



else if(a >= ‘a’ && a <= ‘z’) {

a += 13;

if(a > ‘z’) {

a -= 26;





return val.toString();




please upload new code with output of the program . thanks.

Expert Answer


import java.util.*;






import javax.swing.*;

class Encr


public static void main(String args[])


String s,s1;

s=JOptionPane.showInputDialog(“Enter Source File Name “);

s1=JOptionPane.showInputDialog(“Enter a File Name Where we need to copy”);

int i;

i=Integer.parseInt(JOptionPane.showInputDialog(“Enter a Value By Which You Wanna


try {

FileInputStream fis = new FileInputStream(s);

OutputStream os = new FileOutputStream(s1);

char current;

while (fis.available() > 0) {

current = (char);

int x=(int)current;

if(current!=’ ‘&&x!=10&&x!=13)


else if(x!=10&&x!=13)



} catch (IOException e) {





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