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How to get current date and time

Sharma Vinit
Greenhorn

Joined: Apr 29, 2010
Posts: 5
hi friends,

I wish to use the current year in my program but unable to figure out a way to do this.There's no direct method in the Java docs.

How can i retrieve the current month and year in my program?

Thanks
pankaj patil
Ranch Hand

Joined: Dec 19, 2004
Posts: 98
make use of Calendar class in the java.util package
or make use of Date from the java.util package

java.util.Date()

Regards,
Pankaj Patil
Pramod P Deore
Ranch Hand

Joined: Jul 15, 2008
Posts: 629

you can also use


Life is easy because we write the source code.....
Sharma Vinit
Greenhorn

Joined: Apr 29, 2010
Posts: 5
hey guys

how can i compare a date with current date. I have to check the joining date of a student which is received from front end as a string.The joining date should not be greater than today's date.

I have tried the following. Its working but i think there must be a better way out





Jesper de Jong
Java Cowboy
Saloon Keeper

Joined: Aug 16, 2005
Posts: 14432
    
  23

Please UseCodeTags when you post source code.

That looks a lot more complicated than it needs to be...

You can use class java.text.SimpleDateFormat to parse a string into a Date object. Then you can use the methods after() or before() of class Date to check if the date is before or after another date.

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pankaj patil
Ranch Hand

Joined: Dec 19, 2004
Posts: 98
Look for Date comparison code in java

visit below mention link
http://www.roseindia.net/java/example/java/util/CompareDate.shtml
Pradeep Katipamula
Ranch Hand

Joined: May 11, 2010
Posts: 37
Sharma Vinit wrote:
I have tried the following. Its working but i think there must be a better way out


Here's the code.



Hope this is wat you wanted. I;ve returned a boolean, if you really need to send a string please modify.

Pradeep
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 40052
    
  28
That doesn't look good. You are either returning true or throwing a checked Exception.
Rob Spoor
Sheriff

Joined: Oct 27, 2005
Posts: 19784
    
  20

DateFormat.parse(String, ParsePosition) returns null when the string is invalid. That can be used:
Not only does this code not throw an exception, it also doesn't create an unnecessary Calendar (and Date from getTime()) object. You can improve this code slightly by checking if the entire String is used in parsing:
If the parse position's index is not directly at the end of the String there is something else in the String as well. This will occur if the passed String is something like "20/05/2010abc". The added check will make the method return false if that's the case.


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