Problem in understanding literals

Hi
Im learning Java for about a week now and I still dont know what literals are used for. But i have a suggestion:
They are used if a method expects a certain simple variable type (e.g. float) and you want to give the number 10 to it. And now you need the literal because otherwise the method would interpret 10 as an integet and cause an error right?!
So you could give 10f as a literal to the method or write 10.0 right?!
If not please or if there are other (maybe more important) usages of literals please tell me...
thx
Xadian

I think you are missing the definition of a "literal". A literal is a sequence of characters which are interpreted by the compiler to mean what they say. All numbers are literals.
Some examples:
12 is an int literal, if it appears in your code, it really means 12. It is not a placeholder for another value nor can it be.
12f is a float literal, though it still means 12, it can be used in methods which expect a float (rather than an int).
12d and 12.0 are both double literals that mean 12.
"12" is a String literal, and it means (and always will mean) a String containing the characters '1' and '2' (those are char literals).
In the expression:
Integer myInt = new Integer(4);
the 4 is an int literal.
It would be very difficult (bordering on impossible) to right a useful program without using literals.

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Hi,
i have a little problem to understand how the OLE API works...
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1. Load a Document (No view)
2. Findo out the page size
3. Close the document
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$OLE$AcroExch.Document.11
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What is the right way for that?
The API reference is not a help for me on this point...
Best Regards
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What is wrong?
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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using System.Windows.Data;
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Problems to understand

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Tell them they need an acrobat.com account. but my experience: this service from adobe is to confuse. nobody understand.
they go oin the website and are confused, dont understand what this do, why they need ist - and the communication on the site is not really helful.
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Here is an easy? Problem?
What is wrong?
The problem is: "Acrobat.AcroAVDocClass..."
I will only open a PDF File in C#...
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
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using System.Windows.Media.Imaging;
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Just some help understanding literals

I read the tutorials, and I still don't really get what literals actually are ?
And also, what is the significance of '.class' ? Because I also couldn't understand this :
Finally, there's also a special kind of literal called a class literal, formed by taking a type name and appending ".class"; for example, String.class. This refers to the object (of type Class) that represents the type itself.

JoachimSauer wrote:
_ELBEE_ wrote:
So the +.class+ suffix can be added to any class name to inspect that class.
Basically yes. A different way to get the Class object for a given class is to call Class.forName() with the class name as a String (literal) as the parameter.Or call getClass() on a particular instance. It all depends on the exact scenario in which you're trying to get a class object
int i1 = 42;
int i2 = Integer.parseInt("42");
Integer i3 = Integer.valueOf(i1);
Class c1 = java.lang.Integer.class; // I knew the classname when I wrote the code
Class c2 = Class.forName("java.lang.Integer"); // I didn't know the classname when I wrote the code
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Problems with string literals in ejb-ql's

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com/sun/ejb/ejbql/StringLiteral
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EJB QL method : public abstract com.mongoosetech.reputation.ejb_entity.AssignedStatus com.mongoosetech.reputation.ejb_enti
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at com.sun.ejb.ejbql.EjbQLDriver.parse(EjbQLDriver.java:86)
at com.sun.ejb.sqlgen.SQLGenerator.generateSQLForEjbQLQueries(SQLGenerator.java:628)
at com.sun.ejb.sqlgen.SQLGenerator.generateSQL(SQLGenerator.java:270)
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at com.evermind.server.ejb.EJBPackageDeployment.getPackage(EJBPackageDeployment.java:645)
at com.evermind.server.ejb.EJBContainer.postInit(EJBContainer.java:513)
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at com.evermind.server.Application.setConfig(Application.java:136)
at com.evermind.server.ApplicationServer.addApplication(ApplicationServer.java:1479)
at com.evermind.server.ApplicationServer.initializeApplications(ApplicationServer.java:1436)
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at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:49)
Error in application ACME Portal: Error loading package at file:/C:/dev/staging/portalstudio/ee/image/deploy/portal/portal-ej
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ty.AssignedStatusHome.findByRecipientIDAndStatusIDNotRevoked(java.lang.String,java.lang.String) throws javax.ejb.FinderExcept
ion,java.rmi.RemoteException
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Kevin,
We are aware of this bug in the developer's preview and will be fixed when next version of OC4J 9.0.3 will be released.
regards
Debu Panda
Oracle

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this particular code is replcement for 'translate code page syntax'
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i cannot understand the   'buffer' field in this code
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conv = cl_abap_conv_in_ce=>create(
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data:
buffer1 type xstring,
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int type i.
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package com.server;
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regards,
Ashish

I guess there are no replies to my problem because the problem statement is very complex. If so pls let me know and I'll re-phrase it but I need to know the right way of creating web services on Axis.

Regular Expression, problem when the literals have content "I_"

Hi,
I guess this seems to be an Oracle bug/defect. If I am doing it wrongly, please let me know.
I need to remove the "_VERSION" which comes at the last of a string column. For e.g, If the string is WINDOWS_XP_VERSION, then the output should be WINDOWS_XP.
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Folks,
Thanks for all your helps.
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Sharmin

Find problems in understanding a tutorial relating to IDOC

Please check the link
http://idocs.de/www5/books/IDocBook/cook_A5.pdf
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Please check the link
http://idocs.de/www5/books/IDocBook/cook_A5.pdf
In page no: 32 (Topic: 8.5 Assigning a processing function ) ,FM is assigned directly to Message type and Idoc type combination.
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hello all please find query as below :
/* program to alter the ordering of the elements in the collection class TREESET
class Demo1 overrides compare() of Comparator interface
which returns the int value.
when 'return b1.compareTo(a1);' is used then the program output is as
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i.e., names are displayed in ascending order
when 'return a1.compareTo(b1);' is used then the program output is as
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i.e., names are displayed in descending order
How these change of ordering occurs ?
import java.util.*;
class Demo1 implements Comparator
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Per the java docs:
public interface Comparable
This interface imposes a total ordering on the objects of each class that implements it. This ordering is referred to as the class's natural ordering, and the class's compareTo method is referred to as its natural comparison method.
Lists (and arrays) of objects that implement this interface can be sorted automatically by Collections.sort (and Arrays.sort). Objects that implement this interface can be used as keys in a sorted map or elements in a sorted set, without the need to specify a comparator.
A class's natural ordering is said to be consistent with equals if and only if (e1.compareTo((Object)e2)==0) has the same boolean value as e1.equals((Object)e2) for every e1 and e2 of class C.
It is strongly recommended (though not required) that natural orderings be consistent with equals. This is so because sorted sets (and sorted maps) without explicit comparators behave "strangely" when they are used with elements (or keys) whose natural ordering is inconsistent with equals. In particular, such a sorted set (or sorted map) violates the general contract for set (or map), which is defined in terms of the equals operation.
For example, if one adds two keys a and b such that (a.equals((Object)b) && a.compareTo((Object)b) != 0) to a sorted set that does not use an explicit comparator, the second add operation returns false (and the size of the sorted set does not increase) because a and b are equivalent from the sorted set's perspective.
Virtually all Java core classes that implement comparable have natural orderings that are consistent with equals. One exception is java.math.BigDecimal, whose natural ordering equates BigDecimals with equal values and different precisions (such as 4.0 and 4.00).
For the mathematically inclined, the relation that defines the natural ordering on a given class C is:
{(x, y) such that x.compareTo((Object)y) <= 0}.
The quotient for this total order is:
{(x, y) such that x.compareTo((Object)y) == 0}.
It follows immediately from the contract for compareTo that the quotient is an equivalence relation on C, and that the natural ordering is a total order on C. When we say that a class's natural ordering is consistent with equals, we mean that the quotient for the natural ordering is the equivalence relation defined by the class's equals(Object) method:
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Hi,
I am little bit confused abt. eventdispatchthread.
when i tried to update component status during some process i tried for following pattern.
Runnable send = new Runnable() {
public void run() {
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SwingUtilities.invokeLater(send);
i get not accurate result, now i think by this way i tried to put my process in eventdispatchthread and if process is long than it will not update component status.
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Waiting fo reply.....

The idea is to use SwingUtilities.invokeLater() inside the processing code of the new thread. Maybe the example from reply 5 of this thread will help explain it:
http://forum.java.sun.com/thread.jsp?forum=57&thread=420676
Check out this section from the Swing tutorial on "Threads":
http://java.sun.com/docs/books/tutorial/uiswing/mini/threads.html

Cannot understand the problem

Hi frnds my name is raj , i am very new to OBIEE , i have been pracitcing it on my own and now i had few problems in understanding the errors .
I built a physical layer with CHANNELS ,COSTS , COUNTRIES , PRODUCTS , SALES ,TIMES tables and SALES being the fact table ,,, I have physical joined every column except COST to sales .
And in Bussiness layer i have created a new bussiness model and dragged all the tables from physical layer except COST table..
In BMM layer , in Sales Table i have dragged a column named UNIT_COST from cost table in physcial layer and renamed it to unitcost , so the sales table in BMM layer has two sources i.e., SALES and COSTS .
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ODBC DRIVER RETURNED AN ERROR(SQLEXECDirectVV)
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Hi,
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BI Learner

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Hi everybody, I'm having problems in understanding how to authorize my program to perform privileged tasks.
I read the apple documentation and wrote this piece of code:
AuthorizationRef auth;
OSStatus os;
AuthorizationRights rights;
AuthorizationItem item;
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item.valueLength = 0;
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etresoft wrote:
No. I mean you should study that documentation and figure out exactly what you want to do and the best way to go about it. You don't want to mess around with root access unless you know precisely what you are doing. I have seen programs that abused that privilege and caused me to have to reinstall unrelated 3rd party software that was inadvertently altered by an installer.
I've read that documentation 6 or 7 times, but it does explain only the concepts behind authorization (the Security Server, authentication without rights, naming the rights, credential cache and so on) while it's not such clear talking about code. What I need now is understand how it works. I've downloaded all the related sample code but I've found it filled with glue code, so that I didn't managed to understand what it really does. I'd prefer a bare code that actually does nothing useful rather than complete programs that does many things but don't let me understand the essentials.
Besides, what I'm trying to do is exactly to figure out the best way to solve my problem, but how can I choose the best way if I do not get where this way leads me to? I thought it was clear that my intention was not to acquire root privileges or to use AuthorizationExecuteWithPrivileges just to print a couple of strings or to execute an helloworld. I think it's obvious that root privileges should be used only if there's no other way, but I just want to understand how it works. It think it's absurd that, in order to understand that, I have to open low numbered ports!
Documentation says +The Security Server creates the file, opens it for reading and writing, and connects it to the tool’s standard input and output+. All right then, let's try. I executed ls and, reading the file, I found the output. Wonderful! Let's try with a custom program. Blank. So there's something I do not get. What? Mystery. I ask and the answer is "study the documentation".
I have never used a communication pipe when using AuthorizationExecuteWithPrivileges. I have never even released a program using AuthorizationExecuteWithPrivileges.
So maybe it would be easier to say "I don't know".
The best solution is not to use that function. The 2nd best solution is not to try to communicate with the tool you are executing. The third best solution is to study the documentation and example programs in order to learn how to do it correctly.
Probably you're right, probably the best solution is not to use that function. Probably it worths the effort to understand why. Even if the only result is that I'll be able to say "hey, that guy on the forum was right, let's find another way".
Well, except this, I have to thank you, your help has been useful this far.

The Hideous Lack of Help I received trying to resolve Creative Suite Problems

Rarely, in the many years I've been a techie have I been as outraged and disgusted with a vendor as I am today with Adobe. I've been a loyal customer for decades. I had a simple problem - repair my software license problem. My laptop malfunctioned and was replaced, I cloned my hard drive to the new machine. Trying to run CS3 software produced a "product license no longer works" message. I understood, the software didn't recognize the new machine. But, I have the original software, the original serial numbers, etc. It should be an easy problem to fix - call tech service get them to direct me to the file/s I need to delete, get the serial number and I'd be back in business. Sure! I might as well have speculated that I would have been successful french kissing a King Cobra where success means I'd still be alive after the passion.
This process has been and still is a nightmare. Firstly, I had to endure profound incompetence dealing with English speaking people who didn't understand English and for whom I had to provide a passport number! No, not just the plain definition of words was a problem, but understanding concepts. Then, I drowned in the murky waters of neophytes who read responses from a cheat sheet recommendations for solutions page that were not for the problem I had. Well, I have a trick. Instead of fighting with challenged workers, just call back surely you'll get another tech service person more adept. I asked for someone from North America presuming that communication would then not be a problem. Customer Service agreed to send me to such a tech service person. When the phone was answered, however, I realized that once again I'd traveled 9,000 miles. Ok, make the best of it I thought. All I need is to get my software working. I've got projects to complete. By now, its 4 PM in the afternoon - booh, I'll have to work all night. The new tech service person gave me a web address follow these eight steps and your problem will be solved. Clearly, even through no webcam was running the Tech Service person saw emblazoned on my forehead the word "FOOL" I admit it, I AM A FOOL! I actually thought that following the 8 steps would work.
I methodically tried every step - deleted files, ran repair permissions, and on and on. Nothing worked! So, resigned that a complete uninstall and reinstall was my only recourse (Step 8) I did so. By now, its midnight (It didn't take me this long to back up from the Time Machine my entire computer) I was half way through the reinstall. 1:15 AM the install is complete. Surely, my problem is solved right? NO FOOL!! Restart the computer if you must but alas, The SAME DUMB MESSAGE after all this work! I cannot remember the last time profane language was seemed so appropriate a tool for expression! The sad part, I know in my gut there is probably some hidden file that needs to be deleted so I can get back to work.
In any event, is there anyone who can connect me with expertise personified? All I want is for my "I PAID FOR IT DIRECTLY FROM ADOBE" software to work. I hope someone from ADOBE, assigned to monitor this forum, will read this tome with a heart of compassion. PLEASE

Does this apply?
http://kb2.adobe.com/cps/834/cpsid_83499.html
Bob

Issue in understanding report va05

Dear gurus
Im facing problem in understanding report va05
Order Item   Po Number    size      ordqty   ordqty      remaining          confirm qty
1400009128     40     LHR1-01024     508 mm     2,000     0     2,000.000     1,598.990
1400009128     40     LHR1-01024     508 mm     2,000     0     2,000.000     401.010
1400009128     40     LHR1-01024     508 mm     2,000     2,000     2,000.000     0
This is the output of my report .
here the SD document has been delivered partially then remaining quantity should be less then 2000 then why the report is showing 2000 in remaining quantity field.
Regards
Saad.

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