Regex for java's String.matches method?

Basically my question is this, why is:

String word = "unauthenticated";
word.matches("[a-z]");

returning false? (Developed in java1.6)

Basicall开发者_开发百科y I want to see if a string passed to me has alpha chars in it.

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The String.matches() function matches your regular expression against the whole string (as if your regex had ^ at the start and $ at the end). If you want to search for a regular expression somewhere within a string, use Matcher.find().

The correct method depends on what you want to do:

1. Check to see whether your input string consists entirely of alphabetic characters (String.matches() with [a-z]+)
2. Check to see whether your input string contains any alphabetic character (and perhaps some others) (Matcher.find() with [a-z])

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Your code is checking to see if the word matches one character. What you want to check is if the word matches any number of alphabetic characters like the following:

word.matches("[a-z]+");

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with [a-z] you math for ONE character.

What you’re probably looking for is [a-z]*