Answered Essay: IN JAVA: .Use and implement the RC4 cipher. The encryption program should work like a filter, readin

IN JAVA: .Use and implement the RC4 cipher. 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.

I am using Netbeans IDE so please give me something that works on Netbeans.and attach screenshot of ouput of working program with the answer thanks.

Expert Answer

 

Answer:
1. Create the input file with characters as input as mentioned in screen shot.
2. Create the output file with name mentioned in program.
3 . This logic will add 10 to each character.
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
public class EnFileExample {
private static final String FILENAME_IN = “E:\test\filenameIN.txt”;
private static final String FILENAME_OUT = “E:\test\filenameOUT.txt”;
public static void writeData(ArrayList list) {
BufferedWriter objBufferedWriter = null;
FileWriter objFileWriter = null;
try {
objFileWriter = new FileWriter(FILENAME_OUT);
objBufferedWriter = new BufferedWriter(objFileWriter);
String ff = list.toString().replace(“[“, “”);
objBufferedWriter.write(ff.replace(“]”, “”));
System.out.println(“Done”);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (objBufferedWriter != null)
objBufferedWriter.close();
if (objFileWriter != null)
objFileWriter.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
public static void main(String[] args) {
BufferedReader objBufferedReader = null;
FileReader objFileReader = null;
ArrayList list = new ArrayList();
try {
objFileReader = new FileReader(FILENAME_IN);
objBufferedReader = new BufferedReader(objFileReader);
String objSCurrentLine;
while ((objSCurrentLine = objBufferedReader.readLine()) != null) {
char objC = objSCurrentLine.charAt(0);
int objSc = (int) objC;
char c = (char) ((char)objSc + 10);
list.add(c);
}
writeData(list);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (objBufferedReader != null)
objBufferedReader.close();
if (objFileReader != null)
objFileReader.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
}

Output screenshot:

Input file:

Output file:

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