File class and an executable method?

Unix and Windows files have attributes that indicate if they are executable. Why doesn�t Java have a �canBeExecuted� method in its File class?
This is a question in an assignment that I am doing and I don't can't really figure out why there is no methos like this.
Please help, and and all ideas would be most appreciated.

I give up - where does windows have that?ntfs? what version of windows are you on! :)
right-click->properties->security ...Sorry -- I picked a file at random and did
rightclick->properties. There's no Security tab on my
Windows (2000) computer.Probably because "Use simply file sharing" is checked in
some tab (can't find it because I don't have access on this
computer). I think it is under "Tools->Folder Options->View->
Use Simple File Sharing". (under "Tools" in explorer).

Similar Messages

Where do i place my html files,classes and Java files

Can any one plz help me out here. I'm using Tomcat3.2.1 to
run my servlets, I have written the servlets and gotten
tomcat to run as well. What confuses me now is where my
files should be placed.
- Do i have to create a special directory to contain my html
files ?
- another directory for my servlet classes ?
- how about my .java files ?
- and how should i call my servlet from the html code ?
HEEEEEEEEEEEEEEEEEEEEELLLLLLLLLLLLLLPPPPPPPPPPPP!!!!!!!!!!!!!!!

hi,
you can my post here http://forum.java.sun.com/thread.jsp?forum=33&thread=302433

Calling BAPI in the Classes and also in Methods

hi ,
is it possible to call the BAPI function module in the classes, i am creating BSP for creating the material, i think BDC will not work properly in this case, so i want to use BAPI for creating material , so please suggest me which way is suitable for this, and let me know is it possible to use BAPI's in classes which is created throw SE24 tcode.
srujan.p

Hi,
yes, it is possible to call BAPI from method. It is just normal function module call. Generally I am trying to avoid BDC. It almost always brings some problems. There is BAPI BAPI_MATERIAL_SAVEDATA for maintaining material master data.
Cheers

Abstract class and a static method

Can i call a static method within an abstract class ?

public class AbstractDemo {
public static void main(String[] args) {
    BiPlane biPlane = new BiPlane();
    System.out.println("biplane propulsion = " + biPlane.getPropulsionType());
    JumboJet jumboJet = new JumboJet();
    System.out.println("jet load = " + jumboJet.confirmMaxLoad());
    System.out.println("jet speed = " + jumboJet.getTopSpeed());
    System.out.println(Airplane.confirmMaxLoad());
abstract class Airplane {
static String confirmMaxLoad() {
    return "go_get_um, yeehaa!";
public abstract String getPropulsionType();
abstract String getTopSpeed();
class BiPlane extends Airplane {
public BiPlane() {
    System.out.println("BiPlane constructor");
static String confirmMaxLoad() {
    return "400 lbs";
public String getPropulsionType() {
    return "propeller";
final String getTopSpeed() {
    return "130 knots";
class JumboJet extends Airplane {
public JumboJet() {
    System.out.println("JumboJet constructor");
public String getPropulsionType() {
    return "jet";
public String getTopSpeed() {
    return "mach .87";
}

File Class and Applets

Hello Java Fans!!
I was wondering if anyone knows how to make Applets read Files
from the hard drive on a local machine. (Or where to find
information about it?)
Thanks a bunch in advance!
A.

Hi,
How about accessing a directory on the web server, where the applet file resides? I would like to display
the contents of some web server directories on the client's browser in an applet, but I keep running into
the applet security restrictions. I am using Java 1.1 as my language version, this way my users don't have
to install the Java plug-in for their browser. I would rather not use signed applets or anything like that.
Thanks,
Steve Cromer

How populate and execute methods gets called in UserDefined Action Classes?

In Struts2, if we override methods populate() and execute() , then if we made any request to some Action class which overrides these methods, then how does it look for these 2 methods??
and why populate() method called first and later execute() method????
Harishwar
Edited by: Harishwar_Madhya on Sep 3, 2010 2:47 AM
Edited by: Harishwar_Madhya on Sep 3, 2010 2:49 AM

45RPMSoftware wrote:
Thanks for this. Alas, I do not have the source code used to generate the jar file, and I have no means of getting it. I imagine, therefore, that I will not be able to update the manifest file.The manifest file is just a simple text file.
You can get at it by unpacking/repacking the jar file with the jar utility (tar like syntax).
... I assume that classpath is rather like the unix path.It specifies a list of jar files and directories containing java class files (and more).
Is there anything that defines the classpath for each login session and, if so, how do I add to it?As the link I posted says;
you can set a CLASSPATH env.var.

Converting a string to Class object and calling its method

I have recently moved to Java and I need help on this specific issue given below.
I have to do this :
ValModule1 val1 = new ValModule1();
ValModule2 val2 = new ValModule2();
if(val1.checkModule(xmlDocument)){
$i++;
There are many ValModule* classes and they all have the method called checkModule in them. I need to instantiate each class and run the checkMethod which returns true or false. My problem is that I am trying to get the name of the module (if it is ValModule1 or 2 or 3) from the user. What I get from the user is the name of the class for which I should call checkModule method on.
how can I convert this string validationname given by the user and instantiate that class and call the method?
I have tried this:
String str="c:/xpathtest/src/Plugin_Config.xml";
File xmlDocument = new File(str);
String cls = "ValModule1"; // assuming this is what the user gave me
Class t = Class.forName("ValModule1");
Object o = t.newInstance();
After that if I try
if(o.checkModule(xmlDocument)){
$i++;
It gives me an error saying that it is not an existing method
cannot resolve symbol
[javac] symbol : method checkModule (java.io.File)
[javac] location: class java.lang.Object
[javac] if(o.checkModule(xmlDocument)){
[javac] ^
[javac] 1 error
Can you please let me know where I am screwing up :-) ? If you need me to put both the programs I can do that too. Thanks in Anticipation

I have recently moved to Java and I need help on this
specific issue given below.
I have to do this :
ValModule1 val1 = new ValModule1();
ValModule2 val2 = new ValModule2();
if(val1.checkModule(xmlDocument)){
$i++;
There are many ValModule* classes and they all have
the method called checkModule in them. I need to
instantiate each class and run the checkMethod which
returns true or false. My problem is that I am trying
to get the name of the module (if it is ValModule1 or
2 or 3) from the user. What I get from the user is
the name of the class for which I should call
checkModule method on.
how can I convert this string validationname given by
the user and instantiate that class and call the
method?
Define an interface containing the method all your classes have in common, cast the Object reference returned by newInstance to that interface, then you can call that method.
Good Luck
Lee

I want the Definitaion fo Class and its Components in ABAP . With Example

Gowri

Classes
Classes are templates for objects. Conversely, you can say that the type of
an object is the same as its class. A class is an abstract description of an object. You could say that it is a set of instructions for building an object. The attributes
of objects are defined by the components of the class, which describe the
state and behavior of objects.

Local and Global Classes
Classes in ABAP Objects can be declared either globally or locally. You define global classes and interfaces in the Class Builder (Transaction SE24) in the
ABAP Workbench. They are stored centrally in class pools in the class library
in the R/3 Repository. All of the ABAP programs in an R/3 System can access the global classes. Local classes are defined within an ABAP program. Local classes and interfaces can only be used in the program in which they are defined. When you use a class in an ABAP program, the system first searches for a local class with the specified name. If it does not find one, it then looks for a global class. Apart from the visibility question, there is no difference between using a global class and using a local class.
There is, however, a significant difference in the way that local and global classes are designed. If you are defining a local class that is only used in a single program, it is usually sufficient to define the outwardly visible components so that it fits into that program. Global classes, on the other hand, must be able to be used anywhere. This means that certain restrictions apply when you define the interface of a global class, since the system must be able to guarantee that any program using an object of a global class can recognize the data type of each interface parameter.
The following sections describe how to define local classes and interfaces in an ABAP program. For information about how to define local classes and interfaces, refer to the Class Builder section of the ABAP Workbench Tools documentation.
Defining Local Classes
Local classes consist of ABAP source code, enclosed in the ABAP statements CLASS ... ENDCLASS. A complete class definition consists of a declaration part and, if required, an implementation part. The declaration part of a class <class> is a statement block:
CLASS <class> DEFINITION.
ENDCLASS.
It contains the declaration for all components (attributes, methods, events) of the class. When you define local classes, the declaration part belongs to the global program data. You should therefore place it at the beginning of the program.
If you declare methods in the declaration part of a class, you must also write an implementation part for it. This consists of a further statement block:
CLASS <class> IMPLEMENTATION.
ENDCLASS.
The implementation part of a class contains the implementation of all methods of the class. The implementation part of a local class is a processing block. Subsequent coding that is not itself part of a processing block is therefore not accessible.
Structure of a Class
The following statements define the structure of a class:
A class contains components
Each component is assigned to a visibility section
Classes implement methods
The following sections describe the structure of classes in more detail.
Class Components
The components of a class make up its contents. All components are declared in the declaration part of the class. The components define the attributes of the objects in a class. When you define the class, each component is assigned to one of the three visibility sections, which define the external interface of the class. All of the components of a class are visible within the class. All components are in the same namespace. This means that all components of the class must have names that are unique within the class.
There are two kinds of components in a class - those that exist separately for each object in the class, and those that exist only once for the whole class, regardless of the number of instances. Instance-specific components are known as instance components. Components that are not instance-specific are called static components.
In ABAP Objects, classes can define the following components. Since all components that you can declare in classes can also be declared in interfaces, the following descriptions apply equally to interfaces.
Attributes
Attributes are internal data fields within a class that can have any ABAP data type. The state of an object is determined by the contents of its attributes. One kind of attribute is the reference variable. Reference variables allow you to create and address objects. Reference variables can be defined in classes, allowing you to access objects from within a class.
Instance Attributes
The contents of instance attributes define the instance-specific state of an object. You declare them using the DATA statement.
Static Attributes
The contents of static attributes define the state of the class that is valid for all instances of the class. Static attributes exist once for each class. You declare them using the CLASS-DATA statement. They are accessible for the entire runtime of the class.
All of the objects in a class can access its static attributes. If you change a static attribute in an object, the change is visible in all other objects in the class.
Methods
Methods are internal procedures in a class that define the behavior of an object. They can access all of the attributes of a class. This allows them to change the data content of an object. They also have a parameter interface, with which users can supply them with values when calling them, and receive values back from them The private attributes of a class can only be changed by methods in the same class.
The definition and parameter interface of a method is similar to that of function modules. You define a method <met> in the definition part of a class and implement it in the implementation part using the following processing block:
METHOD <meth>.
ENDMETHOD.
You can declare local data types and objects in methods in the same way as in other ABAP procedures (subroutines and function modules). You call methods using the CALL METHOD statement.
Instance Methods
You declare instance methods using the METHODS statement. They can access all of the attributes of a class, and can trigger all of the events of the class.
Static Methods
You declare static methods using the CLASS-METHODS statement. They can only access static attributes and trigger static events.
Special Methods
As well as normal methods, which you call using CALL METHOD, there are two special methods called CONSTRUCTOR and CLASS_CONSTRUCTOR, which are automatically called when you create an object (CONSTRUCTOR) or when you first access the components of a class (CLASS_CONSTRUCTOR).
Events
Objects or classes can use events to trigger event handler methods in other objects or classes. In a normal method call, one method can be called by any number of users. When an event is triggered, any number of event handler methods can be called. The link between the trigger and the handler is not established until runtime. In a normal method call, the calling program determines the methods that it wants to call. These methods must exist. With events, the handler determines the events to which it wants to react. There does not have to be a handler method registered for every event.
The events of a class can be triggered in the methods of the same class using the RAISE EVENT statement. You can declare a method of the same or a different class as an event handler method for the event <evt> of class <class> using the addition FOR EVENT <evt> OF <class>.
Events have a similar parameter interface to methods, but only have output parameters. These parameters are passed by the trigger (RAISE EVENT statement) to the event handler method, which receives them as input parameters.
The link between trigger and handler is established dynamically in a program using the SET HANDLER statement. The trigger and handlers can be objects or classes, depending on whether you have instance or static events and event handler methods. When an event is triggered, the corresponding event handler methods are executed in all registered handling classes.
Instance Events
You declare instance events using the EVENTS statement. An instance event can only be triggered in an instance method.
Static Events
You declare static events using the CLASS-EVENTS statement. All methods (instance and static methods) can trigger static events. Static events are the only type of event that can be triggered in a static method.
See also Triggering and Handling Events.
Types
You can define your own ABAP data types within a class using the TYPES statement. Types are not instance-specific, and exist once only for all of the objects in a class.
Constants
Constants are special static attributes. You set their values when you declare them, and they can then no longer be changed. You declare them using the CONSTANTS statement. Constants are not instance-specific, and exist once only for all of the objects in a class.
Visibility Sections
You can divide the declaration part of a class into up to three visibility areas:
CLASS <class> DEFINITION.
PUBLIC SECTION.
PROTECTED SECTION.
PRIVATE SECTION.
ENDCLASS.
These areas define the external visibility of the class components, that is, the interface between the class and its users. Each component of a class must be assigned to one of the visibility sections.
Public Section
All of the components declared in the public section are accessible to all users of the class, and to the methods of the class and any classes that inherit from it. The public components of the class form the interface between the class and its users.

Protected Section
All of the components declared in the protected section are accessible to all methods of the class and of classes that inherit from it. Protected components form a special interface between a class and its subclasses. Since inheritance is not active in Release 4.5B, the protected section currently has the same effect as the private section.
Private Section
Components that you declare in the private section are only visible in the methods of the same class. The private components are not part of the external interface of the class.
Encapsulation
The three visibility areas are the basis for one of the important features of object orientation - encapsulation. When you define a class, you should take great care in designing the public components, and try to declare as few public components as possible. The public components of global classes may not be changed once you have released the class.
For example, public attributes are visible externally, and form a part of the interface between an object and its users. If you want to encapsulate the state of an object fully, you cannot declare any public attributes. As well as defining the visibility of an attribute, you can also protect it from changes using the READ-ONLY addition.
"Example :
CLASS C_COUNTER DEFINITION.
PUBLIC SECTION.
 METHODS: SET_COUNTER IMPORTING VALUE(SET_VALUE) TYPE I,
 INCREMENT_COUNTER,
 GET_COUNTER EXPORTING VALUE(GET_VALUE) TYPE I.
PRIVATE SECTION.
 DATA COUNT TYPE I.
ENDCLASS.
CLASS C_COUNTER IMPLEMENTATION.
METHOD SET_COUNTER.
 COUNT = SET_VALUE.
ENDMETHOD.
METHOD INCREMENT_COUNTER.
 ADD 1 TO COUNT.
ENDMETHOD.
METHOD GET_COUNTER.
 GET_VALUE = COUNT.
ENDMETHOD.
ENDCLASS.
The class C_COUNTER contains three public methods - SET_COUNTER, INCREMENT_COUNTER, and GET_COUNTER. Each of these works with the private integer field COUNT. Two of the methods have input and output parameters. These form the data interface of the class. The field COUNT is not outwardly visible.
Reward points if it is usefull...
Girish

'Basic' external actionscript file/class usage

Hey All,
I'm a bit baffled by something that should, in my humble opinion, be a piece of cake...
The setup is really easy. A simple application with a single textinput, a button and a text component.
When the button is clicked a function is called that sets the text from the inputfield to the text component.
code:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
 <mx:Script>
 <![CDATA[
 public function click(inputText:String):void {
 outPutTxt.text = inputText;
 ]]>
 </mx:Script>
 <mx:TextInput x="10" y="10" id="inputTxt"/>
 <mx:Button x="178" y="10" label="Button" id="Btn" click="{click(inputTxt.text)}"/>
 <mx:Text x="251" y="12" text="Text" id="outPutTxt"/>
</mx:Application>
As I said, really easy.
What I want to do is put the function 'click' into an external actionscript file or class. And still be able to, from within the external file, modify the outPutTxt stuff.
I'm aware that I could create a public bindable variable inside of the external file and then bind the outPutTxt to that variable, but I would really like to be able to 'simply' force the value...
Is that possible? If yes: how plix
If it's not possible, I'd like to know as well! And in that case, how would I then re-use the same instance of a class/file in multiple seperate components? Say I got a 'login' thingie where a user logs in (data stored externally in a seperate actionscript file/class) and I want to re-use that information on other pages... Or is this done automatically?
Any and all comments/answers are higly appreciated!
Pieter

Hey Levancho,
thanks for your answer!! Much appreciated.
However, the code you proposed threw an error...
Errormessage:
ReferenceError: Error #1069: Property outPutTxt not found on controls.Control and there is no default value.
 at controls::Control/btnClick()[C:\...\FlexTest_03\src\controls\Control.as:13]
 at FlexTest_03/__Btn_click()[C:\...\FlexTest_03\src\FlexTest_03.mxml:11]
So I tried something else where I bind the text in my OutPutTxt to a variable inside of the external class file.
Code:
Class:
package controls
 public class Control
 [Bindable]
 public var outPutText:String = "";
 public function Control()
 public function btnClick(inputText:String):void {
 this.outPutText = inputText;
Mxml:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
 <mx:Script>
 <![CDATA[
 import controls.Control;
 [Bindable]
 private var control:Control = new Control();
 ]]>
 </mx:Script>
 <mx:TextInput x="10" y="10" id="inputTxt"/>
 <mx:Button x="178" y="10" label="Button" id="Btn" click="{control.btnClick(inputTxt.text)}"/>
 <mx:Text x="251" y="12" id="outPutTxt" text="{control.outPutText}"/>
</mx:Application>
And this basically did what I wanted to do... so I just need to do some major binding between my application and the classes I'll be using for my business logic.
Now for something else entirely...
Is there a way for me to pass the instance of my class between flex components?
Pieter

How do I access classes and methods defined in a wsdl file

I have been provided a wsdl file I need to find out how do I access classes and methods defined in a wsdl file directly instead of doing a wsdl2java...

Several comments :
1- is there any reason to have blank chars inserted after the path ? Seems that you already have a problem there. If possible, try to solve the problem at the source
2- the end of line char is usually CR (Carriage Return, aka ASCII char 13 = $0D = Control-D). But LF (Line Feed = 10 = $0A = control-A) is also used (platform dependent). In LV, you can use the "Concatenate strings" function to add/insert control chars (found in the String Control Palette). However, this will not solve your problem of unwanted added blank chars at the end of your string.
3- you can use the Trim white space.vi (in the "Additionnal string functions" sub-palette) to remove ALL the spaces in your string
4- you can build your own "end space remover" function. :
reverse the string, wire to a "Match pattern" function, use " +" (space + "+") to search for any number of spaces, reverse again the "after substring".
5- there is no point 5 :-)
You may find interesting description of ASCII chars here
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...

Abstract classes and methods with dollar.decimal not displaying correctly

Hi, I'm working on a homework assignment and need a little help. I have two classes, 1 abstract class, 1 extends class and 1 program file. When I run the program file, it executes properly, but the stored values are not displaying correctly. I'm trying to get them to display in the dollar format, but it's leaving off the last 0. Can someone please offer some assistance. Here's what I did.
File 1
public abstract class Customer//Using the abstract class for the customer info
private String name;//customer name
private String acctNo;//customer account number
private int branchNumber;//The bank branch number
//The constructor accepts as arguments the name, acctNo, and branchNumber
public Customer(String n, String acct, int b)
 name = n;
 acctNo = acct;
 branchNumber = b;
//toString method
public String toString()
String str;
 str = "Name: " + name + "\nAccount Number: " + acctNo + "\nBranch Number: " + branchNumber;
 return str;
//Using the abstract method for the getCurrentBalance class
public abstract double getCurrentBalance();
}file 2
public class AccountTrans extends Customer //
 private final double
 MONTHLY_DEPOSITS = 100,
 COMPANY_MATCH = 10,
 MONTHLY_INTEREST = 1;
 private double monthlyDeposit,
 coMatch,
 monthlyInt;
 //The constructor accepts as arguments the name, acctNo, and branchNumber
 public AccountTrans(String n, String acct, int b)
 super(n, acct, b);
 //The setMonthlyDeposit accepts the value for the monthly deposit amount
 public void setMonthlyDeposit(double deposit)
 monthlyDeposit = deposit;
 //The setCompanyMatch accepts the value for the monthly company match amount
 public void setCompanyMatch(double match)
 coMatch = match;
 //The setMonthlyInterest accepts the value for the monthly interest amount
 public void setMonthlyInterest(double interest)
 monthlyInt = interest;
 //toString method
 public String toString()
 String str;
 str = super.toString() +
 "\nAccount Type: Hybrid Retirement" +
 "\nDeposits: $" + monthlyDeposit +
 "\nCompany Match: $" + coMatch +
 "\nInterest: $" + monthlyInt;
 return str;
 //Using the getter method for the customer.java fields
 public double getCurrentBalance()
 double currentBalance;
 currentBalance = (monthlyDeposit + coMatch + monthlyInt) * (2);
 return currentBalance;
}File 3
 public static void main(String[] args)
//Creates the AccountTrans object
 AccountTrans acctTrans = new AccountTrans("Jane Smith", "A123ZW", 435);
 //Created to store the values for the MonthlyDeposit,
 //CompanyMatch, MonthlyInterest
 acctTrans.setMonthlyDeposit(100);
 acctTrans.setCompanyMatch(10);
 acctTrans.setMonthlyInterest(5);
 DecimalFormat dollar = new DecimalFormat("#,##0.00");
 //This will display the customer's data
 System.out.println(acctTrans);
 //This will display the current balance times 2 since the current
 //month is February.
 System.out.println("Your current balance is $"
 + dollar.format(acctTrans.getCurrentBalance()));
 }

Get a hair cut!
h1. The Ubiquitous Newbie Tips
* DON'T SHOUT!!!
* Homework dumps will be flamed mercilessly. [Feelin' lucky, punk? Well, do ya'?|http://www.youtube.com/watch?v=1-0BVT4cqGY]
* Have a quick scan through the [Forum FAQ's|http://wikis.sun.com/display/SunForums/Forums.sun.com+FAQ].
h5. Ask a good question
* Don't forget to actually ask a question. No, The subject line doesn't count.
* Don't even talk to me until you've:
 (a) [googled it|http://www.google.com.au/] and
 (b) had a squizzy at the [Java Cheat Sheet|http://mindprod.com/jgloss/jcheat.html] and
 (c) looked it up in [Sun's Java Tutorials|http://java.sun.com/docs/books/tutorial/] and
 (d) read the relevant section of the [API Docs|http://java.sun.com/javase/6/docs/api/index-files/index-1.html] and maybe even
 (e) referred to the JLS for "advanced" questions.
* [Good questions|http://www.catb.org/~esr/faqs/smart-questions.html#intro] get better Answers. It's a fact. Trust me on this one.
 - Lots of regulars on these forums simply don't read badly written questions. It's just too frustrating.
 - FFS spare us the SMS and L33t speak! Pull your pants up, and get a hair cut!
 - Often you discover your own mistake whilst forming a "Good question".
 - Often you discover that you where trying to answer "[the wrong question|http://blog.aisleten.com/2008/11/20/youre-asking-the-wrong-question/]".
 - Many of the regulars on these forums will bend over backwards to help with a "Good question",
 especially to a nuggetty problem, because they're interested in the answer.
* Improve your chances of getting laid tonight by writing an SSCCE
 - For you normal people, That's a: Short Self-Contained Compilable (Correct) Example.
 - Short is sweet: No-one wants to wade through 5000 lines to find your syntax errors!
 - Often you discover your own mistake whilst writing an SSCCE.
 - Often you solve your own problem whilst preparing the SSCCE.
 - Solving your own problem yields a sense of accomplishment, which makes you smarter ;-)
h5. Formatting Matters
* Post your code between a pair of {code} tags
 - That is: {code} ... your code goes here ... {code}
 - This makes your code easier to read by preserving whitespace and highlighting java syntax.
 - Copy&paste your source code directly from your editor. The forum editor basically sucks.
 - The forums tabwidth is 8, as per [the java coding conventions|http://java.sun.com/docs/codeconv/].
 - Indents will go jagged if your tabwidth!=8 and you've mixed tabs and spaces.
 - Indentation is essential to following program code.
 - Long lines (say > 132 chars) should be wrapped.
* Post your error messages between a pair of {code} tags:
 - That is: {code} ... errors here ... {code}
 - OR: [pre]{noformat} ... errors here ... {noformat}[/pre]
 - To make it easier for us to find, Mark the erroneous line(s) in your source-code. For example:
 System.out.println("Your momma!); // <<<< ERROR 1
 - Note that error messages are rendered basically useless if the code has been
 modified AT ALL since the error message was produced.
 - Here's [How to read a stacktrace|http://www.0xcafefeed.com/2004/06/of-thread-dumps-and-stack-traces/].
* The forum editor has a "Preview" pane. Use it.
 - If you're new around here you'll probably find the "Rich Text" view is easier to use.
 - WARNING: Swapping from "Plain Text" view to "Rich Text" scrambles the markup!
 - To see how a posted "special effect" is done, click reply then click the quote button.
If you (the newbie) have covered these bases *you deserve, and can therefore expect, GOOD answers!*
h1. The pledge!
We the New To Java regulars do hereby pledge to refrain from flaming anybody, no matter how gumbyish the question, if the OP has demonstrably tried to cover these bases. The rest are fair game.

Weblogic startup class and EAR file

Hi,
I am using WL 8.1.5.
I have a weblogic starup class MyStartup that implements T3StartupDef. (it does not specify package).
I jar-ed it. And I placed MyStartup.jar file into the MyEA.ear file. And I placed that into applications dir.
With WL Console I defined the startup class and for the ClassName specified MyStartup.
Yet I get the java.lang.ClassNotFoundException.
I also have a Manifest.mf file with
Class-Path: MyStartup.jar
Please help me solve this problem, I literally don't know what to do next.
MB

Hi,
thanks.
This seems like a completely opposite method of the depplying startup class with weblogic console.
Does my class still need to implement T3StartupDef?
I get this exception. And my classnotfound is still there.
Exception:weblogic.management.ApplicationException: startup.MyStartup
     at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.createContainer(SlaveDeployer.java:2484)
     at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.prepare(SlaveDeployer.java:2396)
     at weblogic.management.deploy.slave.SlaveDeployer.processPrepareTask(SlaveDeployer.java:883)
     at weblogic.management.deploy.slave.SlaveDeployer.prepareDelta(SlaveDeployer.java:591)
     at weblogic.management.deploy.slave.SlaveDeployer.prepareUpdate(SlaveDeployer.java:500)
     at weblogic.drs.internal.SlaveCallbackHandler$1.execute(SlaveCallbackHandler.java:25)
     at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:224)
     at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:183)
Regards,
MB

Can we make executable jar file which dont have main method?

I have a problem.
With whatever R&D i have done so far my understanding is that in order to create executable jar files i need a main method.
my problem is i have certain MIS reports which are developed in java and deployed through JSP pages...so my java program has no Main Method and only objects of the classes are being called in the JSP pages.
for e.g: i have a java class file BulkSms.class and i make an object of it in the JSP page through which my purpose is achieved by calling various method in the BulkSms through it s objects and there is no main method.
Can i make an executable jar file without a main method and if so please give me a detailed procedure of how to go about it.
i want to make it executable so tht on the click of it the MIS report is displayed from the JSP page.

I am completely ignorant of JSPs, but you can not execute a jar or any java application unless you have a main method. It sounds like you need a way to launch the JSP - can't you do this with a browser?

Using java class and variables declared in java file in jsp

hi everyone
i m trying to seperate business logic form web layer. i don't know i am doing in a right way or not.
i wanted to access my own java class and its variables in jsp.
for this i created java file like this
package ris;
import java.sql.*;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class NewClass{
 public static void main(String args[]){
 Connection con = null;
 ResultSet rs=null;
 Statement smt=null;
 try{
 Class.forName("com.mysql.jdbc.Driver").newInstance();
 con=DriverManager.getConnection("jdbc:mysql:///net","root", "anthony111");
 smt=con.createStatement();
 rs= smt.executeQuery("SELECT * FROM emp");
 while(rs.next()){
 String str = rs.getString("Name");
 }catch( Exception e){
 String msg="Exception:"+e.getMessage();
 }finally {
 try {
 if(con != null)
 con.close();
 } catch(SQLException e) {}
}next i created a jsp where i want to access String str defined in java class above.
<%--
 Document : fisrt
 Created on : Jul 25, 2009, 3:00:38 PM
 Author : REiSHI
--%>
<%@page import="ris.NewClass"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
 "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 <title>JSP Page</title>
 </head>
 <body>
 <h1><%=str%></h1>
 </body>
</html>I wanted to print the name field extracted from database by ResultSet.
but it gives error cannot find symbol str.
please help me to find right way to do this.
i am using netbeans ide.

Very bad approach
1) Think if your table contains more than one NAMEs then you will get only the last one with your code.
2) Your String is declared as local variable in the method.
3) You have not created any object of NewClass nor called the method in JSP page. Then who will call the method to run sql?
4) Your NewClass contains main method which will not work in web application, it's not standalone desktop application so remove main.
Better create an ArrayList and then call the method of NewClass and then store the data into ArrayList and return the ArrayList.
It should look like
{code:java}
package ris;
import java.sql.*;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class NewClass{
 public static ArrayList getNames(){
 Connection con = null;
 ResultSet rs=null;
 Statement smt=null;
 ArrayList nameList = new ArrayList();
 try{
 Class.forName("com.mysql.jdbc.Driver").newInstance();
 con=DriverManager.getConnection("jdbc:mysql:///net","root", "anthony111");
 smt=con.createStatement();
 rs= smt.executeQuery("SELECT * FROM emp");
 while(rs.next()){
 nameList.add(rs.getString("Name"));
 return nameList;
 }catch( Exception e){
 String msg="Exception:"+e.getMessage();
 </code><code class="jive-code jive-java">return nameList;</code><code class="jive-code jive-java">
 }finally {
 try {
 if(con != null)
 con.close();
 } catch(SQLException e) {}
 </code><code>return nameList;</code>
<code class="jive-code jive-java"> }

Open a file within a class and be able to access it?

hi,
would like to reduce the code sitting in my main within a class.
My problem is not full understanding how i can do this!
I've been thinking along the lines of declaring the fileinputstream & Bufferstream variables as Private class variables and having the code that opens the files for reading in a method. But this fails.
what i want to be able to do is to ....
have methods for opening, closing, reading in a line etc
so alls i have in my main is a loop that tests for EOF and if encountered exits.
all the donkey work is passed onto methods which will allow the breakup of the work.
this program is a console no GUI stuff envolved as I'm newish to java but not programming concepts, OOP does defeat me sometimes due to not being able to put understanding of principles into action.
here is a sample of what i thought would work
import java.io.*
import java.util.
public class readcsv
   //the Brace's were one of many attempts to try and get it working.
     // declare variables so i can use them in Methods
   FileReader fr = null;
   BufferReader br = null;
      // Verifies the file is open no more !
   Boolean FileOk;
public static void main( String [] args )
    FileOk = OpenFile(); // my method for opening the file i want read.
further code would call a readline
another method to process the data etc etc
   // Method to open the data file and load br with the 1st line of data!
Boolean FileOK()
return false;
try
    FileReader fr = new filereader("mydata.txt");
    BufferedReader br = new BufferedReader(fr);
    // Test here for the file being opened & if it is return true
catch (Exceptionerrors e) /know this isn't right but more to show
    System.err.println("failed to open the file!");
}Know the above isn't correct but i hope it give you an idea of my aim.
haven't tried passing the variables as parameters tho but since thought of it i will give this a try.
if someone could point me to a good worked tutorial or pass on a sample bit of code it would be appreciated.
eg
program will take a file name display data to the console screen then exit.
now lets look at where and what is going on type details.
also i have gone trolling google but from what i've seen it's a bit general overview stuff not like ....
any thanks.
dave.

Possible implementation:
import java.io.BufferedReader;
import java.io.FileReader;
public class Test {
    public static BufferedReader OpenFile(String fileName) throws Exception {
        return new BufferedReader(new FileReader(fileName));
    public static void processLine(String line) {
        // do something with string line
    public static void closeReader(BufferedReader in) {
        if (in != null)
            try {
                in.close();
            } catch (Exception e) {
                // TODO: handle exception
    public static void main(String[] args) {
        BufferedReader in = null;
        try {
            in = OpenFile("fileName");
            String line;
            while ((line = in.readLine()) != null) {
                processLine(line);
        } catch (Exception e) {
            // TODO: handle exception
        } finally {
            closeReader(in);
}

File class and an executable method?

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