src/org/kocakosm/pitaya/charset/ASCII.java
public static boolean isAlphabetic(String str)
	{
		for (char c : str.toCharArray()) {
			if (!isLetter(c)) {
				return false;
			}
		}
		return true;
	}
public static boolean isAlphabetic(String str)
	{
		for (char c : str.toCharArray()) {
			if (!isLetter(c)) {
				return false;
			}
		}
		return true;
	}
Returns whether the given {@code String} is an alphabetic sequence,
that is, a sequence which only contains letters.

@param str the {@code String} to test.

@return whether the given {@code String} is an alphabetic sequence.

@throws NullPointerException if {@code str} is {@code null}.