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ROT47Cipher.java
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ROT47Cipher.java
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public class ROT47Cipher {
static char[] characters = "!\"#$%&\\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~".toCharArray();
final static int countShiftCharacter = characters.length / 2;
public static StringBuilder encryption(StringBuilder plainText)
{
plainText = new StringBuilder(plainText.toString().trim().toLowerCase());
StringBuilder cipherText=new StringBuilder();
for(char characterInTheText:plainText.toString().toCharArray())
{
cipherText.append(ShiftCharacter(characterInTheText));
}
return cipherText;
}
public static StringBuilder decryption(StringBuilder cipherText)
{
StringBuilder plainText=new StringBuilder();
for(char characterInTheText:cipherText.toString().toCharArray())
{
plainText.append(ShiftCharacter(characterInTheText));
}
return plainText;
}
public static Character ShiftCharacter(Character character)
{
int count=0;
while(count<countShiftCharacter)
{
if(character==characters[characters.length-1])
character=characters[0];
else
character++;
count++;
}
return character;
}
public static void main(String[] args)
{
StringBuilder plainText = new StringBuilder("[software engineering 2018-2019] !!");
System.out.println("Metnin Acik Hali :"+plainText);
StringBuilder cipherText = encryption(plainText);
System.out.println("Metnin Sifrelenmis Hali :"+cipherText);
plainText = decryption(cipherText);
System.out.println("Metnin Acik Hali :"+plainText);
}
}