Checking each character for a number

Question

I am trying to loop through a string and check each character if one of the characters is a number. If it is a number, I want to return it as true. I have a string \"crash\"

Answer 1

Well you can use Integer.parseInt("string") and catch the exception.

try {
     int num = Integer.parseInt("string");
     return true;
} catch (NumberFormatException nfe) {
     return false;
}

Or another way with regEx:

if ("string".replaceAll("\\d+","").length() > 0) { 
    //false 
} else { 
    //true
}