Thread: Searching and printing string results from an Arraylist. Having difficulty.

Hi, been having trouble with the last two methods of an assignment.

Basically I need to search an arraylist for a string that matches for example, 'waterford' and print to screen each of these results.

Also we need to print to screen an address, based on a name being entered.

What would be the best way to implement this, and would HashMap or HashSet be better?
We've been thinking along the lines of this

 
public void searchByCounty()
        {
            int index =0;
            boolean found = false;
            while(index < addressLine.size() && !found)
                {
                    String county = nam.get(index);
                    if(Address.contains(searchString))
                        {
                            found = true;
                        }
                    else
                        {
                            index++;
                        }
                }
            }

If you do not need multiple entries or proper ordering, a HashSet would work. Although the Hashset is founded upon a HashMap, if you don't need key/value pairs you can easily go with HashSet. If you want to link up locations with multiple hashsets (such as key a HashMap with street -> city, and city->county, and count->country, etc...), HashMap would work well. One more note, if you place custom written objects in the Map or Set you need to override and implement the hashCode() and equals() methods.