โค้ด JAVA นี้ เป็นโปรแกรมที่ใช้ทำอะไรครับ

// JavaScript Document
class QuestionProgramming{
        public static void main(String args[]){
        Scanner input = new Scanner(System.in);
        System.out.print("Input message : ");
        String message = input.nextLine();
        String result = "";
        for(int i =1; i<message.length();i++){
            if(message.substring(i-1,i).equalsIgnoreCase(message.substring(i,i+1))){
                    continue;
            }else{
                    if(i==1){
                            result = result + message.substring(0,i);
                    }
                    result = result + message.substring(i,i+1);
            }
        }
        System.out.println("Your secret : " + result);
        }
}