Handling errors - Objects First with Java: A Practical Introduction Using BlueJ - page 416

Code 12.1
continued
The AddressBook
class

public ContactDetails[] search(String keyPrefix)
{

List<ContactDetails> matches =
new LinkedList<ContactDetails>();
// Find keys that are equal-to or greater-than the prefix.
SortedMap<String, ContactDetails> tail =
book.tailMap(keyPrefix);
Iterator<String> it = tail.keySet().iterator();
boolean endOfSearch = false ;
while (!endOfSearch && it.hasNext()) {
String key = it.next();
if (key.startsWith(keyPrefix)) {
matches.add(book.get(key));

}
else {
// As the list is sorted, no more will be found.
endOfSearch = true ;

}

}
ContactDetails[] results =
new ContactDetails[matches.size()];
matches.toArray(results);
return results;

}

/**
* Return the number of entries currently in the
* address book.
* @return The number of entries.
*/
public int getNumberOfEntries()
{

return numberOfEntries;

}

/**
* Remove the entry with the given key from the address book.
* @param key One of the keys of the entry to be removed.
*/
public void removeDetails(String key)
{

ContactDetails details = book.get(key);
book.remove(details.getName());
book.remove(details.getPhone());
numberOfEntries--;

}