Date/Calender Help

Guys familiar with the Date and Calender classes...
After I get the current date, how can I move back exactly one week?
I'm not sure because different months have different amounts of days, etc.
For example if it is June 4th, one week earlier would be May 28th.
How can I do this in java? It's easy if you are in the middle of the month, you can just subtract 7, but if you are within the first 7 days of the month, going back a week will put you somewhere in the previous month. Is there a method to get the number of days in a month? Any suggestions?

This is an FAQ, which receives yawmark's stock response (nothing personal :-). The answer is not the second page of the first article. Calendar takes care of that for you.
[url http://www.javaworld.com/jw-12-2000/jw-1229-dates.html]Calculating Java dates: Take the time to learn how to create and use dates
[url http://www.javaalmanac.com/egs/java.util/CompDates.html]Comparing Dates
[url http://www.javaalmanac.com/egs/java.text/FormatDate.html]Formatting a Date Using a Custom Format
[url http://www.javaalmanac.com/egs/java.text/ParseDate.html]Parsing a Date Using a Custom Format

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