Which is best practice ?

hi everybody,
I have a silly doubt, which is good
import packagename.*;or
import packagename.classname;.. and wat is the diffference other than that, "*" means it will import all the classes in the package? will specifing the classname improve the java code execution or make it more optimized?
thanks for your comments
-- Abdel Raoof Olakara
http://olakara.googlepages.com

Definitely the performance problem is there if you
import using the "*" .
at run time it Load's all the classes.nope, it doesn't. import statements have nothing to do with classloading, they exist only at a source code level. classes are loaded lazily anyway, only when something actually goes to use them
So, specify the classes using class name explicitly,
it not only increase the performance but also it is
easy to understand who review's your codethe performance increase is a fallacy - well, possibly a slightly faster compile - but I agree with the readability, definately

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In Oracle, which is best practice for 'NOT EQUAL TO'

I need to check for where a decimal value is not zero.
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2 as
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2 /
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2 for
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2 /
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| Id | Operation         | Name | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT |      |     1 |   103 |   345   (2)| 00:00:05 |
|* 1 | TABLE ACCESS FULL| T    |     1 |   103 |   345   (2)| 00:00:05 |
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PLAN_TABLE_OUTPUT
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2 for
3 select * from t where no >0 or no <0
4 /
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2 /
PLAN_TABLE_OUTPUT
Plan hash value: 4259936809
| Id | Operation                    | Name | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT             |       |     2 |   206 |     6   (0)| 00:00:01 |
|   1 | CONCATENATION               |       |       |       |            |          |
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|* 3 |    INDEX RANGE SCAN          | T_IDX |     1 |       |     2   (0)| 00:00:01 |
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