Utility function to prepend,append and trim zeros to a string

PrependAppendTrimZeros

public static String prependZero(String givenStr,int expectedLength){
	if(StringUtils.isNotEmpty(givenStr)&&givenStr.length()>=expectedLength){
		return givenStr;
	}
	return prependZero("0"+givenStr,expectedLength);
}

public static String appendZero(String givenStr,int expectedLength){
	if(StringUtils.isNotEmpty(givenStr)&&givenStr.length()>=expectedLength){
		return givenStr;
	}
	return appendZero(givenStr+"0",expectedLength);
}

public static String trimLeadingZeros(String givenString){
	return givenString.replaceFirst("^0+(?!$)", "");
}