JavaDoc

/**

* Returns the character at the specified index. An index

* ranges from <codeɬ</code> to <code>length() - 1</code>.

* @param index the index of the desired character.

* @return the desired character.

* @exception StringIndexOutOfRangeException

* if the index is not in the range <codeɬ</code>

* to <code>length()-1</code>.

* @see java.lang.Character#charValue()

public char charAt(int index) {

...

}