Using a Comparable Class with Treeset, creating counter in comparable clas

http://rafb.net/paste/results/jibQzk63.html - comparable http://rafb.net/paste/results/Noahue63.html - loading
http://rafb.net/paste/results/re1Swn60.html - contents of .txt file * sorry the paste is weird lol.
Trying to List word count in alphabetical order - Already did that
Having a counter so it counts the number of time that specfic word appeared in the txt file - This is my problem I don't know where to add the counter in my comparable class so it stores a number and adds everytime that same word appears. ex. "and 7" the word "and" appeared 7 times in the .txt file
so if some1 could help me, would be apperciated. I've like tried everything and getting the opposite results.

That's just the issue I'm having. My sample code functions as long as the parameterized type being compared isn't Comparable. For example, changing the type to A<Integer,String> works fine.
I think I may have discovered why this is the case. By declaring A<Comparable,String>, I am implying that the first parameterized type (call it T) is Comparable<T>. As a result, what I need is an A<Comparable<Comparable>, String>; that is, anything which is comparable must be able to be compared to the object. Since Integer is only Comparable<Integer>, it cannot be compared to all Comparable objects and therefore doesn't meet the requirements.
I'm not used to looking the other way on the inheritance tree. :)
The original trouble I had with this came from when I was passing a hash code generator into a piece of source and I needed to compare the hashes. The only guarantee I have regarding the hashes is that they are Comparable and I was putting them in a similar Pair structure. I then wanted to build a comparator to compare them but, since they're Comparable<?>, I can't know to what they can be compared... so I'll have to change the contract on the code. ;)
Thanks. Cheers. :)

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C_Zhao wrote:
I ran into a little problem with the portability of Java (ironic eh?) across computers.Not as ironic as you might think.
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Why can we only use 1 release class for overall Release of Purchase Req?

Hi,
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BR Jakob F. Skott

You can give feed back to Apple from the iTunes drop-down menu in the iTunes menu bar..
You can also contact the iTS Customer Service from the links on this page - http://www.apple.com/support/itunes/store/
MJ

What is '&' used in message class

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Hi
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Comparing a class with Class-Object

Hi there:
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Error while creating vendor bank details using MAINTAIN_BAPI of class VMD_ei_api

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Hi Abhijeet,
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Address Checks - Business Address Services (BC-SRV-ADR) - SAP Library

Re: How do you create and use "common" type classes?

Hi,
You have 2 potential solutions in your case :
1- Sub-class TextNullable class of Framework and add your methods in the
sub-class.
This is the way Domain class work. Only Nullable classes are sub-classable.
This is usefull for Data Dictionary.
The code will be located in any partition that uses or references the supplier
plan.
2- Put your add on code on a specific class and instanciate it in your user
classes (client or server).
You could also use interface for a better conception if needed. The code will
also be in any partition that uses or references the supplier plan where your
add on class is located.
If you don't want that code to be on each partition, you could use libraries :
configure as library the utility plan where is your add-on class.
You can find an example of the second case (using a QuickSort class,
GenericArray add-on) with the "QuickSort & List" sample on my personal site
http://perso.club-internet.fr/dnguyen/
Hope this helps,
Daniel Nguyen
Freelance Forte Consultant
http://perso.club-internet.fr/dnguyen/
Robinson, Richard a écrit:
I'm relatively new to forte and I'd like to know how can you handle utility
type classes that you want to use through out your application? Ideally
what I want is a static class with static methods.
Let's say that I have a StringUtil class that has a bunch of methods for
manipulating strings.
My problem is that we have code that runs on the client and code that runs
on the server. Both areas could use the StringUtil class, but from what I
understand, I have to create StringUtil in a plan and then create a server
object of type StringUtil. The server object will eventually get assigned
to a partition. That's not good since I really want the server object to
physically reside at the server end and at the client end. (Actually, I
don't want a server object, I just want to invoke a static method of a
static class).
Any clues on how to solve this problem would be appreciated.
Also, what is the url at Sage-it that has a summary of all emails that have
been posted to [email protected]? Perhaps this question has been
answered previously.
Thanks in advance
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
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To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
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Hi Richard,
Your question about "utility classes" brings up a number of issues, all of
which are important to long-term success with Forte.
There is no such thing as a static method (method that is associated with a
class but without an implicit object reference - this/self/me "pointer") in
TOOL, nor is there such thing as a global method (method not associated
with a class at all). This is in contrast to C++, which has both, and
Java, which has static methods, but not global classes. Frequently, Forte
developers will write code like this:
result, num : double;
// get initial value for num....
tmpDoubleData : DoubleData = new;
tmpDoubleData.DoubleValue = num;
result = tmpDoubleData.Sqrt().DoubleValue;
tmpDoubleData = NIL; // send a hint to the garbage collector
in places where a C++ programmer would write:
double result, num;
// get initial value for num....
result = Math::Sqrt(num);
or a Java programmer would write:
double result, num;
// get initial value for num....
result = Math.sqrt(num);
The result of this is that you end up allocating an extra object now and
then. In practice, this is not a big deal memory-wise. If you have a
server that is getting a lot of hits, or if you are doing some intense
processing, then you could pre-allocate and reuse the data object. Note
that optimization has its own issues, so you should start by allocating
only when you need the object.
If you are looking for a StringUtil class, then you will want to use an
instance of TextData or TextNullable. If you are looking to add methods,
you could subclass from TextNullable, and add methods. Note that you will
still have to instantiate an object and call methods on that object.
The next issue you raise is where the object resides. As long as you do
not have an anchored object, you will always have a copy of an object on a
partition. If you do not pass the object in a call to another partition,
the object never leaves. If you pass the object to another partition, then
the other partition will have its own copy of the object. This means that
the client and the server will have their own copies, which is the effect
you are looking for.
Some developers new to Forte will try to get around the lack of global
methods in TOOL by creating a user-visible service object and then calling
methods on it. If you have a general utility, like string handling, this
is a bad idea, since a service object can reside only on a single
partition.
Summary:
* You may find everything you want in TextData.
* Unless you anchor the object, the instance will reside where you
intuitively expect it.
* To patch over the lack of static methods in TOOL, simply allocate an
instance when required.
Feel free to email me if you have more questions on this.
At the bottom of each message that goes through the mailing list server,
the address for the list archive is printed:
http://pinehurst.sageit.com/listarchive/.
Good Luck,
CSB
-----Original Message-----
From: Robinson, Richard
Sent: Tuesday, March 02, 1999 5:44 PM
To: '[email protected]'
Subject: How do you create and use "common" type classes?
I'm relatively new to forte and I'd like to know how can you handle utility
type classes that you want to use through out your application? Ideally
what I want is a static class with static methods.
Let's say that I have a StringUtil class that has a bunch of methods for
manipulating strings.
My problem is that we have code that runs on the client and code that runs
on the server. Both areas could use the StringUtil class, but from what I
understand, I have to create StringUtil in a plan and then create a server
object of type StringUtil. The server object will eventually get assigned
to a partition. That's not good since I really want the server object to
physically reside at the server end and at the client end. (Actually, I
don't want a server object, I just want to invoke a static method of a
static class).
Any clues on how to solve this problem would be appreciated.
Also, what is the url at Sage-it that has a summary of all emails that have
been posted to [email protected]? Perhaps this question has been
answered previously.
Thanks in advance

Using analytical function - value with highest count

Hi
i have this table below
CREATE TABLE table1
( cust_name VARCHAR2 (10)
, txn_id NUMBER
, txn_date DATE
, country VARCHAR2 (10)
, flag number
, CONSTRAINT key1 UNIQUE (cust_name, txn_id)
INSERT INTO table1 (cust_name, txn_id, txn_date,country,flag) VALUES ('Peter', 9870,TO_DATE ('15-Jan-2011', 'DD-Mon-YYYY'), 'Iran', 1);
INSERT INTO table1 (cust_name, txn_id, txn_date,country,flag) VALUES ('Peter', 9871,TO_DATE ('16-Jan-2011', 'DD-Mon-YYYY'), 'China', 1);
INSERT INTO table1 (cust_name, txn_id, txn_date,country,flag) VALUES ('Peter', 9872,TO_DATE ('17-Jan-2011', 'DD-Mon-YYYY'), 'China', 1);
INSERT INTO table1 (cust_name, txn_id, txn_date,country,flag) VALUES ('Peter', 9873,TO_DATE ('18-Jan-2011', 'DD-Mon-YYYY'), 'Japan', 1);
INSERT INTO table1 (cust_name, txn_id, txn_date,country,flag) VALUES ('Peter', 9874,TO_DATE ('19-Jan-2011', 'DD-Mon-YYYY'), 'Japan', 1);
INSERT INTO table1 (cust_name, txn_id, txn_date,country,flag) VALUES ('Peter', 9875,TO_DATE ('20-Jan-2011', 'DD-Mon-YYYY'), 'Russia', 1);
INSERT INTO table1 (cust_name, txn_id, txn_date,country,flag) VALUES ('Peter', 9877,TO_DATE ('22-Jan-2011', 'DD-Mon-YYYY'), 'China', 0);
INSERT INTO table1 (cust_name, txn_id, txn_date,country,flag) VALUES ('Peter', 9878,TO_DATE ('26-Jan-2011', 'DD-Mon-YYYY'), 'Korea', 0);
INSERT INTO table1 (cust_name, txn_id, txn_date,country,flag) VALUES ('Peter', 9811,TO_DATE ('17-Jan-2011', 'DD-Mon-YYYY'), 'China', 0);
INSERT INTO table1 (cust_name, txn_id, txn_date,country,flag) VALUES ('Peter', 9854,TO_DATE ('13-Jan-2011', 'DD-Mon-YYYY'), 'Taiwan', 0);
The requirement is to create an additional column in the resultset with country name where the customer has done the maximum number of transactions
(with transaction flag 1). In case we have two or more countries tied with the same count, then we need to select the country (among the tied ones)
where the customer has done the last transaction (with transaction flag 1)
e.g. The count is 2 for both 'China' and 'Japan' for transaction flag 1 ,and the latest transaction is for 'Japan'. So the new column should contain 'Japan'
CUST_NAME TXN_ID TXN_DATE COUNTRY FLAG country_1
Peter 9811 17-JAN-11 China 0 Japan
Peter 9854 13-JAN-11 Taiwan 0 Japan
Peter 9870 15-JAN-11 Iran 1 Japan
Peter 9871 16-JAN-11 China 1 Japan
Peter 9872 17-JAN-11 China 1 Japan
Peter 9873 18-JAN-11 Japan 1 Japan
Peter 9874 19-JAN-11 Japan 1 Japan
Peter 9875 20-JAN-11 Russia 1 Japan
Peter 9877 22-JAN-11 China 0 Japan
Peter 9878 26-JAN-11 Korea 0 Japan
Please let me know how to accomplish this using analytical functions
Thanks
-Learnsequel

Does this work (not spent much time checking it)?
WITH ana AS (
SELECT cust_name, txn_id, txn_date, country, flag,
        Sum (flag)
            OVER (PARTITION BY cust_name, country)      n_trx,
        Max (CASE WHEN flag = 1 THEN txn_date END)
            OVER (PARTITION BY cust_name, country)      l_trx
FROM cnt_trx
SELECT cust_name, txn_id, txn_date, country, flag,
        First_Value (country) OVER (PARTITION BY cust_name ORDER BY n_trx DESC, l_trx DESC) top_cnt
FROM ana
CUST_NAME      TXN_ID TXN_DATE COUNTRY          FLAG TOP_CNT
Fred             9875 20-JAN-11 Russia              1 Russia
Fred             9874 19-JAN-11 Japan               1 Russia
Peter            9873 18-JAN-11 Japan               1 Japan
Peter            9874 19-JAN-11 Japan               1 Japan
Peter            9872 17-JAN-11 China               1 Japan
Peter            9871 16-JAN-11 China               1 Japan
Peter            9811 17-JAN-11 China               0 Japan
Peter            9877 22-JAN-11 China               0 Japan
Peter            9875 20-JAN-11 Russia              1 Japan
Peter            9870 15-JAN-11 Iran                1 Japan
Peter            9878 26-JAN-11 Korea               0 Japan
Peter            9854 13-JAN-11 Taiwan              0 Japan
12 rows selected.

Did the Java Writers Get a Little Happy with Memory Use in String class?

I mean that question half jokingly.
Taking a look at the String class code, I saw the following (below).
Why is there an int for offset and an int for count?
String is immutable, why not just return value.length for the count?
And what is the offset for?
Thanks!
public final class String
    implements java.io.Serializable, Comparable<String>, CharSequence
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    private final char value[];
    /** The offset is the first index of the storage that is used. */
    private final int offset;
    /** The count is the number of characters in the String. */
    private final int count;
    /** Cache the hash code for the string */
    private int hash; // Default to 0PS: a second look kinda verifies it too.
in the constructor ,count is even defined as value.length.
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     int size = value.length;
     this.offset = 0;
     this.count = size;
     this.value = Arrays.copyOf(value, size);
    }

You don't get the choice. The arrays are shared
whenever you do substring.Yea, thats my point. I think most Strings are unique.
Id be very surprised if even 2% of all String use was
a result of a substring.The wrapper classes use it for parsing.
File uses it for getName and getParent.
String uses it for trim.
Class uses it for resolving names.
Regex uses it.
etc. ...
Now, I don't know what percentage of usage all that amounts to, but it IS heavily used.
So your desire to gain the 2 bytes back would cost enough byte every time substring is used that it might end up costing far more than the 8 bytes you save.

Problem to use SAPServer Class with load balancing

Hello,
We use the SAPServer Class from SAP .Net Connector 1.0.
On our system, we want to start the RFC Server to use the logon group.
I didn't find how to use ServerMessage and LogonGroup with one of constructors.
When we start the SAPServer with the command line -aUSER -gBEAUSR201 -xsapgw10 from the DB server (BEAUSR201) it's Ok,
but when we start from one of our application Server (for example -aUSER -gBEAUSR213 -xsapgw13 ) it's KO
we have this message on the trc file.
ERROR file opened at 20041125 084739 Paris, Madrid, SAP-REL 620,0,1622 RFC-VER 3 683864 MT-SL
T:13188 ======> Connect to SAP gateway failed
Connect_PM TPNAME=USER, GWHOST=BEAUSR214, GWSERV=3314
LOCATION    CPIC (TCP/IP) on local host
ERROR       hostname 'BEAUSR214' unknown
TIME        Thu Nov 25 08:47:39 2004
RELEASE     620
COMPONENT   NI (network interface)
VERSION     36
RC          -2
MODULE      ninti.c
LINE        385
DETAIL      NiPHostToAddr
SYSTEM CALL gethostbyname
COUNTER     1
What is the solution ?
Thanks

Hi,
The message server and Logon group are there for balancing the load among application servers within a SAP system. You are using the SAPServer class to implement an external RFC server that usually serves the request from SAP servers. So using message server and logon group with an external server doesn't make sense.
I understand that both your DB server and the application server in question are Windows machine with .NET runtime installed and you started the SAPServer programs directly from Windows command line. If so, the error message for the KO case says that the hostname BEAUSR214 could not be resolved from the application server. I also noticed that the hostname BEAUSR214 in error message doesn't match the hostname BEAUSR213 given in command line.
Can you ping BEAUSR213 or BEAUSR214 from the application server in concern?
Regards,
Guangwei Li

How to use class.getResource() to create an ImageIcon

Hi,
I am well acquainted with creating and using ImageIcon icons using the ImageIcon constructor
and putting the image file in a folder called Images which is at the same level as the
bin and src folders.
I discovered a demo program, LayeredPaneDemo, that uses class.getResource() to create
an icon and found that in my eclipse version, the icon's image file was not found when
I used the original getResource() call but the icon was created when I used the ImageIcon
constructor.
I posted on JavaRanch and eventually realized that the image file needed to be with the
.class files, so I moved the Images folder under bin and getResource() works fine and I'm
happy.
However, I have three questions for you.
One poster on JavaRanch told me that it's better to use getResource() rather than the
ImageIcon constructor for distributing an app (I'm not distributing anything but want
to do it all correctly).
Do you agree with that or can I safe keep using the ImageIcon constructor?
Another poster told me he doesn't think it's safe to leave the image file in bin because
it might be lost during the build in eclipse and that there is a way to have eclipse copy
the files to bin during the build which should mean that I can leave the images folder at
the level of bin and src.
Do you agree with that?
If yes, how do I get eclipse to copy the file during the build?
P.S.
Before I posted on JavaRanch, I put the Images folder at every level of the project's
directory as shown in eclipse (which is why I missed the bin folder until JavaRanch
whacked me upside the head) and getResource() still didn't work.

The contents of the Java Source folder are compiled if they're source files, copied otherwise (assuming no filter's been put in place to prevent copying), so your images belong under a source folder.

Unusual use of interface defining static factory class with getInstance

This question is prompted by a recent New to Java forum question ask about the differences between Interfaces and Abstract classes. Of course one of the standard things mentioned is that interfaces cannot actually implement a method.
One of my past clients, one of the 500 group, uses interfaces as class factories. The interface defines a pubic static class with a public static method, getInstance, that is called to generate instances of a class that implements the interface.
This architecture was very object-oriented, made good use of polymorphism and worked very well. But I haven't seen this architecture used anywhere else and it seemed a little convoluted.
Here is a 'pseudo' version of the basic interface template and use
-- interface that defines public static factory class and getInstance method
public interface abc {
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        public static abc getInstance ()
            return (abc) FactoryGenerator(new abcImpl(), abc.class);
-- call of interface factory to create an instance
abc myABC = abc.Factory.getInstance();1. Each main functional area ('abc' in the above) has its own interface factory
2. Each main functional area has its own implementation class for that interface
3. There is one generator (FactoryGenerator) that uses the interface class ('abc.class') to determine which implementation class to instantiate and return. The generator class can be configured at startup to control the actual class to return for any given interface.
I should mention that the people that designed this entire architecture were not novices. They wrote some very sophisticated multi-threaded code that rarely had problems, was high performance and was easy to extend to add new functionality (interfaces and implementing classes) - pretty much plug-n-play with few, if any, side-effects that affected existing modules.
Is this a best-practices method of designing factory classes and methods? Please provide any comments about the use of an architecture like this.

Thanks for the feedback.
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I don't see how 'the generator class can be configured at startup to control the actual class to return for any given interface' can possibly be true given this pseudo-code.
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I can see why that isn't clear just from what is posted.
The way it was explained to me at the time is that the interface uses standard naming conventions and acts like a template to make it easy to clone for new modules: just change 'abc' to 'def' in three places and write a new 'defImpl' class that extends the interface and the new interface and class can just 'plug in' to the framework.
The new 'defImpl' class established the baseline functionality that must be supported. This line
return (abc) FactoryGenerator(new abcImpl(), abc.class);uses the initial version of the new class that was defined, 'abcImpl()', when calling the FactoryGenerator and it acted as a 'minimum version supported'. The generator class could use configuration information, if provided, to provide a newer class version that would extend this default class. Their reasoning was that this allowed the framework to use multiple versions of the class as needed when bugs got fixed or new functionality was introduced.
So the initial objects would be an interface 'abc' and a class 'abcImpl'. Then the next version (bug fixes or enhancements) would be introduced by creating a new class, perhaps 'abcImpl_version2'. A configuration parameter could be passed giving 'abcImpl' as the base class to expect in the FactoryGenerator call and the generator would actually create an instance of 'abcImpl_version2' or any other class that extended 'abcImpl'.
It certainly go the job done. You could use multiple versions of the class for different environments as you worked new functionality from DEV, TEST, QA and PRODUCTION environments without changing the basic framework.
I've never seen any Java 'pattern' that looks like that or any pattern where an interface contained a class. It seemed really convoluted to me and seems like the 'versioning' aspect of it could have been accomplished in a more straightforward manner.
Thanks for the feedback. If you wouldn't mind expanding a bit on one comment you made then I will mark this ANSWERED and put it to rest.
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I don't mind interfaces containing classes per se when necessary
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I have never seen this except at this one site. Would you relate any info about where you have seen or used this or when it might be necessary?

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