How to use classes in other directory ?

Hi,
Sorry it's a total newbie question but i don't know how to do. I made a project, i have the main part of my classes in the root directory but i have somme classes in sub-directories , how can I use this classes , is there an equvalent of include in C ... ?

search the forums for classpath.

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How to use Vector or other ArrayList etc to store my JTree??

How to use Vector or other ArrayList etc to store my JTree??
Dear friends,
I have following I posted before, but not get satisfactory answer, so I modify and repost again here.
I have following code can add classes and students in the JTree,
in class Computer Science, it has student Bill Brien,
in Math, no,
Then I I add Student Nancy, Laura, Peter into Computer Science Class,
add AAAA, BBB, CCC into Math class,
I create a new class called Chemistry, then I add DDD int Chemistry;
so this JTree is dynamically changed,
[1]. How can I dynamically save my current JTree with all above tree structure and its nodes in a Vector or ArrayList(not sure which one is best)??
see code below:
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
public class ModelJTreeTest extends JFrame {
private JTree tree;
private DefaultTreeModel model;
private DefaultMutableTreeNode rootNode;
public ModelJTreeTest() {
    DefaultMutableTreeNode philosophersNode = getPhilosopherTree();
    model = new DefaultTreeModel(philosophersNode);
    tree = new JTree(model);
    JButton addButton = new JButton("Add Class/Students");
    addButton.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent event) {
        addPhilosopher();
    JButton removeButton = new JButton("Remove Selected Class/Students");
    removeButton.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent event) {
        removeSelectedPhilosopher();
    JPanel inputPanel = new JPanel();
    inputPanel.add(addButton);
    inputPanel.add(removeButton);
    Container container = getContentPane();
    container.add(new JScrollPane(tree), BorderLayout.CENTER);
    container.add(inputPanel, BorderLayout.NORTH);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setSize(400, 300);
    setVisible(true);
private void addPhilosopher() {
    DefaultMutableTreeNode parent = getSelectedNode();
    if (parent == null) {
      JOptionPane.showMessageDialog(ModelJTreeTest.this, "Select Class", "Error",
          JOptionPane.ERROR_MESSAGE);
      return;
    String name = JOptionPane.showInputDialog(ModelJTreeTest.this, "Add Class/Students:");
    model.insertNodeInto(new DefaultMutableTreeNode(name), parent, parent.getChildCount());
private void removeSelectedPhilosopher() {
    DefaultMutableTreeNode selectedNode = getSelectedNode();
    if (selectedNode != null)
      model.removeNodeFromParent(selectedNode);
private DefaultMutableTreeNode getSelectedNode() {
    return (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
private DefaultMutableTreeNode getPhilosopherTree() {
    DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode("Students");
    DefaultMutableTreeNode ancient = new DefaultMutableTreeNode("Computer Science");
    rootNode.add(ancient);
    ancient.add(new DefaultMutableTreeNode("Bill Brian"));
    DefaultMutableTreeNode math = new DefaultMutableTreeNode("Maths");
    rootNode.add(math);
    DefaultMutableTreeNode physics = new DefaultMutableTreeNode("Physics");
    rootNode.add(physics);
    return rootNode;
public static void main(String args[]) {
    new ModelJTreeTest();
}the actual Tree dynamically created somehow looks like following:
                         |            1.Peter
                         |---CS---    2. Nancy
                         |            3. Laura
                         |            4.Brian
                         |
Root(University): -------|---Math- 1.AAA
                         |            2.BBB
                         |            3.CCC
                         |
                         |
                         |---Chemistry- 1. DDDThanks a lot
Good weekends

you can't directly store a tree in a list.Ummm... Just to be contrary... Yes you CAN store a tree in a table.... In fact that's how the windows file system works.
Having said that... you would be well advised to investigate tree data-structures before resorting to flattening a tree into a list.
So... Do you have a specific requirement to produce a List? Your umming-and-erring about Vector vs ArrayList makes it sound like you're still at the stage of choosing a datastructure.
Cheers. Keith.

How to use the "split development directory structure" in JBuilder9 ?

How to use the "split development directory structure" in JBuilder9 ?
Have /APP-INF supported ?

I've not used JBuilder much, but if it has ant support, then it should
be pretty straight-forward.
-- Rob
Rick Ni wrote:
How to use the "split development directory structure" in JBuilder9 ?
Have /APP-INF supported ?

Need samples how to use classes in WebDynpro

Hi,
I Need To simple Samples how to use classes in WebDynpro.
Regards

Continued....
and in the model
right click->create model
select the radio button import java bean .
next ADD jars option will be seen
Browse the jar on the dekstop.
now add this model to the used models by right clicking on it.
Now if you go to Data Modeler.
You will find the used model.
From there map to the component controller->view Controller.
And continue with ur coding.
Hope this helps you.
Thanks & Regards,
Lokesh.

How to use classes of packages in flex mx:Script/ or mxml/

Hi.I am just learning Flex using Flex Builder 3 facing one problem,
Suppose I declare one package with name alert.as
package
import mx.controls.Alert;
public class alert
public function alertBtn()
Alert("Hello btn 1");
Now in want to use the function in mxml that I declared in a package.
<mx:Button label="btn1" click="alertBtn();" />
I have few questions
1)How to Import the class alert.as in <mx:Script> and where should i store the file alert.as in the directory folder of flex?
2)How to call the function alertBtn() when btn1 is clicked.
Thanks so much!
Regards
Ankur

Hi Greg.I think I was not able to clear my problem properly.Let me try this time again.
What I wanted to do was that in the below written code I have the full access of the id=panel1 in the script tag .This works properly.
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Script><![CDATA[
import flash.display.Sprite;
import mx.core.UIComponent;
private function addChildToPanel():void {
var circle:Sprite = new Sprite();
circle.graphics.beginFill(0xFFCC00);
circle.graphics.drawCircle(0, 0, 20);
var c:UIComponent = new UIComponent();
c.addChild(circle);
panel1.addChild(c);
]]></mx:Script>
<mx:Panel id="panel1" height="100" width="100"/>
<mx:Button id="myButton" label="Click Me" click="addChildToPanel();"/>
</mx:Application>
This above functionality when I tried to do using class Outside the code ,its not working !
Here is with the package:-
But suppose I make One package
package
import flash.display.Sprite;
import mx.core.UIComponent;
class getPanel extends Sprite
public function addChildToPanel():void {
var circle:Sprite = new Sprite();
circle.graphics.beginFill(0xFFCC00);
circle.graphics.drawCircle(0, 0, 20);
var c:UIComponent = new UIComponent();
c.addChild(circle);
panel1.addChild(c);
}//class
}//package
Now in MXML
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Script><![CDATA[
import getPanel;
]]></mx:Script>
<mx:Panel id="panel1" height="100" width="100"/>
<mx:Button id="myButton" label="Click Me" click="getPanel.addChildToPanel();"/>
</mx:Application>
So My problem is that this code doesnt do anything.
Neither the addChild function is working in it ,Nor the Panel1 is accessible here.
Can u pls help me here.
Thanks
Ankur

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).
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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
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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.

How to use Class "CL_GUI_CHART_ENGINE" in a abap program ?

Hi Guys,
I want to display data in my internal table in the form of a Graph using class "cl_gui_chart_engine".
I had a look at sample program given by SAP - GRAPHICS_GUI_CE_DEMO but need some help to understand how can we use our own data to be displayed in the graph ? Basically what I am looking for is that where we need to do the changes in creation of XML file so that we can pass our own data ?
( perform create_data_demo using l_ixml_data_doc)
Could you please help me with some sample code or pseudocode ?
Thanks
Ashwa

Thanks Kai,
I had already done the same thing and got the required output.
Populate X-Axis ( Categories )
LOOP AT ITAB.
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    l_element->if_ixml_node~set_value( itab-value).
ENDLOOP.
Populate Y-Axis ( Values )
LOOP AT VALUE_TAB.
   l_element = p_ixml_doc->create_simple_element(
             name = 'S' parent = l_series ).
    l_element->if_ixml_node~set_value( value_tab-value).
ENDLOOP.
I am now trying to find the ways to change the default layout of the graph. I guess it should be done in "perform create_custom_demo using l_ixml_custom_doc." . I want that my graph should be displayed as lines instead of bar's.
Once I achieve this I will share my findings along with sample code with the community.
I wish I could get some documentation on class "cl_gui_chart_engine" and interfaces like "if_ixml_document".
Thanks
Ashwani

How to use classes CL_DOCX_*

We have a need to use word 2007 OOXML classes all of which start with CL_DOCX*.
Basically what we are trying to do is take a DOCX files (File 1 & File 2) saved by MS WORD 2007 application and replace the header of File 1 with the header from File 2.
The basic functionality described above is working fine. However the same is not working when the header from File 2 has an IMAGE embedded in it.
We found several word 2007 OOXML classes in the system (all of which start with CL_DOCX*), but couldn't find usage for these classes anywhere in the system or SDN or OSS Notes etc.,
Just wondering whether anyone used these classes in their development environment and whether they can share this information here?
Any help in this regard is highly appreciated.
thanks,
-Sreenath

Which NetWeaver release are you using? The whole OOXML seems to be evolving within EhPs.
You'll find examples how to use the framework in the Unit Tests of class CL_DOCX_FORM - so have a look at those classes. For me those test code runs fine.
Best Regards,
Tobias

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I added a library to use classes already built.
In JBuilder7 I went to Tools | ConfigureLibraries
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to run it, the error messages say:
"MakeBox.java": Error #: 200 : <identifier> expected at line 8,
which is the line : public void MakeBox()
The entire code is :
package stan_e_makebox;
import objectdraw.*;
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void public MakeBox()
public void onMousePress(Location point)
new FilledRect(40,80,30,20,canvas);
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oo sorry,
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public MakeBox()

How to use classes in Actions tab

Hello guys!
I'm just a beginner so i'm sorry for my stupid question.I'm developing a game in which movie clips in our case people have their own schedule.I have multiple screens and so i want to be able to set their locations and make them invisible on other screens(rooms)they're not currently at.The trouble is i can't use variables from Actions in my class,neither can i use classes in my Actions.Can anyone tell me how to export classes into Actions code?
Here is my code:
var currentlocation;
var currentscreen;
if (person.currentlocation!==currentscreen){
person.visible=false;
btn.addEventListener(MouseEvent.CLICK, fl_MouseClickHandler);
function fl_MouseClickHandler(event:MouseEvent):void
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btn_2.addEventListener(MouseEvent.CLICK, fl_MouseClickHandler_2);
function fl_MouseClickHandler_2(event:MouseEvent):void
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Your problem/question is not clear to me. If you are getting errors you should include the error messages in your posting.
Could the problem arise from using a variable that is not defined?
currentroom = "playroom";
I do not see currentroom defined as a variable anywhere. There is a currentscene variable though.

Accessing class in other directory

how can i access and use class that is located in other folder??
for example my program is located in C:
and i want to use / access a class that is in C:\test\THECLASS.class
how can i refer to the THECLASS.class??

CLASSPATH
KBone's Mastering the Java Classpath http://www.kevinboone.com/classpath.html

How to use class in JSP file?

Hello All,
I am new to Jsp.
In Jsp file,I used class of myself.
Why,the Constractor seems not working?
Thanks in advance.

Hi,
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Use <% page import = "">
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How to use class.forName

I am trying to use Class.forName() from a string which is passed to me as argument.
Class batchClass = Class.forName(args[1]);
A jar file contains the class file for the string received above and I have this jar file in the manifest of my executable jar.
I get a class not found exception when I run my executable jar
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The jar file is in my classpath
run script
#!/bin/csh
java -jar -DDBPROVIDER=NO -DDBUS_ROOT=$DBUS_ROOT -DVTNAME=$VTNAME ./jar/IntraDayDepotPositionBatch.jar MagellanStart IntraDayDepotPositionBatch INPUTFILE LOGFILE
Exception
Magellan program starting - program class IntraDayDepotPositionBatch
Cannot find program class - IntraDayDepotPositionBatch
IntraDayDepotPositionBatch
java.lang.ClassNotFoundException: IntraDayDepotPositionBatch
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at com.db.mmrepo.app.IntraDayDepotPositionBatch.MagellanStart.main(Unknown Source)
Thanks for your time and feedback on this

actually i tried both...with package name and without package name..
nothing worked...
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How to use class for Translate..codepage/numer format

In the Unicode context, TRANSLATE... CODEPAGE/NUMBER FORMAT is not allowed.

this is the class to be used for TranslateCodepage/number format.statement
Unicode Error : In the Unicode context, TRANSLATE... CODEPAGE/NUMBER   FORMAT is not allowed.
Before Unicode
TRANSLATE T143T-TBTXT FROM CODE PAGE '1100' TO CODE PAGE '1105'.
After Unicode
   Use class for Translate codepage to codepage.
     Data : g_codepage LIKE tcp0c-charco VALUE '1100'.
CONSTANTS: c_unicodecp(4) VALUE '1105'.
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FORM translate_codepage USING    P_G_CODEPAGE
                                  P_C_UNICODECP
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DATA: l_fromcode TYPE cpcodepage.
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l_fromcode = P_G_CODEPAGE.
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      broken   = '.'
      use_f1   = 'X'
      outcode = l_tocode
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      invalid_codepage = 1
      internal_error   = 2.
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      WHEN 2.
        MESSAGE ID 'FES' TYPE 'E' NUMBER '024' RAISING unknown_error.
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      inbufflg       = 0
      outbufflg      = 0
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      outbuff        = l_out
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      internal_error = 1
      OTHERS         = 2.
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        MESSAGE ID 'FES' TYPE 'E' NUMBER '024' RAISING unknown_error.
      WHEN 2.
        MESSAGE ID 'FES' TYPE 'E' NUMBER '024' RAISING unknown_error.
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ENDIF.
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How to use .class with generics

Okay, in Java 5, Foo.class works just fine. But Map<Foo,Bar>.class does not. What is the right format?
I am trying to get a field value through reflection:
public static <T> T readFieldValueCastSave(
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   Class<T> fieldType)
               throws Exception{
          T r = null;
          Field f = getField(target.getClass(), fieldName);
          f.setAccessible(true);
          r = fieldType.cast(f.get(target));
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          return r;
}So this method works just fine for something like this:
class Foo {
   private Bar myBarField;
Bar b = readFieldValueCastSave(myFooObj, "myBarField", Bar.class);Now, what do I do in this case:
class Foo {
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List<Bar> l = readFieldValueCastSave(myFooObj, "myList", List<Bar>.class);List<Bar>.class simply does not compile.
Any suggestions ?

That's because List<Bar>.class doesn't exist. List.class exists, use that.

How to use classes in other directory ?

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