Q:

Implement a decoder for the Caesar cipher where N = 5

belongs to collection: java exercises (medium level )

mahmoud2506
Save to bookmark
|
2022-04-28
|
  187 
Medium
0

The Ceasar cipher is a basic encryption technique used by Julius Ceasar to securely communicate with his generals. Each letter is replaced by another letter N positions down the english alphabet. For example, for a rotation of 5, the letter c would be replaced by an h. In case of a z, the alphabet rotates and it is transformed into a d.
Implement a decoder for the Caesar cipher where N = 5.
TIP: Use code.toCharArray() to get an array of characters.

Java programming, quiz questions, Java programming quiz-questions,
login and add your own answer to this question

All Answers

mahmoud2506
2022-04-28
need an explanation for this answer? contact us directly to get an explanation for this answer 

public String decode(String code) {
String decoded = "";
int lastCharValue = 'z';
int alphabetLength = 'z' - 'a' + 1;
for (char character: code.toCharArray()) {
    int charNoRotation = character + 5;
    int charValue = charNoRotation < lastCharValue ? charNoRotation : charNoRotation - alphabetLength;
    decoded += (char) charValue;
}
return decoded;
}

need an explanation for this answer? contact us directly to get an explanation for this answer

total answers (1)

java exercises (medium level )
This question belongs to these collections

Similar questions

need a help?

find thousands of online teachers now
Write a method that returns a comma-separated stri... >>
<< Write a method that checks if there is at least on...