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String to Uppercase Program - Java Programs

Define a class to accept a string and convert the same to uppercase. Create and display the new string by replacing each vowel by immediate next character and every consonant by the previous character. The other characters remain the same.

Example:
Input: #IMAGINATION@2024
Output: #JLBFJMBSJPM@2024

Java

import java.util.Scanner;
class Change{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        System.out.print("Enter the string: ");
        String s = in.nextLine().toUpperCase();
        String t = "";
        for(int i = 0; i < s.length(); i++){
            char ch = s.charAt(i);
            if(Character.isLetter(ch)){
                if("AEIOU".indexOf(ch) >= 0)
                    t += (char)(ch + 1);
                else
                    t += (char)(ch - 1);
            }
            else
                t += ch;
        }
        System.out.println(t);
    }
}

Output

 
OUTPUT 1:
Enter the string: #IMAGINATION@2024
#JLBFJMBSJPM@2024

OUTPUT 2:
Enter the string: THIS IS A JAVA PROGRAM
SGJR JR B IBUB OQPFQBL