code: public void replaceColumnValues(String column, HashMap<String, String> values) throws Exception {
  		for (String row : rowLookup.keySet()) {
  			String oldValue = this.getCell(row, column);
  			String newValue = values.get(oldValue);
  			this.addCell(row, column, newValue);
  		}
  
  	}
docs: Change values in a column where 0 = something and 1 = something different
  
  @param column
  @param values
  @throws Exception