java-programmer >>Java is a third class language.

Java is a third class language.

Index ‹ java-programmer

Previous
- 2
 - RMI newbieI am tring to learn rmi and having some problems
 
 Why when I call getStockPrice on the client side does it print the starting
 value (1.34) and no the current value that prints out on the server side
 from the System.out.println statements?
 
 public class Stock
 {
 private String Name;
 private double value;
 
 Stock(String name, double val)
 {
 this.Name=name;
 this.value=val;
 }
 
 public double getvalue()
 {
 return value;
 }
 
 public void setvalue(double val)
 {
 this.value=val;
 }
 
 public String getname()
 {
 return Name;
 }
 }
 
 import java.util.*;
 import java.rmi.*;
 import java.rmi.registry.*;
 import java.net.MalformedURLException;
 
 public class StockClient
 {
 public static void main(String args[])
 {
 
 String name="A";
 try {
 StockInterface a = (StockInterface)
 Naming.lookup("rmi://localhost:41111/StockImpl");
 System.out.println("price of "+ name + " is " +
 a.getStockPrice(name));
 }
 catch (Exception re)
 {
 System.out.println(re);
 }
 }
 }
 
 import java.rmi.*;
 import java.util.*;
 import java.rmi.server.*;
 import java.net.MalformedURLException;
 
 public class StockImpl extends UnicastRemoteObject
 implements StockInterface
 {
 private ArrayList<Stock> list;
 public StockImpl() throws RemoteException
 {
 list=new ArrayList<Stock>();
 list.add(new Stock("A",1.34));
 list.add(new Stock("B",0.84));
 list.add(new Stock("C",5.04));
 list.add(new Stock("D",2.03));
 list.add(new Stock("E",5.00));
 list.add(new Stock("F",7.00));
 list.add(new Stock("G",11.34));
 list.add(new Stock("H",2.40));
 list.add(new Stock("I",8.21));
 list.add(new Stock("J",1.45));
 }
 
 public void sim()
 {
 Random rand =new Random();
 Stock temp;
 int abc=rand.nextInt(list.size());
 temp=list.get(abc);
 System.out.println(temp.getvalue() + " rand = "+abc);
 temp.setvalue(temp.getvalue()+rand.nextDouble());
 System.out.println(temp.getvalue());
 }
 
 public double getStockPrice(String Name) throws RemoteException
 {
 Stock temp;
 //System.out.println("List size "+list.size());
 //System.out.println("Name "+Name);
 for(int i=0;i<list.size();i++)
 {
 temp = list.get(i);
 if(Name.compareTo(temp.getname())==0)
 {
 return temp.getvalue();
 }
 }
 return -1.0;
 }
 
 public ArrayList<Stock> getlist()
 {
 return list;
 }
 
 public static void main(String args[])
 {
 //System.setSecurityManager(new RMISecurityManager());
 try {
 StockImpl server = new StockImpl();
 Naming.rebind("rmi://localhost:41111/StockImpl",server);
 System.out.println("Created and registered StockImpl object");
 StockImpl a= new StockImpl();
 while(true)
 {
 a.sim();
 try{ Thread.sleep(100); }
 catch(Exception e) { }
 System.out.println("Out "+a.getStockPrice("A"));
 }
 }
 catch (RemoteException re) { }
 catch (MalformedURLException me) { }
 }
 }
 
 import java.rmi.*;
 
 public interface StockInterface extends java.rmi.Remote
 {
 double getStockPrice(String Name) throws RemoteException;
 }
- 2
 - my JEditorPane.read() method is never referenced, why?[code]
 public class SimpleHTMLRenderableEditorPane extends JEditorPane {
 
 // borrowed from http://www.java2s.com/Code/Java/Swing-JFC/JEditorPaneandtheSwingHTMLPackage9.htm
 
 protected String getNewCharSet(ChangedCharSetException e) {
 String spec = e.getCharSetSpec();
 if (e.keyEqualsCharSet()) {
 // The event contains the new CharSet
 return spec;
 }
 
 // The event contains the content type
 // plus ";" plus qualifiers which may
 // contain a "charset" directive. First
 // remove the content type.
 int index = spec.indexOf(";");
 if (index != -1) {
 spec = spec.substring(index + 1);
 }
 
 // Force the string to lower case
 spec = spec.toLowerCase();
 
 StringTokenizer st = new StringTokenizer(spec, " \t=", true);
 boolean foundCharSet = false;
 boolean foundEquals = false;
 while (st.hasMoreTokens()) {
 String token = st.nextToken();
 if (token.equals(" ") || token.equals("\t")) {
 continue;
 }
 if (foundCharSet == false && foundEquals == false
 && token.equals("charset")) {
 foundCharSet = true;
 continue;
 } else if (foundEquals == false && token.equals("=")) {
 foundEquals = true;
 continue;
 } else if (foundEquals == true && foundCharSet == true) {
 return token;
 }
 
 // Not recognized
 foundCharSet = false;
 foundEquals = false;
 }
 
 // No charset found - return a guess
 return "8859_1";
 }
 
 public void read(InputStream in, Object desc) {
 System.out.println("do you see this?");
 try {
 super.read(in, desc);
 } catch (ChangedCharSetException e) {
 String charSet = getNewCharSet(e);
 System.out.println("charSet = " + charSet);
 try {
 in.reset();
 InputStreamReader reader = new InputStreamReader(in,
 charSet);
 super.read(reader, desc);
 } catch (ChangedCharSetException ee) {
 System.out.println("huh?");
 } catch (IOException ee) {}
 } catch (IOException e2) {}
 }
 
 }
 [/code]
 
 Per reference in http://kickjava.com/348.htm I am having to overwrite
 JEditorPane.read() with my own method, I still get
 ChangedCharSetException thrown when it should have been captured and
 you should have at least seen something in output, yet you see noting
 whatsoever except the ChangedCharSetException when you do this line:
 
 [code]
 // browser IS OF TYPE
 SimpleHTMLRenderableEditorPane
 
 browser.read(
 new BufferedReader(new
 StringReader(browser.cleanHTML(getURL()))),
 browser.getDocument()
 ); // SimpleHTMLRenderableEditorPane HAS
 METHOD cleanHTML(URL url) WHICH NEVER THROWS ChangedCharSetException
 [/code]
 
 Why is it that my method appears to never be referenced and the
 default read() method in JEditorPane is referenced instead? Ideas?
 
 Thanks
 Phil
- 4
 - Reverse Engineer UML Diagrams From Source CodeI'm looking for a good tool that can automatically generatre UML
 diagrams from source code.
 
 I know Together can do this, but it's rather expensive....
 
 I was hoping for something open source. What are my options? What
 should I be considering? I plan to use it mainly for personal use for
 building medium sized applciations.
 
 I also found this one:
 
 http://jrefactory.sourceforge.net/
 
 Has anyone used it?
 
 TIA,
 cpp
- 4
 - Write PNG from MemoryImageSourceI have an application which dynamically generates images using
 MemoryImageSource to produce a java.awt.Image object. I'd like to be
 able to write these images out as pngs.
 
 I've found the javax.imageio class which will write out pngs, but only
 from a BufferedImage and not from a basic Image. I've not been able to
 find a way to create a BufferedImage from an Image.
 
 Can anyone suggest how I can write out these images?
 
 Cheers
 
 Simon.
- 5
 - Jedit: Error about MouseWheelListenerI installed the same Jedit archive on Windows and on HP-UX (with
 JavaVM-1.3). On
 Windows, it runs fine. On Unix, I get the following error message on
 startup:
 
 java.lang.NoClassDefFoundError: java/awt/event/MouseWheelListener
 
 Could it be that something is missing in my CLASSPATH? Where is the
 MouseWheelListener
 supposed to be? I thought this class was added in 1.4, but note that
 the
 installation notes for JEdit say that it can run under Unix with Java
 1.3.
 
 Ronald
- 9
 - "no cmp field defined in cmp ejb"I'm so boring I know... this is my problem...
 
 I wrote the following entity bean, it rappresents something like this:
 
 primary key id (managed by the container)
 foreign key formulation_product (cmp relationship field)
 foreign key ingredient (cmp relationship field)
 
 public abstract class FormulationComponentBean implements EntityBean {
 
 /* Relationship field getters */
 public abstract FormulationProduct getFormulationProduct();
 public abstract Ingredient getIngredient();
 /* Relationship field setters */
 public abstract void setFormulationProduct(FormulationProduct product);
 public abstract void setIngredient(Ingredient ingredient);
 
 [...create methods and others ejb* methods...]
 
 }
 
 When I try to autogenerate database table with Sun Deploytool I get this
 error message: "no cmp field defined in cmp ejb".
 
 I really do not need any persistent field, but only relationship field...
 should I insert a fake persisten field just to satisfy that silly utility?
 Or I am wrong on something?
 
 Thanks a lot for any help...
- 11
 - window basis..Jep!
 
 I think i need a good tutorial here,
 would please receive few links, in need to get familiar with window opening,
 sizening and drawing images on it..
 
 Yours : JariTapio
 Homepage : www.EuroJari.net
 EMail : email***@***.com
- 14
 - Debugging an applet or JApplet in an IDE?Is it possible to debug an applet or JApplet in an IDE?
 
 How?
- 14
 - Drawing on TabsHi all - I have an application where my main frame has a tabbed interface,
 and each tab has a JPanel.
 
 I would like to draw a line graph on the second tab (the first tab is where
 data is entered) and a bar graph on the second tab.
 
 The problem I have is how to draw on the second or 3rd tabs.
 
 I googled and one solution was to subclass the JPanel and then override the
 paintComponent() method. I tried but it doesn't seem to work. I am probably
 just doing it wrong.
 
 How would I go about defining/extending the JPanel class? or is there some
 other container that would serve this purpose better?
 
 Any help is appreciated.
 
 (remove the +NOSPAM from my email address...)
- 15
 - Secure FTP API for Java ReleasedMyJavaWorld.com is pleased to announce the release of Secure FTP API
 for Java, an API that allows you to add secure file transfer
 capabilities to your Java applications. Some of the features of Secure
 FTP API for Java are:
 
 Complete implementation of the File Transfer Protocol as defined RFC
 959
 
 Support for secure file transfer using SSL/TLS as defined in RFC 2228.
 Both Explicit and Implicit SSL connections are supported.
 
 Extendable architecture to support legacy/non-standard FTP servers
 
 Event notification to notify the connection and transfer evens to
 interested objects.
 
 Support for active and passive data transfers
 
 Support for ASCII and Binary data types
 
 Set the time outs and buffer size to use for the control and data
 connections
 
 And many more...
 
 Check it out at http://www.myjavaworld.com
 
 Regards
 Sai Pullabhotla
- 15
 - casinos/lasvegas<HTML>
 <HEAD>
 <META NAME="GENERATOR" Content="Microsoft DHTML Editing Control">
 <TITLE></TITLE>
 </HEAD>
 <BODY>
 Las Vegas / Casino domains for sale in <A
 href="http://www.supernet.biz">www.supernet.biz</A> !!!
 ****************************************************
 casinos.com.lv (Casinos Com "Las Vegas")
 slots.lv (Slots "Las Vegas")
 bet.com.lv (Bet Com "Las Vegas")
 nevada.com.lv (Nevada Com "Las Vegas") 
 poker.com.lv (Poker Com "Las Vegas")
 roulette.com.lv (Roulette Com "Las Vegas")
 gambling.com.lv (Gambling Com "Las Vegas")
 blackjack.com.lv (BlackJack Com "Las Vegas")
 jackpot.com.lv (Jackpot Com "Las Vegas")
 videopoker.lv (VideoPoker "Las Vegas")
 videopoker.com.lv (VideoPoker Com "Las Vegas")
 resort.lv (Resort "Las Vegas")
 cash.lv (Cash "Las Vegas")
 
 for details or for MORE domains go to: <A
 href="http://www.supernet.biz">www.supernet.biz</A> 
 
 
 </BODY>
 </HTML>
- 15
 - Unexpected Signal : 11 occurred at PC=0x2845BB2FHi ,
 
 Just reporting this core dump from my web application
 
 Regards
 
 Samuel Jackson
 
 ----------------------------------------------
 
 root@ds226# more hs_err_pid77432.log
 
 Unexpected Signal : 11 occurred at PC=3D0x2845BB2F
 Function=3Dfollow_stack__9MarkSweep+0x3F
 Library=3D/jdk1.4.2/jre/lib/i386/client/libjvm.so
 
 Dynamic libraries:
 0x8048000 /usr/local/jdk1.4.2/bin/java
 0x2806c000 /usr/local/lib/libc_r.so.4
 0x28123000 /jdk1.4.2/jre/lib/i386/client/libjvm.so
 0x2866a000 /usr/local/lib/libstdc++.so.3
 0x286af000 /usr/local/lib/libm.so.2
 0x286ca000 /jdk1.4.2/jre/lib/i386/native_threads/libhpi.so
 0x286d8000 /jdk1.4.2/jre/lib/i386/libverify.so
 0x286f3000 /jdk1.4.2/jre/lib/i386/libjava.so
 0x28714000 /jdk1.4.2/jre/lib/i386/libzip.so
 0x34fb2000 /jdk1.4.2/jre/lib/i386/libnet.so
 0x2804e000 /usr/libexec/ld-elf.so.1
 
 Heap at VM Abort:
 Heap
 def new generation total 2304K, used 256K [0x2c5b0000, 0x2c830000, =
 0x2ca90000)
 eden space 2048K, 0% used [0x2c5b0000, 0x2c5b0000, 0x2c7b0000)
 from space 256K, 100% used [0x2c7f0000, 0x2c830000, 0x2c830000)
 to space 256K, 0% used [0x2c7b0000, 0x2c7b0000, 0x2c7f0000)
 tenured generation total 31080K, used 30993K [0x2ca90000, 0x2e8ea000, =
 0x305b0000)
 the space 31080K, 99% used [0x2ca90000, 0x2e8d4488, 0x2e8d4600, =
 0x2e8ea000)
 compacting perm gen total 14336K, used 14218K [0x305b0000, 0x313b0000, =
 0x345b0000)
 the space 14336K, 99% used [0x305b0000, 0x31392af8, 0x31392c00, =
 0x313b0000)
 
 Local Time =3D Sat Nov 27 13:30:41 2004
 Elapsed Time =3D 63665
 #
 # HotSpot Virtual Machine Error : 11
 # Error ID : 4F530E43505002F1
 # Please report this error to
 # email***@***.com mailing list
 #
 # Java VM: Java HotSpot(TM) Client VM (1.4.2-p6-root_19_aug_2004_10_42 =
 mixed mode)
 #
 _______________________________________________
 email***@***.com mailing list
 http://lists.freebsd.org/mailman/listinfo/freebsd-java
 To unsubscribe, send any mail to "email***@***.com"
- 16
 - .Net: 3 Years of the 'Vision' Thingasj wrote:
 > Ben wrote:
 >>
 >> Here here!
 >
 >
 > i believe that's "hear! hear!"
 >
 > and i ask again:
 >
 > "really? so where are most of the c#/.net people coming from? what
 > with all the questions from vb and other microsoft developers around
 > here, sure sounds like a mass migration of the herd from vb and other
 > older microsoft tech to c# and other .net.....and that sounds like
 > pure cannibalism of old by the new to me."
 
 I think you're clutching at straws here, so what if people using dotnet were
 using VB6 or C++ in the past to do development?
- 16
 - Preventing URLConnection from buffering entire output streamIn my client application, I upload huge files via HTTP.
 The URLConnection class seems to automatically buffer
 the entire contents, then when the OutputStream associated with
 the URLConnection is closed, it computes the length
 and prepends a Content-Length header before actually sending
 any bytes to the web server.
 
 This results in an OutOfMemoryException when the file is huge.
 
 My application uses Transfer-Encoding: chunked, but
 that doesn't help when the entire stream gets buffered anyway.
 
 Is there a way around this without writing my own URLConnection
 clone based on Sockets? Calling flush() on the OutputStream
 seems to have no effect.
 
 I understand that a workaround would be to use the new features
 of Java 1.5, but that's too new to expect end users to have.
 
 Any help would be appreciated.
 
 Thanks!
 
 Mark Riordan
 
 Note: email address in header, email***@***.com, must have
 "NoSpam" removed.
- 16
 - extends DefaultTableModel ???Hi
 I have an exception of the line "return content.size();" in
 getRowCount(), it said the vector content is null. But if i extends
 the AbstractTableModel rather than DefaultTableModel, no exception,
 please tell me why?
 
 thanks
 from Peter
 
 public class MyTableModel extends DefaultTableModel {
 String columnNames[] = {"1", "2", "3", "4", "5"};
 Vector content=new Vector();
 
 public MyTableModel() {
 }
 
 public int getColumnCount() {
 return columnNames.length;
 }
 
 public String getColumnName(int col) {
 return columnNames[col];
 }
 
 public Object getValueAt(int row, int column) {
 "Peter"
 }
 
 public int getRowCount() {
 return content.size();
 }
 
 }

Author

Message

Jeff Relf

Posted: 2004-6-17 2:36:00

Top

java-programmer, Java is a third class language. Hi Mark Thornton,

Re: Windows' GDI for easily writing to any raster device
using essentially the same code,
regardless of the printer or the screen.

You asserted,
" Not only does it work well ( in Java )
it also supports some features ( e.g. anti-aliasing )
which may not be available on the OS. "

Even if that were true ( and I highly doubt it ),
Java still couldn't do it with out the OS.

Java Overlays an OS, it doesn't replace it.

Java is a third class language.
No one would use it if they didn't have other options.

Satan's Evil Twin

Posted: 2004-6-17 3:06:00

Top

java-programmer >> Java is a third class language.

> Java is a third class language.
> No one would use it if they didn't have other options.
>

IOW, one would only use java if one had the option of using other languages?
Gee, that explains it!!

Mark Thornton

Posted: 2004-6-17 3:37:00

Top

java-programmer >> Java is a third class language. Jeff Relf wrote:

> Hi Mark Thornton,
>
> Re: Windows' GDI for easily writing to any raster device
> using essentially the same code,
> regardless of the printer or the screen.
>
> You asserted,
> " Not only does it work well ( in Java )
> it also supports some features ( e.g. anti-aliasing )
> which may not be available on the OS. "
>
> Even if that were true ( and I highly doubt it ),
> Java still couldn't do it with out the OS.
>
> Java Overlays an OS, it doesn't replace it.
>
> Java is a third class language.
> No one would use it if they didn't have other options.
>

What may I ask are your qualifications for making these unsubstantiated
assertions? You do not appear to have any experience with the language
at all. I have been using Java for over seven years and know its
strengths and weaknesses very well.

Mark Thornton

Index ‹ java-programmer

Next
- 1
 - Controlling XML elements orderHi I'm returning an XML to my clients (SOAP). Now I want to order the
 items in my XML (I dont want my clients to sort it) is there any API
 in DOM that I can use for sorting the elements some way ? or simply
 preserving the sort order of that that I added items to the DOM tree?
 (I'm adding the items in a sorted way however when I look at the XML
 generated its not sorted)
- 2
 - ResourceBundle with Database BackendHi all,
 
 We're busy creating a web application that needs different localization.
 ResourceBundles would probably be the best thing to use for this. However,
 we would like to use a database as the backend for the ResourceBundle.
 This would make changing and adding translated strings much easier. We
 would like our client to be able to do this himself, using a front end we
 will write.
 
 From what I understand of ResourceBundles, we would have to create a
 ResourceBundle class for each translation. We'd like to create just one
 subclass of ResourceBundle however, which handles all translations. Is
 this possible? I can't find any examples of how this should work..
 
 thanks for thinking along, please tell me if my question isn't completely
 clear or something like that,
 
 Ilja Booij
 MMS2P B.V.
- 3
 - Exception NumberFormatException when creating an instance of JFileChooserHi,
 
 I getting a NumberFormatException executing the following code:
 
 JFileChooser fc = new JFileChooser();
 
 The following line is called in my code in
 ...
 ReadFileFrame.<init>() line: 23
 ...
 
 Yes, it is simple JFileChooser instance... I'm using JDK 1_5, Swing in
 a XP Pro machine and the only thing that I can remember that have been
 changed in my environment was a Windows Update.
 
 Based in the stack, I believe that something is broken in the way that
 Java is getting some Windows UI data.
 
 The stack:
 
 Thread [AWT-EventQueue-0] (Suspended (exception NumberFormatException))
 Integer.parseInt(String, int) line: 447
 Integer.parseInt(String) line: 497
 Win32ShellFolderManager2.get(String) line: 234
 ShellFolder.get(String) line: 221
 WindowsLookAndFeel$LazyWindowsIcon.createValue(UIDefaults) line: 1876
 UIDefaults.getFromHashtable(Object) line: 183
 UIDefaults.get(Object) line: 128
 MultiUIDefaults.get(Object) line: 44
 MultiUIDefaults(UIDefaults).getIcon(Object) line: 409
 UIManager.getIcon(Object) line: 613
 WindowsFileChooserUI(BasicFileChooserUI).installIcons(JFileChooser)
 line: 237
 WindowsFileChooserUI(BasicFileChooserUI).installDefaults(JFileChooser)
 line: 219
 WindowsFileChooserUI(BasicFileChooserUI).installUI(JComponent) line:
 135
 WindowsFileChooserUI.installUI(JComponent) line: 140
 JFileChooser(JComponent).setUI(ComponentUI) line: 650
 JFileChooser.updateUI() line: 1755
 JFileChooser.setup(FileSystemView) line: 366
 JFileChooser.<init>(File, FileSystemView) line: 332
 JFileChooser.<init>() line: 285
 ReadFileFrame.<init>() line: 23
 DecAid.readFile() line: 1086
 DecAid.access$1(DecAid) line: 1059
 DecAid$ActionListenerAdapter.actionPerformed(ActionEvent) line: 2532
 JMenuItem(AbstractButton).fireActionPerformed(ActionEvent) line: 1849
 AbstractButton$Handler.actionPerformed(ActionEvent) line: 2169
 DefaultButtonModel.fireActionPerformed(ActionEvent) line: 420
 DefaultButtonModel.setPressed(boolean) line: 258
 JMenuItem(AbstractButton).doClick(int) line: 302
 WindowsMenuItemUI(BasicMenuItemUI).doClick(MenuSelectionManager) line:
 1000
 BasicMenuItemUI$Handler.mouseReleased(MouseEvent) line: 1041
 JMenuItem(Component).processMouseEvent(MouseEvent) line: 5488
 JMenuItem(JComponent).processMouseEvent(MouseEvent) line: 3093
 JMenuItem(Component).processEvent(AWTEvent) line: 5253
 JMenuItem(Container).processEvent(AWTEvent) line: 1966
 JMenuItem(Component).dispatchEventImpl(AWTEvent) line: 3955
 JMenuItem(Container).dispatchEventImpl(AWTEvent) line: 2024
 JMenuItem(Component).dispatchEvent(AWTEvent) line: 3803
 LightweightDispatcher.retargetMouseEvent(Component, int, MouseEvent)
 line: 4212
 LightweightDispatcher.processMouseEvent(MouseEvent) line: 3892
 LightweightDispatcher.dispatchEvent(AWTEvent) line: 3822
 JFrame(Container).dispatchEventImpl(AWTEvent) line: 2010
 JFrame(Window).dispatchEventImpl(AWTEvent) line: 1766
 JFrame(Component).dispatchEvent(AWTEvent) line: 3803
 EventQueue.dispatchEvent(AWTEvent) line: 463
 EventDispatchThread.pumpOneEventForHierarchy(int, Component) line: 234
 EventDispatchThread.pumpEventsForHierarchy(int, Conditional,
 Component) line: 163
 EventDispatchThread.pumpEvents(int, Conditional) line: 157
 EventDispatchThread.pumpEvents(Conditional) line: 149
 EventDispatchThread.run() line: 110
- 4
 - Problem was javax.comm.ParallelPort 's getOutputStream() -ed objects write() method. HERE goes ANSWERTo all, who tryed to send tada to Parallel port using javax.comm api.
 I had the same problem at home when I wrote program.
 Then I went to my working place and tested my program, - the problem
 remained - program hanged forever after sending bytes to parallel port.
 I had tryed almost everything at home, so the way could be only one -
 PRINTER and SO THAT WAS ENDEED!!!
 I turned printer on and bytes went away :) program worked fine!
 
 So, as we could see Windows platforms (and maybe others too) block all
 outgoing signals to the ports from where OS does not get or receive the
 signal that means the port is alive (=something is connected to that
 port).
 
 That was one more good lesson for me.
 
 If this helped somebody, let me know.
 Tengo
 ----------
 Who is looking for something, that will find it.
- 5
 - [?] Struts looses authenticate informations ?Hi,
 
 I'm trying to make my first struts application and I'm fighting with
 authentication and roles.
 
 I've only one jsp page (index.jsp) that prints authentication type ("BASIC")
 and user roles.
 <%
 authentication+="Authentication " + request.getAuthType();
 
 if (request.isUserInRole("ADMIN")) { role += "ADMIN; " ; }
 if (request.isUserInRole("USER")) { role += "USER; " ; }
 %>
 ----------------------------------------------------
 <%= authentication %>
 <%= "ROLES : " + role %>
 ----------------------------------------------------
 
 
 Then there's an empty form with a "submit" button.
 
 <html:form action="/index">
 <html:submit value="SUBMIT" />
 </html:form>
 
 the execute method in action is the following :
 
 public ActionForward execute(
 ActionMapping mapping,
 ActionForm form,
 HttpServletRequest request,
 HttpServletResponse response) throws Exception {
 
 String forward = "index";
 return mapping.findForward(forward);
 }
 
 When I enter my application the first time it shows exactly authentication
 BASIC and ROLES : ADMIN
 but when I press "submit" it shows "authentication NULL" and "ROLES : "
 
 I'm using tomcat 4.1.18 (I also tried .24 and .27 !) and struts 1.1
 
 WHERE' S THE ERROR ??
 
 Thanks
 
 ---
- 6
 - deploying multiple instances of same application (.war file) on tomcat 5.5We have a web application running on tomcat 5.5 that works fine when
 deployed independently. However, we would like to deploy multiple
 instances of the same application on the same server. We have built a
 new war file of the same application with a different name including a
 new context file for the application. This new war file also runs fine
 independently but, when deployed along with the original application,
 generates a Java Heap Space error.
 
 Is there a special way to deploy multiple instances of the same
 application on the same server using Tomcat?
 
 Please help us! Thank you!!!
- 7
 - Immutable text area idiom?Andrew Thompson wrote:
 > (sighs) You can lead a horse to water.. ;-)
 
 (I lied.)
 
 Look, I understand your points, and they are good ones. Boiled down,
 they are essentially "Don't try to outsmart the look and feel; it knows
 what it's doing." With this I agree entirely.
 
 This is not a look and feel issue, however. I don't have a problem with
 the way that a given component is being rendered in a particular look
 and feel. I don't have a problem with look and feel implementations
 period. I have a problem with exactly what components I should use to
 represent particular information.
 
 I have never seen a property sheet that displays information about a
 live object somewhere that uses /disabled/ components to show "enabled"
 information. Non-editable components? Sure. But that's different. If
 a component is disabled, that means you aren't really supposed to look
 at it, or it is not applicable in some other way. Those are NOT the
 semantics I wish my UI in this case to convey. I wish simply to convey
 that X is the current value for property Y, and nothing else.
 
 Again, I thank you for your obviously hard work on this subject.
 
 Cheers,
 Laird
- 8
 - what did i install wrong?Ive been working on a space invaders game at school, i took it home today,
 and tried installing jcreator, upon execution of my game class i got this
 error.
 
 http://www.geocities.com/xpirimint/cs3/error.JPG
 
 any help would be apreciated
- 9
 - Does Anybody know how to clone DefaultMutableTreeNodeHello,
 
 I have a smoll problem in cloning (deep) DefaultMutableTreeNode. After
 clone() there is only one node without children. How to clone whole tree?
 
 BSP
- 10
 - annoying eclipse automatisms (resource copying)I really like Eclipse as Java editing platform, but now I want to do
 the following:
 
 I have a directory with not only self-written Java sources but also
 some non-Java source files (namely parser/lexer constructed in
 CUP/JLex). From this, I generate Java sources which land in the same
 directory. Now when I build this directory from Eclipse it persists in
 copying my non-Java sources to the output directory. While this
 doesn't exactly cause any malfunction, it does disturb my cleanly
 nature ;)
 
 What options would you suggest to keep the structure clean? I think
 setting up yet another directory for the CUP/JLex sources would be
 rather impractical.
 
 Thanks,
 Justin
- 11
 - Using JMF to build rtsp serverHi, I'd like to know if it's possible to create a server application
 that transmits a .rm file through rtsp. I've seen some examples using
 AVI and other standard formats, but I'm not sure if this is possible.
 Basically what I need is a server which waits for connections and
 transmit a .rm file to it. Of course I could use Helix, but I need
 something for free. In any case, is there any free alternative?
 
 TIA.
- 12
 - MIDP 1.0: Filled rectanglesHello!
 
 I'm beginning to develop a 3D game for J2ME mobile phones. The obvious
 problem is, how to draw filled triangles. I know that in MIDP 2.0 this
 can be done easily, and Nokia has an extension to MIDP 1.0 which
 allows to draw filled polygons. Now the problem is how to do it in
 plain MIDP 1.0 (say, on a Motorola T720 or SonyEricsson T610). I
 thought of two solutions:
 
 * Use two or three fillArc() invocations. Each of them would paint an
 arc which has a center in one triangle vertex. The arcs can be scaled
 so that they cover the whole triangle and never paint outside the
 triangle. Or perhaps even one arc can be used which approximates the
 triangle well, especially when it's small.
 
 * Divide the triangle into horizontal and vertical lines and draw them
 using drawLine().
 
 The second method requires (or at least appears to require) more code,
 and uses much more drawing operations than the first, so it seems to
 be slower. But on the other hands, perhaps scaling the arc and
 painting it would be much time-consuming?
 
 If you have any experience or insight about this problem, I'd be very
 grateful.
 
 Regards,
 Michau.
- 13
 - Help needed, rotation behaviors with java3DHi, I've been trying for weeks to solve a problem, hope someone out
 there can assist me. I am a beginner with java3d.
 Problem:
 How do i attach a flat cylinder (line) between two spheres, whilest
 both spheres are rotating around thier own axis and orbiting
 (rotating) around the center of the universe with different rotation
 (alpha)interval?
 Pls. all suggestions are welcome. Time is runing out and i'm about to
 miss my deadline./Sheena
- 14
 - pasting images from excel with transparency have a black backgroundHi There,
 
 I've searched on this topic, but have only found an unanswered post
 from 2003. Basically, if I copy a chart from excel (well, from a
 number of vector based packages it seems) that has transparency, the
 resulting image in java has had the transparency replaced with black.
 
 However, if you paste the chart into word, select it and then copy it,
 it will paste into java with no problems.
 
 I've searched the java bug database, but have had not luck.
 
 To repeat this, simply create a chart in excel, set it's background to
 fill:none and copy the chart. Then run the class below and press the
 button.
 
 I am running Office 2002 and using Sun JDK 1.5.07
 
 Any help much appreciated on this as it's driving me nuts.
 
 Thanks,
 Brian
 
 =============================================================
 import java.awt.*;
 import java.awt.datatransfer.*;
 import java.awt.event.*;
 
 import javax.swing.*;
 
 public class ClipboardTest
 {
 public static void main(String[] args)
 {
 try
 {
 JFrame frame = new JFrame();
 frame.setLayout(new BorderLayout());
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
 final JLabel label = new JLabel();
 label.setPreferredSize(new Dimension(200, 200));
 frame.add(label, BorderLayout.CENTER);
 JButton button = new JButton("Get Clipboard");
 button.addActionListener(new ActionListener()
 {
 public void actionPerformed(ActionEvent e)
 {
 try
 {
 Transferable xfer =
 Toolkit.getDefaultToolkit().getSystemClipboard().getContents(null);
 label.setIcon(new
 ImageIcon((Image)xfer.getTransferData(DataFlavor.imageFlavor)));
 }
 catch (Exception ex) {}
 }
 });
 frame.add(button, BorderLayout.SOUTH);
 frame.pack();
 frame.setVisible(true);
 }
 catch (Exception e){}
 }
 }
- 15
 - newbie question: processing large database in chunks?
 Hi,
 
 When I
 select * from XX
 I'm geting an OutOfMemoryError. I'm using JDBC with Mysql,
 and calls like:
 
 ResultSet rs = dbc.executeQuery("select * from thetable");
 
 My beginner's question: what's the right way to read and process the
 table in chunks, to avoid running out of memory?
 
 Is using LIMIT n1,n2 inside the query the right thing to do, giving
 e.g. LIMIT 1,100 followed by another query using LIMIT 101,200, etc?
 Is there a more efficient way?
 
 I guess I'm surprised that it's even necessary. I would have thought
 that the data would stay on the server until pulled to the client
 by resultset.next() and a resultset.getXX(). But evidently
 the whole table is being sent to the client??