Accessing String variables from several JAVA classes

Hi.
I have several java classes that accesses the same String variables. Instead of putting the String declarations in every java files, how can I put these declarations in a single file source, and get each java class to get the variables data from this file ?
Please advice.
Thanks.

hi, of course you can solve it by the following methods:
Method 1. define a superclass including the common string variable, and extend other classes from the superclass.
Method 2. define a class , and define your common string variable as a static variable in it. In your other classes, you can call the string variable.
Method 3. define it at your each classes.

Similar Messages

How to access static variable from a Thread class

Kindly help me.......
here's the code.....
class Thread1 extends Thread
int j=0;
myClass2 mc = new myClass2();
     public void run()
          for( int a=0;a<6;a++)
                    {try
                         { Thread.sleep(5000);
                         catch(Exception e){System.out.println("Interrupted Exception");}
                         j++;
mc.change1(i);
} System.out.println("Thread1 executes "+j+" times");
class Thread2 extends Thread
int k=0;
     myClass2 mc1 = new myClass2();
     public void run()
          for( int a=0;a<6;a++)
                    {try
                         { Thread.sleep(5000);
                         catch(Exception e){System.out.println("Interrupted Exception");}
                         k++;
mc1.change2(i);
}System.out.println("Thread2 executes "+k+" times");
class myClass2
static int i=5;
public synchronized void change1(int s)
s=6;
System.out.println("New value of i:"+s);
public synchronized void change2(int s)
s=7;
System.out.println("New value of i:"+s);
     public static void main(String args[])
Thread1 b1 = new Thread1();
Thread2 b2 = new Thread2();
     b1.start();
b2.start();
I am unable to pass the variable i in my method call in Thread1: mc.change1(i); and similarly in Thread2:mc.change2(i);

You can declare your i variable in myClass2 as public static and then simply call there
    mc.change1( myClass2.i ) ;

Help me which JNDIFactory to use to access EJB from a java class of JAR

I am confused in understanding the different JNDI factories
RMIInitialContextFactory, ApplicationInitialContextFactory and ApplicationClientInitialContextFactory
And the different namespaces like global, container local and component local.
Especially is there any relationship between the JNDI factories and the namespaces?
Or are they related to the deployment descriptors.
Because in application specific deployment descriptors (orion-ejb-jar.xml), we just map the JNDI location with the object (or its reference from ejb-jar.xml). We dont specify it can be accessed from this factory or that.
Shall we access an EJB from using any JNDI factory?
Specifically, I am stuck with what Factory to use to access an EJB from a Java class in a library (jar). The JAR is packaged with the EAR which contains the EJB Jar that I am trying to access.
THANK YOU

Ed,
As Robin said, I think you need code similar to this:
Context c = new InitialContext();
Object o = c.lookup("java:comp/env/Name");where Name is the name of your EJB as it appears in the "ejb-jar.xml"
deployment descriptor XML file.
Good Luck,
Avi.

Accessing a variable defined in one class from another class..

Greetings,
I've only been programming in as3 for a couple months, and so far I've written several compositional classes that take MovieClips as inputs to handle behaviors and interactions in a simple game I'm creating. One problem I keep coming upon is that I'd love to access the custom variables I define within one class from another class. In the game I'm creating, Main.as is my document class, from which I invoke a class called 'Level1.as' which invokes all the other classes I've written.
Below I've pasted my class 'DieLikeThePhishes'. For example, I would love to know the syntax for accessing the boolean variable 'phish1BeenHit' (line 31) from another class. I've tried the dot syntax you would use to access a MovieClip inside another MovieClip and it doesn't seem to be working for me. Any ideas would be appreciated. Thanks,
- Jeremy
package jab.enemy
import flash.display.MovieClip;
import flash.events.Event;
import jab.enemy.MissleDisappear;
public class DieLikeThePhishes
private var _clip2:MovieClip; // player
private var _clip3:MovieClip; //phish1
private var _clip4:MovieClip; //phish2
private var _clip5:MovieClip; //phish3
private var _clip6:MovieClip; //phish4
private var _clip10:MovieClip; // background
private var _clip11:MovieClip // missle1
private var _clip12:MovieClip // missle2
private var _clip13:MovieClip // missle3
private var _clip14:MovieClip // missle4
private var _clip15:MovieClip // missle5
private var _clip16:MovieClip // missle6
private var _clip17:MovieClip // missle7
private var _clip18:MovieClip // missle8
private var _clip19:MovieClip // missle9
private var _clip20:MovieClip // missle10
private var _clip21:MovieClip // missle11
private var _clip22:MovieClip // missle12
var ay1 = 0;var ay2 = 0;var ay3 = 0;var ay4 = 0;
var vy1 = 0;var vy2 = 0;var vy3 = 0;var vy4 = 0;
var phish1BeenHit:Boolean = false;var phish2BeenHit:Boolean = false;
var phish3BeenHit:Boolean = false;var phish4BeenHit:Boolean = false;
public function DieLikeThePhishes(clip2:MovieClip,clip3:MovieClip,clip4:MovieClip,clip5:MovieClip,clip6:M ovieClip,clip10:MovieClip,clip11:MovieClip,clip12:MovieClip,clip13:MovieClip,clip14:MovieC lip,clip15:MovieClip,clip16:MovieClip,clip17:MovieClip,clip18:MovieClip,clip19:MovieClip,c lip20:MovieClip,clip21:MovieClip,clip22:MovieClip)
_clip2 = clip2;_clip3 = clip3;_clip4 = clip4;_clip5 = clip5;_clip6 = clip6;
_clip10 = clip10;_clip11 = clip11;_clip12 = clip12;_clip13 = clip13;_clip14 = clip14;
_clip15 = clip15;_clip16 = clip16;_clip17 = clip17;_clip18 = clip18;_clip19 = clip19;
_clip20 = clip20;_clip21 = clip21;_clip22= clip22;
_clip3.stage.addEventListener(Event.ENTER_FRAME, onEnterFrame)
function onEnterFrame(event:Event):void
vy1+= ay1;_clip3.y += vy1; vy2+= ay2;_clip4.y += vy2;
vy3+= ay3;_clip5.y += vy3; vy4+= ay4;_clip6.y += vy4;
if (phish1BeenHit ==false)
if(_clip3.y >620)
{_clip3.y = 620;}
if (phish2BeenHit ==false)
if(_clip4.y >620)
{_clip4.y = 620;}
if (phish3BeenHit ==false)
if(_clip5.y >620)
{_clip5.y = 620;}
if (phish4BeenHit ==false)
if(_clip6.y >620)
{_clip6.y = 620;}
if (_clip11.hitTestObject(_clip3) ||_clip12.hitTestObject(_clip3)||_clip13.hitTestObject(_clip3)||_clip14.hitTestObject(_cl ip3)||_clip15.hitTestObject(_clip3)||_clip16.hitTestObject(_clip3)||_clip17.hitTestObject( _clip3)||_clip18.hitTestObject(_clip3)||_clip19.hitTestObject(_clip3)||_clip20.hitTestObje ct(_clip3)||_clip21.hitTestObject(_clip3)||_clip22.hitTestObject(_clip3))
_clip3.scaleY = -Math.abs(_clip3.scaleY);
_clip3.alpha = 0.4;
ay1 = 3
vy1= -2;
phish1BeenHit = true;
if (_clip11.hitTestObject(_clip4) ||_clip12.hitTestObject(_clip4)||_clip13.hitTestObject(_clip4)||_clip14.hitTestObject(_cl ip4)||_clip15.hitTestObject(_clip4)||_clip16.hitTestObject(_clip4)||_clip17.hitTestObject( _clip4)||_clip18.hitTestObject(_clip4)||_clip19.hitTestObject(_clip4)||_clip20.hitTestObje ct(_clip4)||_clip21.hitTestObject(_clip4)||_clip22.hitTestObject(_clip4))
_clip4.scaleY = -Math.abs(_clip4.scaleY);
_clip4.alpha = 0.4;
ay2 = 3
vy2= -2;
phish2BeenHit = true;
if (_clip11.hitTestObject(_clip5) ||_clip12.hitTestObject(_clip5)||_clip13.hitTestObject(_clip5)||_clip14.hitTestObject(_cl ip5)||_clip15.hitTestObject(_clip5)||_clip16.hitTestObject(_clip5)||_clip17.hitTestObject( _clip5)||_clip18.hitTestObject(_clip5)||_clip19.hitTestObject(_clip5)||_clip20.hitTestObje ct(_clip5)||_clip21.hitTestObject(_clip5)||_clip22.hitTestObject(_clip5))
_clip5.scaleY = -Math.abs(_clip5.scaleY);
_clip5.alpha = 0.4;
ay3 = 3
vy3= -2;
phish3BeenHit = true;
if (_clip11.hitTestObject(_clip6) ||_clip12.hitTestObject(_clip6)||_clip13.hitTestObject(_clip6)||_clip14.hitTestObject(_cl ip6)||_clip15.hitTestObject(_clip6)||_clip16.hitTestObject(_clip6)||_clip17.hitTestObject( _clip6)||_clip18.hitTestObject(_clip6)||_clip19.hitTestObject(_clip6)||_clip20.hitTestObje ct(_clip6)||_clip21.hitTestObject(_clip6)||_clip22.hitTestObject(_clip6))
_clip6.scaleY = -Math.abs(_clip6.scaleY);
_clip6.alpha = 0.4;
ay4 = 3
vy4= -2;
phish4BeenHit = true;
if (_clip3.y > 10000)
_clip3.x = 1000 +3000*Math.random()-_clip10.x;
_clip3.y = 300;
_clip3.alpha = 1;
_clip3.scaleY = Math.abs(_clip3.scaleY);
ay1 = vy1 = 0;
phish1BeenHit = false;
if (_clip4.y > 10000)
_clip4.x = 1000 +3000*Math.random()-_clip10.x;
_clip4.y = 300;
_clip4.alpha = 1;
_clip4.scaleY = Math.abs(_clip4.scaleY);
ay2 = vy2 = 0;
phish2BeenHit = false;
if (_clip5.y > 10000)
_clip5.x = 1000 +3000*Math.random()-_clip10.x;
_clip5.y = 300;
_clip5.alpha = 1;
_clip5.scaleY = Math.abs(_clip5.scaleY);
ay3 = vy3 = 0;
phish3BeenHit = false;
if (_clip6.y > 10000)
_clip6.x = 1000 +3000*Math.random()-_clip10.x;
_clip6.y = 300;
_clip6.alpha = 1;
_clip6.scaleY = Math.abs(_clip6.scaleY);
ay4 = vy4 = 0;
phish4BeenHit = false;
var missleDisappear1 = new MissleDisappear(_clip11,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear2 = new MissleDisappear(_clip12,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear3 = new MissleDisappear(_clip13,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear4 = new MissleDisappear(_clip14,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear5 = new MissleDisappear(_clip15,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear6 = new MissleDisappear(_clip16,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear7 = new MissleDisappear(_clip17,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear8 = new MissleDisappear(_clip18,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear9 = new MissleDisappear(_clip19,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear10 = new MissleDisappear(_clip20,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear11 = new MissleDisappear(_clip21,_clip3,_clip4,_clip5,_clip6,_clip10);
var missleDisappear12 = new MissleDisappear(_clip22,_clip3,_clip4,_clip5,_clip6,_clip10);

I would approach it in much the same way as you would in java, by making getters and setters for all of your class variables.
Getters being for returning the values, Setters being for setting them.
So you would make a get function for the variable you want to access ala:
function get1PhishBeenHit():boolean {
return this.phish1BeenHit;
Then to access the value of that variable from outwith the class:
var result:boolean = ClassInstanceName.get1PhishBeenHit();

Passing numerical variables to and from a Java class

I'm trying to do something that seems like it should be fairly simple, but apparently it isn't. I'm new to Java and JDBC, so I'm hoping that I'm missing something fundamental and fairly basic.
Basically, I want to pass a set of (number) variables to a Java class from a PL/SQL Procedure, and get back a series of numbers based on calculations to the first set of numbers. (In my real world project, I have to perform a series of matrix calculations to determine regression parameters for two sets of data, but we'll keep this simple.) However, I can find nothing that tells me how to do this, and I'm receiving a series of errors when I attempt it.
For example, let's say I want to send in two decimal numbers, a and b, and receive back the sum s, the difference d, the product p and the quotient q. So, the java class would be:
* MathEx.java
class MathEx {
public static void main(double a, double b, double sum, double diff, double prod, double quo) {
sum = a + b;
diff = a - b;
prod = a * b;
quo = a / b;
Fairly simple, right? It compiles fine using "javac MathEx.java", and then I load the class into the database:
loadjava -u steve/steve MathEx.class
Everything works great. Now, I create a wrapper Procedure. This is where the problem comes in. How do I declare the incoming and outgoing parameters in the Procedure? No matter what I try, I get " the declaration of "MathEx.main([whatever])" is incomplete or malformed"
The procedure I'm trying is:
create or replace procedure Call_MathEx
a NUMBER,
b NUMBER,
s NUMBER,
d NUMBER,
p NUMBER,
q NUMBER
AS
language JAVA
name 'MathEx.main(oracle.sql.NUMBER,oracle.sql.NUMBER,
oracle.sql.NUMBER,oracle.sql.NUMBER,oracle.sql.NUMBER,oracle.sql.NUMBER,)';
I've tried the following values for possible variable types in the "name 'MathEx.main(" statement:
oracle.sql.NUMBER
java.lang.Number
java.lang.Double
java.Math.BigDecimal
The only thing I can get to work is if I just use "java.lang.string[]" and send everything at once, then use parseDouble() to read the parameters inside the Java class. However, that makes it impossible to then read the new values of the sum, difference, product and quotient in the calling procedure, since the variable retain the same value as before the call to the Java class.
Any help is greatly appreciated.

Java Stored Procedures Developers Guide (part of the docs and here on OTN) would probably help.
I suspect you need:
create or replace procedure Call_MathEx
a IN NUMBER,
b IN NUMBER,
s OUT NUMBER,
d OUT NUMBER,
p OUT NUMBER,
q OUT NUMBER
AS
language JAVA
name 'MathEx.main(oracle.sql.NUMBER,oracle.sql.NUMBER,
oracle.sql.NUMBER,oracle.sql.NUMBER,oracle.sql.NUMBER,oracle.sql.NUMBER,)';
Not sure, I always let JDeveloper handle it for me :)

Accessing env-entry value from a java class

Hi,
I have my env-entry element declared in ejb-jar.xml like this
<env-entry>
<env-entry-name>ConfigFile</env-entry-name>
<env-entry-type>java.lang.String</env-entry-type>
<env-entry-value>centaur</env-entry-value>
</env-entry>
and if I access that value from the EJB of that ejb-jar.xml, it is giving the right value. But when I am trying to retrieve the same from a java class, that is throwing exception "javax.naming.NameNotFoundException: Unable to resolve 'ConfigFile' Resolved ; remaining name 'ConfigFile'"
I think this is because env-entry has access to only EJB to maintain security?
or can env-entry elemenets cab be accessed outside the EJB and some thing I am doing wrong here?
can some one help me here?

Hey Frank,
The JCo, DI API and DB are all on PL 18. I have found that the error only occurs for one business partner, and that business partner had a service contract added to it the day before the error started to occur. Also the business partner in question is the only business partner with a service contract which would explain why it is the only one experiencing these problems. It could be a coincidence but I will let you know what the outcome is.
Carla

Accessing public variables from other classes

Probably a simple questions, but how can I access a variable from another class. My exact situation is as follows.
A class called WorldCalender has a variable which is defined: public int hour; (the value is given to it elsewhere).
I want to access this variable and increase it by one in a subroutine in the class Hour. In this class I have put: WorldCalender.hour++; but it doesn't seem to work. How should I do it?

don't expose the hour variable at all.
have a method eg addToHourBy( int hrs )
Probably a simple questions, but how can I access a
variable from another class. My exact situation is as
follows.
A class called WorldCalender has a variable which is
defined: public int hour; (the value is given to it
elsewhere).
I want to access this variable and increase it by one
in a subroutine in the class Hour. In this class I
have put: WorldCalender.hour++; but it doesn't seem to
work. How should I do it?

Accessing managed-beans property from simple java class

I have managed bean that is registered in faces-config.xml:
<managed-bean>
<managed-bean-name>documentReportsBean</managed-bean-name>
<managed-bean-class>[myApp].beans.DocumentReportsBean</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
I want to access property of documentReportsBean from other java class without registering managed-property in faces-config. How can I do that?

Thank you, what I needed was someone saying the right word. "ValueBinding" in this case.. :)
Two lines:
ValueBinding vb = FacesContext.getCurrentInstance().getApplication().createValueBinding("#{documentReportsBean}");
DocumentReportsBean pbean = (DocumentReportsBean) vb.getValue(FacesContext.getCurrentInstance());
gives my full control. Nice

Accessing a variable form a super class

Hi guys, its my first post in this forum, i am student and learning some java. I find it very interesting but have some problems
My question is : How to access a variable from a superclass
Here is my program:
class superclass
     int i = 10, j= 20;
     void display()
     System.out.println("i in super is:" +i);
     System.out.println("j in super is:" +j);
class child extends superclass
     int i,j;
     void display()
     System.out.println("i in child is:" +i);
     System.out.println("j in child is:" +j);
class prgdemo
     public static void main(String args[])
     superclass s =new superclass();
     s.display();
     child c = new child();
     c.display();
}Thanks for your replies

This is only true of nested subclasses. Private
fields are HIDDEN to ALL code contained outside of
the enclosing class.You are a very bad racist man:class superclass {
     private int i = 10;
     private int j= 20;
     public class child extends superclass
          int i= 42,j= 54;
          void display()
          System.out.println("i in child is:" +i);
          System.out.println("j in child is:" +j);
          System.out.println("super's i is:" +super.i);
          System.out.println("super's j is:" + super.j);
          System.out.println("outer's i is:" + superclass.this.i);
          System.out.println("outer's j is:" + superclass.this.j);
     void display()
     System.out.println("i in super is:" +i);
     System.out.println("j in super is:" +j);
}kind regards,
Jos (eeeww!)

How to call a Java class from another java class ??

Hi ..... can somebody plz tell me
How to call a Java Class from another Java Class assuming both in the same Package??
I want to call the entire Java Class (not any specific method only........I want all the functionalities of that class)
Please provide me some slotuions!!
Waiting for some fast replies!!
Regards
Smita Mohanty

Hi Smita,
you just need to create an object of that class,thats it. Then you will be able to execute each and every method.
e.g.
you have developed A.java and B.java, both are in same package.
in implementaion of B.java
class B
            A obj = new A();
             //to access A's methods
             A.method();
            // to access A's variable
            //either
           A.variable= value.
           //or
           A.setvariable() or A.getvariable()

Binding a JavaFX variable to a Java class instance variable

Hi,
I am pretty new to JavaFX but have been developing in Java for many years. I am trying to develop a JavaFX webservice client. What I am doing is creating a basic scene that displays the data values that I am polling with a Java class that extends Thread. The Java class is reading temperature and voltage from a remote server and storing the response in an instance variable. I would like to bind a JavaFx variable to the Java class instance variable so that I can display the values whenever they change.
var conn: WebserviceConnection; // Java class that extends Thread
var response: WebserviceResponse;
try {
conn = new WebserviceConnection("some_url");
conn.start();
Thread.sleep(10000);
} catch (e:Exception) {
e.printStackTrace();
def bindTemp = bind conn.getResponse().getTemperature();
def bindVolt = bind conn.getResponse().getVoltage();
The WebserviceConnection class is opening a socket connection and reading some data in a separate thread. A regular socket connection is used because the server is not using HTTP.
When I run the application, the bindTemp and bindVolt are not updated whenever new data values are received.
Am I missing something with how bind works? Can I do what I want to do with 'bind'. I basically want to run a separate thread to retrieve data and want my UI to be updated when the data changes.
Is there a better way to do this than the way I am trying to do it?
Thanks for any help in advance.
-Richard

Hi,
If you don't want to constantly poll for value change, you can use the observer design pattern, but you need to modify the classes that serve the values to javafx.
Heres a simple example:
The Thread which updates a value in every second:
// TimeServer.java
public class TimeServer extends Thread {
    private boolean interrupted = false;
    public ValueObject valueObject = new ValueObject();
    @Override
    public void run() {
        while (!interrupted) {
            try {
                valueObject.setValue(Long.toString(System.currentTimeMillis()));
                sleep(1000);
            } catch (InterruptedException ex) {
                interrupted = true;
}The ValueObject class which contains the values we want to bind in javafx:
// ValueObject.java
import java.util.Observable;
public class ValueObject extends Observable {
    private String value;
    public String getValue() {
        return this.value;
    public void setValue(String value) {
        this.value = value;
        fireNotify();
    private void fireNotify() {
        setChanged();
        notifyObservers();
}We also need an adapter class in JFX so we can use bind:
// ValueObjectAdapter.fx
import java.util.Observer;
import java.util.Observable;
public class ValueObjectAdapter extends Observer {
    public-read var value : String;
    public var valueObject : ValueObject
        on replace { valueObject.addObserver(this)}
    override function update(observable: Observable, arg: Object) {
         // We need to run every code in the JFX EDT
         // do not change if the update method can be called outside the Event Dispatch Thread!
         FX.deferAction(
             function(): Void {
                value = valueObject.getValue();
}And finally the main JFX code which displays the canging value:
// Main.fx
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.text.Text;
import javafx.scene.text.Font;
import threadbindfx.TimeServer;
var timeServer : TimeServer;
var valueObjectAdapter : ValueObjectAdapter = new ValueObjectAdapter();
timeServer = new TimeServer();
valueObjectAdapter.valueObject = timeServer.valueObject;
timeServer.start();
Stage {
    title: "Time Application"
    width: 250
    height: 80
    scene: Scene {
        content: Text {
            font : Font {
                size : 24
            x : 10, y : 30
            content: bind valueObjectAdapter.value;
}This approach uses less cpu time than constant polling, and changes aren't dependent on the polling interval.
However this cannot be applied to code which you cannot change obviously.
I hope this helps.

Looking for a better way to determine string variable from multiple options

Hi,
I trying to figure out a better way to determine a string variable from multiple options.
Say i have five pictures each with a different filename: img1 - img5...these file names could be named anything really but for this example i will keep them as img1, img2, img3, img4 and img5.
I want to display a messagebox with the string depending on what a certain variable is.
So for example, we have the number X, if X = 1 then i want the messagebox to show "img1" as the message
Essentially the way I have been doing it so far is:
Private Sub WhichImage()
Dim ImageName As String = ""
Dim i as integer
If i = 0 Then
ImageName = "img1"
End If
If i = 1 Then
ImageName = "img2"
End If
If i = 2 Then
ImageName = "img3"
End If
If i = 3 Then
ImageName = "img4"
End If
If i = 4 Then
ImageName = "img5"
End If
MessageBox.show(imagename, "Name of image", MsgBox.Style.OkOnly, MsgBoxResult.Ok)
end
Up until now, this has been fine, but what if I have 50 images, do I have to do this for all 50 images? or is there an easier way like putting the image names into a text file and have it read from the file depending on what the variable i equals? If so,
how do I go about this? Does each image name go on a separate line? can it just be separated by a comma instead? or is there a better way?
Please note that i know that i have declared "i" above in my code and not intialised it with anything, in reality "i" comes from somewhere else in the program so please ignore that part, it is not what I am concerned with.
Thanks
Mersec

Does each image name go on a separate line? can it just be separated by a comma instead? or is there a better way?
Arrays are useful for this.
Dim imagenames() As String = {"img1", "img2", "img3", "img4", "img5"}
Dim imagename As String = imagenames(i)
MessageBox.Show(imagename, "Name of image")
Any sort of collection will do instead of an array, and may be simpler to manage. There are many other options - the most suitable one probably depends on where the names originally come from. For instance, if you are getting them from a folder
using the FileSystem.GetFiles method, then they are already in a collection.
If the files names never change then you may as well include them in the program code, using something like the code above. If they can change, then you could use a text file, but that means you need a file update routine. If that is required
then the way you store the names will dictate how you access them.

Problem with return a ColdFusion query object from a Java class

Hi!
I need to return a ColdFusion query object from a Java class
using a JDBC result set ( java.sql.ResultSet);
I have tried to pass my JDBC result set in to the constructor
of the coldfusion.sql.QueryTable class with this code:
ColdFusion code
<cfset pra = createObject("java","QueryUtil").init()>
<cfset newQuery = CreateObject("java",
"coldfusion.sql.QueryTable")>
<cfset newQuery.init( pra.getColdFusionQuery () ) >
My java class execute a query to db and return QueryTable
Java code (QueryUtil.java)
import coldfusion.sql.QueryTable; // (CFusion.jar for class
QueryTable)
import com.allaire.cfx //(cfx.jar for class Query used from
QueryTable)
public class QueryUtil
public static coldfusion.sql.QueryTable
getColdFusionQuery(java.sql.ResultSet rs)
return new coldfusion.sql.QueryTable(rs);
but when i run cfm page and coldfusion server tries to
execute : "<cfset pra =
createObject("java","QueryUtil").init()>" this error appears:
Object Instantiation Exception.
An exception occurred when instantiating a java object. The
cause of this exception was that: coldfusion/sql/QueryTable.
If i try to execute QueryUtil.java with Eclipse all it works.
Also I have tried to return java.sql.ResultSet directly to
coldfusion.sql.QueryTable.init () with failure.
Do you know some other solution?

ok
i print all my code
pratica.java execute a query to db and return a querytable
java class
import java.util.*;
import java.sql.*;
import coldfusion.sql.*;
public class Pratica {
private HashMap my;
private String URI,LOGIN,PWD,DRIVER;
private Connection conn=null;
//funzione init
//riceve due strutture converite in hashmap
// globals
// dbprop
public Pratica(HashMap globals,HashMap dbprop) {
my = new HashMap();
my.put("GLOBALS",globals);
my.put("DBPROP",dbprop);
URI = "jdbc:sqlserver://it-bra-s0016;databaseName=nmobl";
LOGIN = "usr_dev";
PWD = "developer";
DRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
try{
// Carico il driver JDBC per la connessione con il database
MySQL
Class.forName(DRIVER);
/* Connessione alla base di dati */
conn=DriverManager.getConnection(URI,LOGIN,PWD);
if(conn!=null) System.out.println("Connection Successful!");
} catch (ClassNotFoundException e) {
// Could not find the database driver
System.out.print("\ndriver non trovato "+e.getMessage());
System.out.flush();
catch (SQLException e) {
// Could not connect to the database
System.out.print("\nConnessione fallita "+e.getMessage());
System.out.flush();
//funzione search
//riceve un hash map con i filtri di ricerca
public QueryTable search(/*HashMap arg*/) {
ResultSet rs=null;
Statement stmt=null;
QueryTable ret=null;
String query="SELECT * FROM TAN100pratiche";
try{
stmt = conn.createStatement();// Creo lo Statement per
l'esecuzione della query
rs=stmt.executeQuery(query);
// while (rs.next()) {
// System.out.println(rs.getString("descrizione"));
catch (Exception e) {
e.printStackTrace();
try {
ret = Pratica.RsToQueryTable(rs);
} catch (SQLException e) {
e.printStackTrace();
this.close();
return(ret);
// ret=this.RsToQuery(rs);
// this.close(); //chiude le connessioni,recordset e
statament
//retstruct CF vede HashMap come struct
//METODO DI TEST
public HashMap retstruct(){
return(my);
//conversione resultset to querytable
private static QueryTable RsToQueryTable(ResultSet rs)
throws SQLException{
return new QueryTable(rs);
//chiura resultset statament e connessione
private void close(){
try{
conn.close();
conn=null;
catch (Exception e) {
e.printStackTrace();
coldfusion code
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01
Transitional//EN">
<html>
<head>
<title>Test JDBC CFML Using CFScript</title>
</head>
<body>
<cftry>
<cfset glb_map =
createObject("java","java.util.HashMap")>
<cfset dbprop_map =
createObject("java","java.util.HashMap")>
<cfset glb_map.init(glb)> 
<cfset dbprop_map.init(glb["DBPROP"])>
<cfset pra =
createObject("java","Pratica").init(glb_map,dbprop_map)>
<cfset ourQuery
=createObject("java","coldfusion.sql.QueryTable").init(pra.search())>
<cfcatch>
<h2>Error - info below</h2>
<cfdump var="#cfcatch#"><cfabort>
</cfcatch>
</cftry>
<h2>Success - statement dumped below</h2>
<cfdump var="#ourQuery#">
</body>
</html>
error at line <cfset pra =
createObject("java","Pratica").init(glb_map,dbprop_map)>
An exception occurred when instantiating a java object. The
cause of this exception was that: coldfusion/sql/QueryTable.
-----------------------------------------------------------------------

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