/* * The java program that prompts user to * enter a string and shift key and then * converts the string to the encoded string * and prints the encoded string value to console. * */ //CeaserCipher.java import java.util.Scanner; public class CeaserCipher { public static void main(String[] args) { Scanner scanner=new Scanner(System.in); String message; int shift; System.out.println(\"Enter a message in small letters,a-z\"); message=scanner.nextLine(); System.out.println(\"Enter shift value\"); shift=scanner.nextInt(); //calling encode method with message, shift value String encodedMsg=encode(message,shift); //calling WriteMessage WriteMessage(encodedMsg); } /*Method that prints the encoded text to console*/ private static void WriteMessage(String encodedMsg) { System.out.println(\"Encoded text :\"+encodedMsg); } //Method that takes string and integer value and returns //the encoded string to calling method private static String encode(String message, int shift) { StringBuffer sb=new StringBuffer(message); for (int i = 0; i < message.length(); i++) { //shift to back to the alphabets char encodedkey = (char) (\'a\' + (message.charAt(i) -\'a\' + shift) % (\'z\' - \'a\' + 1)); //set character at index,i sb.setCharAt(i, encodedkey); } //return encoded string to calling method return new String(sb); } } Sample Output: Enter a message in small letters,a-z sunday is holiday Enter shift value 5 Encoded text :xzsifdYnxYmtqnifd Solution /* * The java program that prompts user to * enter a string and shift key and then * converts the string to the encoded string * and prints the encoded string value to console. * */ //CeaserCipher.java import java.util.Scanner; public class CeaserCipher { public static void main(String[] args) { Scanner scanner=new Scanner(System.in); String message; int shift; System.out.println(\"Enter a message in small letters,a-z\"); message=scanner.nextLine(); System.out.println(\"Enter shift value\"); shift=scanner.nextInt(); //calling encode method with message, shift value String encodedMsg=encode(message,shift); //calling WriteMessage WriteMessage(encodedMsg); } /*Method that prints the encoded text to console*/ private static void WriteMessage(String encodedMsg) { System.out.println(\"Encoded text :\"+encodedMsg); } //Method that takes string and integer value and returns //the encoded string to calling method private static String encode(String message, int shift) { StringBuffer sb=new StringBuffer(message); for (int i = 0; i < message.length(); i++) { //shift to back to the alphabets char encodedkey = (char) (\'a\' + (message.charAt(i) -\'a\' + shift) % (\'z\' - \'a\' + 1)); //set character at index,i sb.setCharAt(i, encodedkey); } //return encoded string to calling method return new String(sb); } } Sample Output: Enter a message in small letters,a-z sunday is holiday Enter shift value 5 Encoded text :xzsifdYnxYmtqnifd.

1. /*
* The java program that prompts user to
* enter a string and shift key and then
* converts the string to the encoded string
* and prints the encoded string value to console.
* */
//CeaserCipher.java
import java.util.Scanner;
public class CeaserCipher
{
public static void main(String[] args)
{
Scanner scanner=new Scanner(System.in);
String message;
int shift;
System.out.println("Enter a message in small letters,a-z");
message=scanner.nextLine();
System.out.println("Enter shift value");
shift=scanner.nextInt();
//calling encode method with message, shift value
String encodedMsg=encode(message,shift);
//calling WriteMessage
WriteMessage(encodedMsg);
}
/*Method that prints the encoded text to console*/
private static void WriteMessage(String encodedMsg)
{
System.out.println("Encoded text :"+encodedMsg);
}
//Method that takes string and integer value and returns
//the encoded string to calling method

2. private static String encode(String message, int shift)
{
StringBuffer sb=new StringBuffer(message);
for (int i = 0; i < message.length(); i++)
{
//shift to back to the alphabets
char encodedkey = (char) ('a' + (message.charAt(i) -'a' + shift) % ('z' - 'a' + 1));
//set character at index,i
sb.setCharAt(i, encodedkey);
}
//return encoded string to calling method
return new String(sb);
}
}
Sample Output:
Enter a message in small letters,a-z
sunday is holiday
Enter shift value
5
Encoded text :xzsifdYnxYmtqnifd
Solution
/*
* The java program that prompts user to
* enter a string and shift key and then
* converts the string to the encoded string
* and prints the encoded string value to console.
* */
//CeaserCipher.java
import java.util.Scanner;
public class CeaserCipher
{
public static void main(String[] args)

3. {
Scanner scanner=new Scanner(System.in);
String message;
int shift;
System.out.println("Enter a message in small letters,a-z");
message=scanner.nextLine();
System.out.println("Enter shift value");
shift=scanner.nextInt();
//calling encode method with message, shift value
String encodedMsg=encode(message,shift);
//calling WriteMessage
WriteMessage(encodedMsg);
}
/*Method that prints the encoded text to console*/
private static void WriteMessage(String encodedMsg)
{
System.out.println("Encoded text :"+encodedMsg);
}
//Method that takes string and integer value and returns
//the encoded string to calling method
private static String encode(String message, int shift)
{
StringBuffer sb=new StringBuffer(message);
for (int i = 0; i < message.length(); i++)
{
//shift to back to the alphabets
char encodedkey = (char) ('a' + (message.charAt(i) -'a' + shift) % ('z' - 'a' + 1));
//set character at index,i
sb.setCharAt(i, encodedkey);
}
//return encoded string to calling method

4. return new String(sb);
}
}
Sample Output:
Enter a message in small letters,a-z
sunday is holiday
Enter shift value
5
Encoded text :xzsifdYnxYmtqnifd