public class Program { public static void main(String[] args) { } // (Optional) You may use the following as a helper method for part (b) // Build and return a HashMap that sends strings to row indexes such // that the HashMap allows you to lookup the index of a row that // contains a specified string value in column 'label'. private static Map createHashMap(Table A, String label){ HashMap newHashMap = new HashMap<>(); int i = 0; for (List row: A.rows){ for (String key: row.data){ if (key.get[i].equals(label)){ newHashMap.put(key, i++); } } } return newHashMap; } } public class Row { String[] data; public Row(String[] data) { this.data = data; } public String get(int i) { return data[i]; } public int size() { return data.length; } } public class Table { private Map labels; private List rows; public Table(Map labels, List rows) { this.labels = labels; this.rows = rows; } public Table(String filename) { rows = new ArrayList(); load(filename); } public Map labelMap(){ return labels; } public String getCell(int index, String label) { if(labels.get(label) == null) { return null; } else { return rows.get(index).get(labels.get(label)); } } public int size() { return rows.size(); } private void load(String filename) { try{ String currentDirectory = System.getProperty("user.dir") + "/"; // System.out.println(currentDirectory); BufferedReader bf = new BufferedReader(new FileReader(currentDirectory + filename)); // Parse labels labels = parseLabels(bf.readLine()); // Parse rows String line; while((line = bf.readLine()) != null) { rows.add(parseRow(line)); } bf.close(); } catch(IOException e){ System.out.println("File '" + filename + "' not found."); } } private Map parseLabels(String line) { Map labels = new HashMap(); String[] tokens = line.split(","); for(int i = 0; i < tokens.length; i++) { labels.put(tokens[i], i); } return labels; } private Row parseRow(String line) { return new Row(line.split(",")); } // This is for debugging purposes public String toString() { String[] labelsArray = labels.keySet().toArray(new String[0]); Arrays.sort(labelsArray); String[] rowsArray = new String[this.size()]; for(int i = 0; i < this.size(); i++) { rowsArray[i] = ""; for(int j = 0; j < labelsArray.length; j++) { rowsArray[i] += this.getCell(i, labelsArray[j]) + "|"; } } Arrays.sort(rowsArray); return Arrays.toString(rowsArray); } }

My code 2018/11/29 10:41