Question

Hello basically I tried to use this code

    for(int character=0; character<roomNo.length(); character++){
        if((Character.isDigit(roomNo.charAt(character)))) {
        }
    }
    return true;

To loop through a String and see if it contains any numbers. I’m trying to create a method that checks whether a String is numeric, if it is the method should return true. So far it doesn’t work? Any help would be appreciated 🙂

Answer 1

Try this:

    for(int character=0; character<roomNo.length(); character++){
    if(!Character.isDigit(roomNo.charAt(character))) {
         return false;
    }
}
return true;

Or as others have said, use regular expressions