public static boolean isAlphabetic(final char c) {
		return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
	}
Create a new tokenizer from the given character sequence.

@param input the input character sequence
@throws NullPointerException if the given {@code input} is {@code null}
jenetics.ext/src/main/java/io/jenetics/ext/internal/parser/CharSequenceTokenizer.java