@Override
public void changeDetails() throws Exception {

    sendMessage(2); // send a tag number of a method before sending object
    int option;
    input = new Scanner(System.in); // user input stream, object will be dereferenced when method returns

    do{
        System.out.println("Choose from these choices");
        System.out.println("-------------------------n");
        System.out.println("1 - Changed Name");
        System.out.println("2 - Change Surname");
        System.out.println("3 - Change Address");
        System.out.println("4 - Change Password");
        System.out.println("0 - Exit");

        option = input.nextInt(); // takes input normally
        sendMessage(option); // tell server what peace of information to process
        switch(option){
            case 1: System.out.println("Enter new name: ");
                    sendMessage(input.nextLine()); // but skips this input and expecting nextInt input from above again
                    break;
            case 2: System.out.println("Enter new surname: ");
                    sendMessage(input.nextLine());
                    break;
            case 3: System.out.println("Enter new address: ");
                    sendMessage(input.nextLine());
                    break;
            case 4: System.out.println("Enter new password: "); // good practice to ask for old password and check                                  // before allowing password to be changed
                    sendMessage(input.nextLine());
                    break;
        }

        System.out.println(receiveMessage());// waiting for response from server
    }while(option != 0);

    sendMessage(0); // tell server that editing is done
}