I have a string and want to make sure it does not contain digits. Is there a method in the String library that does it or i have to implement it myself?
You could use string.matches function to check for whether a string contains at-least one digit or not.
string.matches("\\D+");
This will return true for the strings which won't contain any single digit. \\D matches any non-digit character. So, \\D+ matches one or more non-digit characters. By passing it to matches method, it would apply the regex against the whole string.
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