code: public static Integer isInteger(String value) {
  		Validate.notNull(value);
  		Validate.notEmpty(value);
  		Integer intValue = null;
  		try{
  			intValue = 	Integer.parseInt(value);
  		} catch(NumberFormatException e){
  			throw new TypeException("Integer");
  		}
  		return intValue;
  	}
docs: Checks if the given String is an integer value.
  @param value The String value to validate.
  @return The parsed integer value.
  @throws ParameterException if the given String value cannot be parsed as integer.