PhoneBook.java

PhoneBook.java

// PhoneBook.java
 
public class PhoneBook {
  Map<String, List<String>> map = new HashMap<String, List<String>>();
 
  public void load(String filename) throws IOException {
    try {
      BufferedReader r = Files.newBufferedReader(Paths.get(filename));
 
      String line = null;
      while ((line = r.readLine()) != null) {
        String[] values = line.split(",");
 
        List<String> list = map.get(values[0]);
        if (list == null) {
          list = new ArrayList<String>();
        }
        list.add(values[1]);
        map.put(values[0], list);
      }
      r.close();
    } catch (FileNotFoundException e) {
      throw e;
    } catch (IOException e) {
      throw e;
    }
  }
}