Java Java Data Structures Efficiency! Using a Map to store Contact Methods

Juan Santiago
Juan Santiago
3,766 Points

I'm totally lost :(

I don't know where to start.

I understand that the "addContactMethods" method needs to add a new method to call a contact. That's all D:

com/example/model/Contact.java
package com.example.model;

import java.util.Map;
import java.util.Set;
import java.util.HashMap;

public class Contact {
  private String mFirstName;
  private String mLastName;
  private Map<String, String> mContactMethods;

  public Contact(String firstName, String lastName) {
    mFirstName = firstName;
    mLastName = lastName;
    /* This stores contact methods by name
     * eg:  "phone" => "(555) 555-1234"
     */
    mContactMethods = new HashMap<String, String>();
  }

  public void addContactMethod(String method, String value) {
    // TODO: Add to the contact method map

    mContactMethods.add();
  }

  /**
   * Returns the available contact methods.  eg: phone, pager,
   *
   * @return The name of the contact methods that are available
   */
  public Set<String> getAvailableContactMethods() {
    // FIXME: This should return the current contact method names.
    return null;
  }

  /**
   * Returns the value for the contact method if it exists, 
   *
   * @param methodName  The name of the contact method to look up.
   * @return The name of the contact methods that are available
   */
  public String getContactInfo(String methodName) {
    // FIXME: return the value for the passed in *methodName*
    return null;
  }

  public String getFirstName() {
    return mFirstName;
  }

  public String getLastName() {
    return mLastName;
  }

}

1 Answer

Allan Clark
MOD
Allan Clark
Treehouse Moderator 10,691 Points

No worries man you are so super close as it is. Remember Lists use add(), Maps use put(). (that still gets me too) Try this:

mContactMethods.put(method, value);
Juan Santiago
Juan Santiago
3,766 Points

Man, I fell so silly now hahahaha. Thank you so much.