Sorting a Hashtable based on object properties

[Deevis]

I have a Hashtable of server objects...
the key for each entry is the IP address...
the value for each entry is a server object with 3 properties
1) ping (int) - your ping to the server
2) lastVisit (long)- the last time you visited the server ( taken from System.currentTimeMillis()
3) numberVisits (int) - the number of times you've visited the server
Here's the thing - I need to sort the Hashtable in all 3 of the ways above, depending on user selection...
What is the easiest way to do this?

[Cindy Glass]

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Thanks,
Cindy