src/org/tiefaces/components/websheet/utility/WebSheetUtility.java
public static String removeSheetNameFromFullCellRefName(
			final String fullName) {
		if ((fullName != null) && (fullName.contains("!"))) {
			return fullName.substring(fullName.indexOf('!') + 1);
		}
		return fullName;
	}
public static String removeSheetNameFromFullCellRefName(
			final String fullName) {
		if ((fullName != null) && (fullName.contains("!"))) {
			return fullName.substring(fullName.indexOf('!') + 1);
		}
		return fullName;
	}
remove sheet name from cell full name e.g. return $A$1 from Sheet1$A$1

@param fullName
the full name
@return remove Sheet Name from full name