How do I create a hash map?

If I have:

String server             = RequestParser.getString(request,"server", "nfsu2");
String platform       = RequestParser.getString(request,"platform", getPlatform());
String playername      = RequestParser.getString(request,"playername", "");
String error             = RequestParser.getString(request,"error", "unknown");

which gets the request.parameter of server, platform etc.

I want to store these in a hash map and then pull out the error value in the page and compare it to a string. How do I do this?
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just use
HashMap map = new HashMap();
dataMap.put(server, server);
dataMap.put(platform      , platform      );
dataMap.put(playername     , playername     );
dataMap.put(error           , error           );



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