java-programmer >>Applets and J2SE 5.0

Applets and J2SE 5.0 - problems?

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- 2
  - File upload with JSF.....Hi,
    i'm a new user of java. I have a question. I have to develop a JSF
    application that make user able to:
    
    1) Upload a txt file
    2) Showing to user columns and rows numbers of file.
    
    For this second operation i'have developed a java application that
    receive a txt file from a BufferedReader and counts rows and columns
    number.
    My questions are:
    
    1) How can i realize file upload with JSF?
    2) In which format a file is uploaded?
    3) Can i use my java application for counting rows and columns number
    of file?
    
    Can you help me?Please use easy concepts because i'm inexpert.....
- 2
  - type safety in java 1.5 (bug or hole?)"John C. Bollinger" <email***@***.com> schrieb im Newsbeitrag
    news:c8g89n$esu$email***@***.com...
    
    > It would all the same be a nice complement to generics if the 1.5
    > compiler would indeed issue warnings about user-inserted casts that are
    > not provably correct. (I.e. those that the compiler cannot simply
    > ignore). That would give Bracha's comment (that started this confusion)
    > broad enough scope to no longer be confusing.
    
    I agree very much.
    
    BTW, there's another comment from Bracha in the very same paper that's
    confusing (me): He says "The Java virtual machine does not directly support
    overriding of methods with different return types. This feature is supported
    by the compiler.". What does this mean? Does this mean that the different
    return types are gone at run time? Here's an example:
    
    static class A {
    static A create() { return new A(); }
    public A m(A a) { System.out.println("A->A"); return a; }
    }
    
    static class B extends A {
    static B create() { return new B(); }
    public B m(A a) { System.out.println("A->B"); return (B) a; }
    public B m(B b) { System.out.println("B->B"); return b; }
    }
    
    public void testOverriding() {
    A a_a = A.create(); // static type A, dynamic type A
    A a_b = B.create(); // static type A, dynamic type B
    B b_b = B.create(); // static type B, dynamic type B
    
    A a2 = a_a.m(a_b); // prints: A->A
    A a3 = a_a.m(b_b); // prints: A->A
    
    A a5 = a_b.m(a_b); // prints: A->B <== overriding works
    A a6 = a_b.m(b_b); // prints: A->B <== overriding works
    
    B b2 = b_b.m(a_b); // prints: A->B
    B b3 = b_b.m(b_b); // prints: B->B
    }
    
    public void testReflection() {
    try {
    System.out.println(
    B.class.getMethod("m", new Class[] {A.class}).getReturnType()
    == B.class
    ); // prints: true <== reflection works, too
    }
    catch (Throwable t) {
    throw new RuntimeException("Laufzeitfehler", t);
    }
    }
    
    So there's obviously some runtime support for overriding methods with a
    different return type, because in this example both the overriding and the
    reflection worked. Then what did Bracha mean?
    
    2004-05-24, York.
    --
    werres at uni minus bremen.de
    http://www.uni-bremen.de/~werres
- 5
  - DB Selection - J2MEHi,
    
    I am developing an application for PDAs using IBMs
    VM (J9). Now my problem is, that I want to store
    data on the device. Well, I am using J2ME with
    Personal Profile to do this, so file support is
    present in this configuration. Now I wonder if
    there exist solutions to store data and easily
    retrieve it. (commercial, free, open source)
    
    I have to store data on the device, add new
    data often, update and delete old data sometimes.
    
    1. So how do you store data, when not having present
    a complete RDBMS?
    2. There are RDBMS for this platform too.
    Any experiences using them?
    (for example Pointbase)
    3 There is this JDO Option (for example
    with ObjectDB) is this working well?
    4. What do you think of the following options,
    which I already found, but have no idea
    whether they will work?
    
    I alread checked:
    -JDMB (rather minimalistic, only key/value pairs to be saved)
    -JISP (produces rather big files -> not suitable for
    constrained devices?)
    -HSQL (Anybody got that to work within the mentioned configuration?
    I think mainly the java.sql.* classes are missing in the
    personal profile)
    -ObjectDB (OODB with JDO, no idea exactly if this will
    work for my purposes)
    
    Any help will be appreciated
    Rene
- 5
  - checkbox ploblem pls help!!i was new in java and i now completed add the checkbox in each node but the
    ploblem is i cant click the check box..
    what should i do in next step... pls help me thank you..
    following is my code
    
    fileTree.setCellRenderer(new DefaultTreeCellRenderer()
    {
    public Component getTreeCellRendererComponent(JTree tree, Object
    value,
    boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus)
    {
    super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf,
    row, hasFocus);
    JCheckBox chk = new JCheckBox();
    chk.setContentAreaFilled(false);
    chk.setEnabled(true);
    //
    chk.setBorderPaintedFlat(true);
    chk.setOpaque(false);
    
    JPanel jPanel = new JPanel(new BorderLayout());
    jPanel.add(chk, BorderLayout.WEST);
    jPanel.add(this, BorderLayout.EAST);
    return jPanel;
    }
    
    --
    Message posted via http://www.javakb.com
- 5
  - How to control the cursor positon of java program in console mode?I am writing a small database that requires user input.
    
    However, whenever something is output to the screen, the cursor stays at the
    beginning of the output instead of the end of the output.
    
    How can I let it go to the end of the output?
    
    For example:
    
    say, the output is like this:
    
    This is a database. Please input your information below.
    prompt:>
    
    I want the cursor to go to after the ">" sign but it stays in front of
    "this" although whenever the user presses the keyboard it goes the end after
    ">".
    
    This is not a big problem but makes my application look not so professional.
    
    Anyway to cure this?
    
    John
- 8
  - newbie: Global EJB and more ...
    Hi group,
    
    While thinking of how to transfer a tranditional client-server app
    into J2EE, I got following two questions:
    
    1, In a typical application, there should be some global (even
    singleton) objects which are created on application startup code and
    stay there until the program exiting. In the idiom of J2EE, what kind
    of Beans act like this kind of global object? And, when and how these
    global beans should be created?
    
    2, I knew Beans have to be deployed onto the server before they come
    to be available, but those Beans quit often need some objects to
    complete its job, these objects may encapsulate a algorithem, may do
    some management task, but they typically dont have to exposed to
    client tire or web tire. I call these objects are intermediate
    objects. My question is, should this kind of objects need to be a EJB?
    My J2EE books seems only to mention three kinds of Beans,
    SessionBeans, EntityBeans and MessageBeans. But what do I do for those
    intermediate objects?
    
    Thanks in advance.
    
    --
    email***@***.com
    
    %% (fortunes)
    Q: How did you get into artificial intelligence?
    A: Seemed logical -- I didn't have any real intelligence.
- 8
  - 'back engineering' java appletshi,
    
    is it possible to gain access to java code by a user using an applet over
    the web? i know with some scripting languages like PHP or javascript then
    users can view the code and 'back engineer' it to discover how it works etc.
    
    is this possible with java?
    
    thanks
- 8
  - using parameterized ArrayListI am trying to read write <Event> objects to an ArrayList ... but when
    I try to convert the arraylist back to the object arrayit gives me a
    ClassCastException for the line
    
    return (Event[]) a.toArray();
    
    --------------------------------------
    BufferedReader ois = null;
    ArrayList<Event> a = new ArrayList<Event>();
    try {
    
    ois = new BufferedReader(new FileReader(this.calFile));
    
    Event e = null;
    String line;
    
    while ((line = ois.readLine()) != null) {
    e = new Event(line);
    a.add(e);
    }
    ois.close();
    } catch (FileNotFoundException e) {
    
    e.printStackTrace();
    } catch (IOException e) {
    
    e.printStackTrace();
    } catch (ParseException e) {
    
    e.printStackTrace();
    } catch (InvalidTimeRangeException e) {
    
    e.printStackTrace();
    }
    if (a.isEmpty())
    return null;
    return (Event[]) a.toArray();
- 9
  - gui builder for javaHi,
    
    I just started programming java and I am looking for a free gui builder for
    java on linux or windows platforms. Where can I find it.
    
    thanks
    
    Johan
- 10
  - butting components right up against each otherOn Fri, 27 Jun 2003 13:29:59 GMT, Roedy Green <email***@***.com> wrote:
    
    > On Fri, 27 Jun 2003 14:06:22 +0100, Daniel Dyer
    > <email***@***.com> wrote or quoted :
    >
    >> Sorry, I didn't mean ipadx/ipady, that won't help. You certainly
    >> shouldn't need to use absolute positioning though. Do you have any
    >> sample code to show us?
    > I just wanted to put a string of JTextFields with black backgrounds
    > right against each other so they look like one continuous field.
    
    Have you tried setting the borders on the text fields to null? Maybe it's
    the borders that make it look like there's a gap. Have you tried a
    different layout (maybe try GridLayout, just to see if it looks the same,
    it's much simpler so it will be easier to spot if you've done something
    wrong).
    
    Dan.
    
    --
    Daniel Dyer
    Empathy Software (http://www.empathysoftware.com)
    
    -----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
    http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
    -----== Over 80,000 Newsgroups - 16 Different Servers! =-----
- 10
  - Balanced TreeI was wondering if there were a built in (or freely available) library for
    handling balanced trees.
    
    I find many projects use them or could benefit from them.
    
    :)
- 12
  - Java client-server: what options are there?This is an issue that I have been pondering and investigating
    for years, and I wish there was a book, chapter or URL that
    covered it.
    
    I have to develop client-server systems in which the following
    is pretty much decided:
    
    - The database is Oracle 9iR2
    - The server OSs are Solaris and Linux
    - The clients (a few dozen) are Windows (XP?)
    - The client side runs on Java
    
    Those are the givens, the rest is up for grabs...
    
    The main undecided part is: exactly how to realize the client-server
    connection? That's what I would like to hear and read about.
    What options do I have?
    
    To get the ball rolling, I will share my experiences so far.
    
    First, I tried the JDBC approach, with a standalone application.
    There was a stored procedure in the server, and it was called
    from the client. The cons were: the size of the JDBC being much
    larger than my app, and there was also the issue of performance.
    I feel that I should move more of the functionality and heavy duty
    processing to the server side, where I can have plenty of horsepower.
    
    My second attempt was a Java applet which got its data
    through CGI-BIN from an OCI C program running on the server.
    The performance was pretty good and I'd like to stick with
    the OCI part but not with CGI-BIN.
    
    I just began the third approach: using SSH. The server part
    is a given since it comes ready in Linux, and I got the Java
    client part from sshtools.com.
    
    I have read about servlets, Tomcat, etc. but it looks like once
    I get into that stuff (the area seems to be called "Enterprise"),
    the tools become extremely expensive (for instance I will have
    to upgrade my $700 Developer JBuilder to a $3500 Enterprise JBuilder).
    
    The issue of performance still worries me (I am a speed freak):
    I wish I could just use the Unix R-commands (rsh, etc.) so all
    the encrypting-decrypting doesn't get in the way of client
    performance (my app is Intranet in a trusted environment) but
    I guess I can live with the more modern, secure, etc., SSH.
    
    Thanks very much for sharing your expert insight on this,
    (and if you are a writer deciding on a topic, I'll bet that
    this one will sell a lot of books! - anyone from O'Reilly
    out there?)
    
    -Ramon F Herrera
- 13
  - XML Validation problemI am having alot of trouble getting a XML document validated with a
    schema.
    
    I got a sample document and schema off of w3schools.com, which passed
    an online xml validator:
    http://tools.decisionsoft.com/schemaValidate.html. I cannot, however,
    get them validated programmatically.
    
    The documents are:
    
    node.xsd:
    
    <?xml version="1.0"?>
    <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
    targetNamespace="http://www.w3schools.com"
    xmlns="http://www.w3schools.com"
    elementFormDefault="qualified"><xs:element name="note">
    <xs:complexType>
    <xs:sequence>
    <xs:element name="to" type="xs:string"/>
    <xs:element name="from" type="xs:string"/>
    <xs:element name="heading" type="xs:string"/>
    <xs:element name="body" type="xs:string"/>
    </xs:sequence>
    </xs:complexType>
    </xs:element></xs:schema>
    
    node.xml:
    
    <?xml version="1.0"?>
    <note
    xmlns="http://www.w3schools.com"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.w3schools.com note.xsd">
    
    <to>Tove</to>
    <from>Jani</from>
    <heading>Reminder</heading>
    <body>Don't forget me this weekend!</body>
    </note>
    
    I'm using java 1.5 currently, although I had problems with 1.4 and
    xerces, so I'm pretty confident the problem isn't related to the java
    version.
    
    My code is:
    
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setIgnoringElementContentWhitespace(true);
    factory.setIgnoringComments(true);
    SchemaFactory sFact =
    SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
    
    factory.setSchema(sFact.newSchema(new java.io.File(SCHEMA_FILE)));
    
    DocumentBuilder builder = factory.newDocumentBuilder();
    builder.setErrorHandler(new ErrorHandler() {
    public void warning (SAXParseException exception) throws SAXException
    {
    System.err.println(exception);
    }
    public void error (SAXParseException exception) throws SAXException {
    System.err.println(exception);
    }
    public void fatalError (SAXParseException exception) throws
    SAXException {
    System.err.println(exception);
    }
    });
    
    org.w3c.dom.Document doc = builder.parse(file);
    
    The error I recieve is:
    
    org.xml.sax.SAXParseException:
    http://www.w3.org/TR/xml-schema-1#cvc-elt.1?note
    org.xml.sax.SAXParseException:
    http://www.w3.org/TR/xml-schema-1#cvc-elt.1?note
    Exception in thread "main" java.lang.IllegalStateException
    at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl$3.checkState(ValidatorHandlerImpl.java:411)
    at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl$3.getElementTypeInfo(ValidatorHandlerImpl.java:441)
    at com.sun.org.apache.xerces.internal.jaxp.JAXPValidatorComponent$SAX2XNI.elementAug(JAXPValidatorComponent.java:299)
    at com.sun.org.apache.xerces.internal.jaxp.JAXPValidatorComponent$SAX2XNI.endElement(JAXPValidatorComponent.java:291)
    at com.sun.org.apache.xerces.internal.jaxp.XNI2SAX.endElement(XNI2SAX.java:163)
    at com.sun.org.apache.xerces.internal.jaxp.validation.XNI2SAXEx.endElement(XNI2SAXEx.java:108)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.endElement(XMLSchemaValidator.java:818)
    at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl.endElement(ValidatorHandlerImpl.java:339)
    at com.sun.org.apache.xerces.internal.jaxp.XNI2SAX.endElement(XNI2SAX.java:163)
    at com.sun.org.apache.xerces.internal.jaxp.JAXPValidatorComponent.endElement(JAXPValidatorComponent.java:206)
    at com.sun.org.apache.xerces.internal.xinclude.XIncludeHandler.endElement(XIncludeHandler.java:790)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1685)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
    at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:248)
    at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:292)
    at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:169)
    ...
    
    I am behind a web proxy, and I don't know if the validation process
    involves retrieving files at the URLs in the xml and xsd files, which
    could be the problem.
    
    can someone shed some light on this?
    
    Thanks in advance.
- 13
  - JTable and associating objects with nodesHi,
    
    Does anyone know how to store objects in a name value pair data structure
    (i.e. hashmap) in a JTable? It easy to store the name of the object but to
    store the object with the name, I am not sure.
    
    Any help would be great
    
    Thanks
    
    Bob
- 13
  - Eclipse: browsing sourcecode using { as marksHello everyone,
    
    I am using eclipse 3.0.2 on Linux. Is it possible to browse
    Java-sourcecode using the brackets { as a jumping point?
    example
    
    public void foo(){ <- first entry
    
    if(isFoo){ <- second entry
    
    doFoo();
    
    }else{ <- third entry
    
    doAnotherFoo();
    
    }
    
    thanks alot for any help!
    
    kind regards
    
    Oliver

Author

Message

Frank D. Greco

Posted: 2004-10-9 23:11:00

Top

java-programmer, Applets and J2SE 5.0 - problems? I set my IE browser (corporate edict to use IE...ugh)
to use the 9/30 FCS release of 5.0

Whenever I visit a page with an applet, the browser
crashes.

Someone at our local user group (www.javasig.com)
mentioned something about version mismatches (???).

Anyone else experience this?

btw, kudos to Calvin Austin (J2SE 5.0 spec lead) and
the rest for a very organized and efficient release.

Frank G.
+==========================================+
| Crossroads Technologies Inc. |
| www.CrossroadsTech dot com |
| fgreco at REMOVE!cross!roads!tech!dot com|
+==========================================+

Andrew Thompson

Posted: 2004-10-10 0:33:00

Top

java-programmer >> Applets and J2SE 5.0 - problems? On Sat, 09 Oct 2004 11:11:19 -0400, Frank D. Greco wrote:

> Whenever I visit a page with an applet, the browser crashes.

Your IE crashes on this URL, then?
<http://www.physci.org/pc/property.jsp?prop=java.version>

(It is a simple 1.1 compatible applet that shows properties)

If it does not crash, what is the version reported?

[ Note - Follow-Ups set to c.l.j.programmer ]

--
Andrew Thompson
http://www.PhySci.org/codes/ Web & IT Help
http://www.PhySci.org/ Open-source software suite
http://www.1point1C.org/ Science & Technology
http://www.lensescapes.com/ Images that escape the mundane

Index ‹ java-programmer

Next
- 1
  - "Invalid column name" inserting a row with weblogic/oracle
    
    bsaastad wrote:
    
    > Hello,
    >
    >
    >
    > Environment
    >
    > Weblogic 8.1, Oracle 9.0.1, JDK1.4
    >
    >
    >
    > I am attempting to migrate from WLS 6.1 to WLS 8.1. All appears to work
    > with the exception of database inserts. They ALWAYS fail and return an
    > "ORA-00904: invalid column name". I am connecting to the database via a
    > pooled data source. This code worked fine under WLS6.1 using the
    > Weblogic JDriver. The JDriver performs the inserts under 8.1 but the
    > Statement.executeBatch() command returns a 0-length int[] (an
    > acknowledged bug in the JDriver.) BEA says to use the drivers supplied
    > by Oracle. I have tried both the type 4 driver and the type 2 oci
    > driver with exactly the same result.
    
    Odd. Would you pleaes download the latest appropriate version of
    oracle's driver and either run this code in a standalone program
    getting your connection directly from the driver, or get the driver
    to the front of the -classpath argument in the startWeblogic script,
    and then run this code in the server again?
    thanks,
    Joe Weinstein at BEA
    
    >
    >
    >
    > I can query the database via the connection and dump the contents of the
    > queried row along with the column names using the ResultMetaData.
    >
    >
    >
    > ex.
    >
    >
    >
    > ResultSet rs = stmt.executeQuery( sqlCmd );
    >
    > ResultSetMetaData rsmd = rs.getMetaData();
    >
    > System.out.println( "Results of '" + sqlCmd + "'");
    >
    > while ( rs.next() )
    >
    > {
    >
    > for( int i = 1; i <= rsmd.getColumnCount(); i++)
    >
    > {
    >
    > System.out.println( "'" + rsmd.getColumnName(i) +
    > "=" + rs.getString( i ) + "' " );
    >
    > }
    >
    > }
    >
    >
    >
    > .. produces:
    >
    >
    >
    > Results of 'SELECT POOL_ID, POOL_NM, POOL_DESC, REV_BY, REV_DT FROM
    > POOL_R WHERE POOL_ID = 11'
    >
    >
    >
    > 'POOL_ID=11'
    >
    > 'POOL_NM=COMM'
    >
    > 'POOL_DESC=Communications Servers'
    >
    > 'REV_BY=saastabp'
    >
    > 'REV_DT=2002-12-16'
    >
    >
    >
    > Then when I turn around and try to insert a row like this:
    >
    >
    >
    > String sqlCmd = "INSERT INTO POOL_R (POOL_ID, POOL_NM, POOL_DESC,
    > REV_BY, REV_DT) VALUES (100, 'FRED', 'TEST POOL NAME FOR FRED', 'test-
    > user', {ts '2003-10-24 16:00:26.703'})";
    >
    >
    >
    > System.out.println( "[" + sqlCmd + "]");
    >
    > stmt.executeUpdate( sqlCmd);
    >
    >
    >
    > .. I get the exception below. Has anyone seen this before? Any ideas?
    >
    >
    >
    > Thanks,
    >
    > -Brian
    >
    >
    >
    > [INSERT INTO POOL_R (POOL_ID, POOL_NM, POOL_DESC, REV_BY, REV_DT) VALUES
    > (100, 'FRED', 'TEST POOL NAME FOR FRED', 'test-user', {ts '2003-10-24
    > 16:00:26.703'})]
    >
    >
    >
    > java.sql.SQLException: ORA-00904: invalid column name
    >
    >
    >
    >
    >
    > at weblogic.rjvm.BasicOutboundRequest.sendReceive(BasicOutbound-
    > Request.java:108)
    >
    >
    >
    > at weblogic.rmi.internal.BasicRemoteRef.invoke(BasicRemoteRef-
    > .java:138)
    >
    >
    >
    > at weblogic.jdbc.rmi.internal.StatementImpl_weblogic_jdbc_wrapp-
    > er_Statement_oracle_jdbc_driver_OracleStatement_811_WLStub.exec-
    > uteUpdate(Unknown Source)
    >
    >
    >
    > at weblogic.jdbc.rmi.internal.StatementStub_weblogic_jdbc_rm-
    > i_internal_StatementImpl_weblogic_jdbc_wrapper_Statement_ora-
    > cle_jdbc_driver_OracleStatement_811_WLStub.executeUpdate(Unk-
    > nown Source)
    >
    >
    >
    > at weblogic.jdbc.rmi.SerialStatement_weblogic_jdbc_rmi_internal-
    > _StatementStub_weblogic_jdbc_rmi_internal_StatementImpl_weblogi-
    > c_jdbc_wrapper_Statement_oracle_jdbc_driver_OracleStatement_811-
    > _WLStub.executeUpdate(Unknown Source)
    >
    >
    >
    > at com.billing.tm.persist.BatchTest.doInsert(BatchTest.java:93)
    >
    >
    >
    > at com.billing.tm.persist.BatchTest.main(BatchTest.java:185)
    >
    >
    >
    > Caused by: java.sql.SQLException: ORA-00904: invalid column name
    >
    >
    >
    >
    >
    > at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError-
    > .java:134)
    >
    >
    >
    > at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:289)
    >
    >
    >
    > at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:579)
    >
    >
    >
    > at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1894)
    >
    >
    >
    > at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteFetch(TTC7Protocol-
    > .java:1094)
    >
    >
    >
    > at oracle.jdbc.driver.OracleStatement.executeNonQuery(OracleSta-
    > tement.java:2132)
    >
    >
    >
    > at oracle.jdbc.driver.OracleStatement.doExecuteOther(OracleStat-
    > ement.java:2015)
    >
    >
    >
    > at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(Orac-
    > leStatement.java:2877)
    >
    >
    >
    > at oracle.jdbc.driver.OracleStatement.executeUpdate(OracleState-
    > ment.java:858)
    >
    >
    >
    > at weblogic.jdbc.wrapper.Statement.executeUpdate(Statement-
    > .java:328)
    >
    >
    >
    > at weblogic.jdbc.rmi.internal.StatementImpl_weblogic_jdbc_wrapp-
    > er_Statement_oracle_jdbc_driver_OracleStatement.executeUpdate(U-
    > nknown Source)
    >
    >
    >
    > at weblogic.jdbc.rmi.internal.StatementImpl_weblogic_jdbc_wrapp-
    > er_Statement_oracle_jdbc_driver_OracleStatement_WLSkel.invoke(U-
    > nknown Source)
    >
    >
    >
    > at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef-
    > .java:466)
    >
    >
    >
    > at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef-
    > .java:409)
    >
    >
    >
    > at weblogic.security.acl.internal.AuthenticatedSubject.doAs(Aut-
    > henticatedSubject.java:353)
    >
    >
    >
    > at weblogic.security.service.SecurityManager.runAs(SecurityMana-
    > ger.java:144)
    >
    >
    >
    > at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServ-
    > erRef.java:404)
    >
    >
    >
    > at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecu-
    > teRequest.java:30)
    >
    >
    >
    > at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java)
    >
    >
    >
    > at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
    >
    >
    > --
    > Posted via http://dbforums.com
- 2
  - Unicode value of a characterHi,
    
    I am a beginner in Java programming and I would like to know which
    code ( program ) I must write to get the Unicode value of any
    character ?
    
    Thank you very much for your help !
    
    JPR105.
- 3
  - I am having trouble with OJB and locking when adding things that have cascading relationshipsHi all, I am using OJB and I can't seem to add a record to the
    database if that object contains another object that is a) mapped in
    the mapping and b) not already in the mapping. The error I get is:
    
    OJB works reliably in all the other test suits:
    -- adding any object and not imposing any connections, ie, they have
    no elements that need to cascade
    -- retreiving results (either with a criteria or alll records)
    
    I dont know whats going on and would appreciate som ehelp - thanks in
    advance
    
    Josh
    
    Time: 2.674
    There was 1 error:
    1) testAddProjectWithExistingEmployer(com.joshlong.portfolio.bos.tests.PortfolioTest)com.joshlong.portfolio.PortfolioException:
    org.odmg.LockNotGrantedException: Can not lock ID:0Finished:Mon Nov 10
    04:02:34 PST 2003
    Started:Mon Nov 10 04:02:34 PST 2003
    Title:Foo Bar
    Employer:
    ------------------------
    
    public void testAddProjectWithNewEmployer()
    throws Exception {
    // the pk for the Employer class is id and I didnt
    //set it -- I want OJB to add it as well as add the Employer
    //which also doesnt have the pk set which I presume makes it
    // add it as opposed to updating it ...
    
    Employer employer = new Employer();
    employer.setContactInfo("this is the contact info");
    employer.setName("le nom - " + new Date());
    employer.setDuties("a;b;c;d");
    
    portfolio.addEmployer(employer); // see below fo rthe code
    behind addEmployer ( Employer);
    
    Employer e = portfolio.getEmployerByName(name);
    
    Project project = new Project();
    project.setEmployer(employer);
    
    project.setDescription("This is a description of the
    things.");
    project.setFinished(new Date());
    project.setStarted(new Date());
    project.setName("Joshua Long");
    portfolio.addProject(project);
    }
    
    addEmployer is basically just a more specific method that in turn
    calls:
    void addRecord ( Object record )
    throws PortfolioException
    {
    Implementation i = OJB.getInstance();
    Database db = i.newDatabase();
    db.open("default", Database.OPEN_READ_WRITE);
    Transaction txc = i.newTransaction();
    txc.begin();
    txc.lock(record, Transaction.WRITE);
    txc.commit();
    db.close() ;
    }
- 4
  - XPathAPI(node, xpathStr) & XPathContext.getDTMHandleFromNode(node) slowHello,
    
    I am using xalan 2.7.0: http://xml.apache.org/xalan-j/
    As I run XPathAPI.eval(node, xpathStr) over and over again on several
    nodes, it gets slower and slower.
    This is documented in the XPathAPI documentation, and it suggests to
    use the low-level XPath API:
    http://xml.apache.org/xalan-j/apidocs/org/apache/xpath/XPathAPI.html
    
    I am now using the low-level XPath API as follows:
    XPathContext xpathSupport = new XPathContext();
    PrefixResolverDefault prefixResolver = new
    PrefixResolverDefault(document);
    XPath xpath = new XPath(xpathStr, null, prefixResolver,
    XPath.SELECT, null);
    
    and then, for each node:
    int ctxtNode = xpathSupport.getDTMHandleFromNode(contextNode);
    XObject object = xpath.execute(xpathSupport, node,
    prefixResolver);
    
    It gets a bit better, but still, after using over and over again on
    several nodes, it gets slower and slower.
    I think that the problem is that
    XPathContext.getDTMHandleFromNode(child) does not free memory.
    
    Test this simplistic example yourself:
    ++++++++++++++++++++++++++++++++++++++++++++
    import org.w3c.dom.*;
    import javax.xml.parsers.*;
    import javax.xml.transform.*;
    import javax.xml.transform.dom.*;
    import org.apache.xpath.*;
    import org.apache.xml.utils.*;
    
    public class Test {
    public static void main(String[] argv) throws Exception {
    int numChilds = 100000+1;
    
    System.out.println("Building a document with " + numChilds + "
    childs");
    Document doc =
    DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
    Element root = doc.createElement("root");
    doc.appendChild(root);
    for (int i = 0; i < numChilds; i ++) {
    Element child = doc.createElement("child");
    root.appendChild(child);
    Element subChild = doc.createElement("sub-child");
    child.appendChild(subChild);
    Element subSubChild = doc.createElement("sub-sub-child");
    subChild.appendChild(subSubChild);
    subSubChild.setAttribute("title", "title" + i);
    }
    
    XPathContext xpathSupport = new XPathContext();
    PrefixResolverDefault prefixResolver = new
    PrefixResolverDefault(doc);
    XPath titleXpath = new XPath("sub-child/sub-sub-child/@title",
    null, prefixResolver, XPath.SELECT, null);
    Runtime r = Runtime.getRuntime();
    
    System.out.println("Evaluating XPath for each " + numChilds +
    " childs");
    NodeList nodeList = root.getChildNodes();
    int size = nodeList.getLength();
    for (int i = 0; i < size; i++) {
    long start = System.currentTimeMillis();
    Element child = (Element) nodeList.item(i);
    int ctxtNode = xpathSupport.getDTMHandleFromNode(child);
    //String title = titleXpath.execute(xpathSupport,
    ctxtNode, prefixResolver).toString();
    long duration = System.currentTimeMillis() - start;
    if (i < 10 || (i % (numChilds/10)) == 0)
    System.out.println("child #" + i + "\t took " +
    duration + " ms." +
    "\tfreeMemory: " + r.freeMemory() +
    "\ttotalMemory: "+r.totalMemory());
    else if (i == 10)
    System.out.println("printing some selected childs only
    from now on...");
    }
    }
    }
    
    ++++++++++++++++++++++++++++++++++++++++++++
    Here you can see an example of the result:
    
    $ java Test
    Building a document with 100001 childs
    Evaluating XPath for each 100001 childs
    child #0 took 77 ms. freeMemory: 10642840 totalMemory:
    45129728
    child #1 took 1 ms. freeMemory: 10583848 totalMemory:
    45129728
    child #2 took 0 ms. freeMemory: 10583848 totalMemory:
    45129728
    child #3 took 0 ms. freeMemory: 10583848 totalMemory:
    45129728
    child #4 took 0 ms. freeMemory: 10583848 totalMemory:
    45129728
    child #5 took 0 ms. freeMemory: 10583848 totalMemory:
    45129728
    child #6 took 0 ms. freeMemory: 10583848 totalMemory:
    45129728
    child #7 took 1 ms. freeMemory: 10583848 totalMemory:
    45129728
    child #8 took 0 ms. freeMemory: 10583848 totalMemory:
    45129728
    child #9 took 0 ms. freeMemory: 10583848 totalMemory:
    45129728
    printing some selected childs only from now on...
    child #10000 took 3 ms. freeMemory: 10980392 totalMemory:
    45129728
    child #20000 took 5 ms. freeMemory: 9976808 totalMemory:
    45129728
    child #30000 took 7 ms. freeMemory: 6332656 totalMemory:
    45129728
    child #40000 took 9 ms. freeMemory: 5112168 totalMemory:
    45129728
    child #50000 took 12 ms. freeMemory: 1373472 totalMemory:
    45129728
    child #60000 took 14 ms. freeMemory: 19851264 totalMemory:
    66650112
    child #70000 took 16 ms. freeMemory: 16515832 totalMemory:
    66650112
    child #80000 took 19 ms. freeMemory: 15040280 totalMemory:
    66650112
    child #90000 took 21 ms. freeMemory: 7435744 totalMemory:
    66650112
    child #100000 took 24 ms. freeMemory: 17416944 totalMemory:
    66650112
    
    ++++++++++++++++++++++++++++++++++++++++++++
    each time I call xpathSupport.getDTMHandleFromNode(child) it does not
    free the memory,
    and so it gets slower and slower.
    
    How to solve this problem?
    Some people has suggested to use the DOM4J package instead of Xalan.
    However, we already have quite a lot of software using Xalan and
    changing the code would have some cost.
    Is it possible to solve this problem without discarding xalan?
    
    Regards,
    DAvid
- 5
  - tomcat/applet question...this is really weird, in tomcat/webapps/<appName>I have a jsp AND an
    applet.. I'm using a package called smack for writing jabber clients
    (http://www.jivesoftware.org/smack/), so:
    
    in jsp:
    <%@ page import="org.jivesoftware.smack.*"%>
    no problems...
    
    in applet:
    import org.jivesoftware.smack.*;
    when try to compile get told this package doesn't exist...
    
    package is where all packages are supposed to be in Tomcat
    (C:\tomcat\common\lib) and, again, the jsp has no problems with it, but
    the applet, which is in exact same location as jsp, for some reason
    can't find it..
    
    (in applet am even getting en error (identifier expected) on
    system.out.println()... don't know what to make of this..
    this is line: System.out.println("test");...)
    
    weird thing is, if I hide System.out.println() line get told package
    smack doesn't exist.. if I don't hide System.out.println() line get
    ONLY identifier-expected error on System.out.println() line..
    
    would appreciate any help... thank you.. Frances
- 6
  - Form doesn't submit onUnload in NetscapeDear Netscape/Javascript/Java gurus,
    
    I am trying to submit a form onUnLoad when the user accidentally
    closes the browser before clicking on a link to complete the
    transaction.
    
    On IE, this works fine.
    But on Netscape or Mozzilla browsers, the form would simply not submit
    when
    the browser is closed.
    
    here is the code.
    <script language="JavaScript">
    function CheckWindowClosed() {
    document.MyForm.submit();
    }
    </script>
    
    <body onLoad="FunctionHandler();" onUnload="CheckWindowClosed();">
    
    Kindly let me know if there is any workaround or fix where I can get
    this working on Netscape.
    
    Thanks and Regards,
    Yash
- 7
  - where is the maximize button in JDialog?Anybody knows how to get a JDialog to display a maximize
    button like a JFrame does? The default JDialog does not come with
    maximize or minimize button? I checked out the API for JDialog and
    could not find the answer. Can anybody help me out?
- 8
  - The server encountered an internal error () that prevented itHi All
    
    I am using Developing a Spring Framework MVC application step-by-step
    from www.springframework.org. I use apache-tomcat-5.5.23, Ant 1.6 and
    jdk1.4.
    when i used ant, ant deploy, ant list and ant build the these all
    commands
    give me message suceessful but when i write url(http://localhost:8080/
    springapp/hello.htm) on the browser then I am getting the following
    error. do you have solution for this problem.
    
    type Exception report
    
    message
    
    description The server encountered an internal error () that prevented
    it from fulfilling this request.
    
    exception
    
    org.apache.jasper.JasperException: /WEB-INF/jsp/hello.jsp(1,1) The
    absolute uri: http://java.sun.com/jstl/core cannot be resolved in
    either web.xml or the jar files deployed with this application
    org.apache.jasper.compiler.DefaultErrorHandler.jsp
    Error(DefaultErrorHandler.java:40)
    org.apache.jasper.compiler.ErrorDispatcher.dispatc
    h(ErrorDispatcher.java:407)
    org.apache.jasper.compiler.ErrorDispatcher.jspErro
    r(ErrorDispatcher.java:88)
    org.apache.jasper.compiler.Parser.processIncludeDi rective(Parser.java:
    340)
    org.apache.jasper.compiler.Parser.parseIncludeDire ctive(Parser.java:
    373)
    org.apache.jasper.compiler.Parser.parseDirective(P arser.java:485)
    org.apache.jasper.compiler.Parser.parseElements(Pa rser.java:1557)
    org.apache.jasper.compiler.Parser.parse(Parser.jav a:127)
    org.apache.jasper.compiler.ParserController.doPars
    e(ParserController.java:212)
    org.apache.jasper.compiler.ParserController.parse( ParserController.java:
    101)
    org.apache.jasper.compiler.Compiler.generateJava(C ompiler.java:156)
    org.apache.jasper.compiler.Compiler.compile(Compil er.java:296)
    org.apache.jasper.compiler.Compiler.compile(Compil er.java:277)
    org.apache.jasper.compiler.Compiler.compile(Compil er.java:265)
    org.apache.jasper.JspCompilationContext.compile(Js
    pCompilationContext.java:564)
    org.apache.jasper.servlet.JspServletWrapper.servic
    e(JspServletWrapper.java:299)
    org.apache.jasper.servlet.JspServlet.serviceJspFil e(JspServlet.java:
    315)
    org.apache.jasper.servlet.JspServlet.service(JspSe rvlet.java:265)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:803)
    org.springframework.web.servlet.view.InternalResou
    rceView.renderMergedOutputModel(InternalResourceVi ew.java:97)
    org.springframework.web.servlet.view.AbstractView.
    render(AbstractView.java:250)
    org.springframework.web.servlet.DispatcherServlet.
    render(DispatcherServlet.java:928)
    org.springframework.web.servlet.DispatcherServlet.
    doDispatch(DispatcherServlet.java:705)
    org.springframework.web.servlet.DispatcherServlet.
    doService(DispatcherServlet.java:625)
    org.springframework.web.servlet.FrameworkServlet.s
    erviceWrapper(FrameworkServlet.java:386)
    org.springframework.web.servlet.FrameworkServlet.d
    oGet(FrameworkServlet.java:346)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:690)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:803)
    
    Thanks
- 9
  - Sessionhandling with Apache AxisHello Group,
    
    i 've already written a littlr webservice with Apache Axis.
    My Service starts a thread to process some data. The Client may
    Access the output via different functions.
    Everything very fine.
    But if i kick the Client and the Session times out after 30
    minutes, the thread is still running... and running... and running...
    
    I want to tell the Service to kick the Thread after a timeout,
    maybe this should possible via a Session.
    
    How can i find out if a Session is timed out?
    
    Thanks for your help and a happy x-mas (ok ok, some days to early :-) )
    Greetings,
    Steffen
- 10
  - Problem with Session Beans stateHi, I'm currently making a session bean, which will eventually act as
    a Shopping Basket.
    
    I have implemented the bean so that it just accepts a string (which
    will eventually be an object reference), and the user can add and
    remove strings.
    
    Unfortunately, if I access the same bean from another machine and
    create an instance of the session bean, they are shown the same
    contents as from the other machine.
    
    The session bean type is set to stateful (and I have tried stateless).
    Can anyone point me in the direction of the problem please?
    
    Cheers,
    David
- 11
  - problem with xercesImpl.jarI'm deploying a simple XML parsing servlet using the latest
    2.5.0 xerces jars in it's lib directory.
    
    This servlet runs fine on my local machine, but when I deploy it
    to the production server, the JRE throws a java.lang.NoSuchMethodError
    for the method
    method parse(Ljava/io/InputStream;Lorg/xml/sax/helpers/DefaultHandler;)V not found
    
    This method is definitely in the latest xerces jar, so I'm guessing
    it's picking up an obsolete jar file somewhere before the current
    jar in the classpath.
    
    Unfortunately I have little control over the production server, so
    can anyone suggest how I can force xerces to use the actual
    latest library?
    
    Thanks,
    Sean
- 12
  - JTable and optimal column width.Hi!
    
    I have a JTable which has to columns filled over an 'String[][]'. Is it
    possible, to set the cell width to the longest value in an column?
    
    I found a solution with String.lengt() over Google, but this doesn't work
    correctly because the value of String.length() doesn't fit exactly. I think
    this is because the proportional fonts.
    
    Greetings,
    Christian.
- 13
  - Secret LaunchJoin now to make money
    http://www.secretlaunch.com/?codelion
- 14
  - JCE - load key from stringHi All,
    
    We're trying to use JCE to encrypt some data. The issue is key storage.
    We want to store it in some database, so the question is how to
    re-create the key for decryption from varchar2 column?
    
    The key in string form looks like this:
    
    cryptix.jce.provider.key.RawSecretKey@3bfce353
    
    This can be stored in the database easily. But how to load this into
    KeyStore back?
    
    TIA
    Michael
- 15
  - data lost issue using socketsHi,
    
    I have an interesting issue with socket programming.
    
    I would like to send String based information via Sockets.
    
    As it could happen, that a part of the information gets lost on its
    way to the client, I would like to send before all such packages the
    size of the package as a "short" value (or something equal, but not
    string because you can never be sure that your string completely
    arrived ).
    
    Does anybody know what is an elegant solution for this problem?
    
    I send the strings using:
    
    PrintWriter out = new PrintWriter(client.getOutputStream(), true);
    out.println("test");
    
    Thanks,
    
    korcs