TO IMPLEMENT GENERAL CAESAR CIPHER IN JAVA

import java.util.*;

public class gencaesar
{
public static void main(String[] args) throws Exception
{
String input,output;
String a,b;
Scanner sc= new Scanner(System.in);

System.out.println("Enter the message");
input=sc.nextLine();
char array[]=input.toCharArray();
int key,i=0;
System.out.println("Enter the key");
key=sc.nextInt();
//adding the key
for(i=0;i<array.length;i++)
{
array[i]+=key;
if(array[i]>=90)
{
array[i]-=26;
}
if(array[i]>=129)
{
array[i]-=64;
}

}
//printing output
System.out.println("General Caesar Cipher: \n");
for(i=0;i<array.length;i++)
{
System.out.print(array[i]);

}
System.out.println();

//decyption
for(i=0;i<array.length;i++)
{
array[i]-=key;
if(array[i]>=129)
{
array[i]-=64;
}
if(array[i]>='Z' && array[i]<='a')
{
array[i]-=26;
}

}

//printing output
System.out.println("DECRYPTED PLAIN: \n");
for(i=0;i<array.length;i++)
{
//System.out.print(array[i]);

}
System.out.println(input);

//PROGRAM IS CODED BY 6483
}
}
/*
bash-3.00$ javac gencaesar.java
Enter the message
bash-3.00$ javac gencaesar.java
bash-3.00$ java gencaesar
Enter the message
xyz
Enter the key
5
General Caesar Cipher:

cde
DECRYPTED PLAIN:

xyz

*/