question in core java

mrk_karupothu · December 7th, 2005, 07:04 AM

how to create a file for constant variables in java and how to use those constants in other files

ishino · December 21st, 2005, 07:31 AM

Usually this is done by creating an interface providing the constant values, which then can be implemented by any class that wants to use the fields.

Example:

Code:

public interface MyConstants{
 public final String CONST = "CONST";
}

public class UsingTheConstants implements MyConstants{
...
}

adarsh83 · December 23rd, 2005, 11:08 AM

You don't have to implement that interface.

all attributes declared within an interface are
implicitely public static and final. So, you can
directly use them as MyConstants.CONST and so on.

________
Adarsh

ski · September 7th, 2007, 10:07 AM

Hi,
If you define variables in an interface, then those will be
constants by default, and these values cann't be changed.

For more questions and answers, I found a good link

http://www.freewebs.com/java-j2ee-questions-answers/

Thanks.