Validatons using Strings

Hi All,
Can anybody please help me out.

I have a text field i need to validate that text field with the following condtions using strings.

1. It should accept year (eg : 2006)
2. It should accept month (eg : 09/2006)
3. It should accept date (eg : 11/09/2006)
4. It should accept range (eg: 2006-2009)
5. Months (eg: 15 M)
6. years (eg: 5 y)

Can anybody please help me out.

Thanks in Advance.

What you can do is . Create a userdefined control inherited from TextField and using regular expressions you can validate the text contained in the text field.
[ December 29, 2005: Message edited by: Srinivasa Raghavan ]

Hmmm, this should be in the Swing/etc... forum, but anyway...

If you are using Swing, check out JFormattedTextField (you should be able to use it directly, without subclassing):
http://java.sun.com/developer/JDCTechTips/2004/tt0504.html
http://java.sun.com/products/jfc/tsc/articles/reftf/index.html
http://java.sun.com/j2se/1.4.2/docs/guide/swing/1.4/ftf.html

Or, you may prefer to use javax.swing.InputVerifier:
http://java.sun.com/developer/JDCTechTips/2005/tt0518.html
http://java.sun.com/developer/JDCTechTips/2001/tt1120.html
http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/InputVerifier.html