java-programmer >>garbled JFrame

garbled JFrame

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- 1
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    used it in programming in a company or in a website or e-commerce.
    
    Is Java really opensource or not?
    And so when will be the time you have to pay for its license?
    
    Thanks!!!
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  - Painting overHello,
    
    I have written code to generate "Fractal Landscap", we can consider that
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    Now I would like to paint ON IT. I mean paint star in one part of
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    I dont want to repaint() "Fractal Landscape" because it is very slow,
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    thx
    
    M
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    When I use the following URL in Internet Explorer:
    
    http://localhost/servlet/HelloWorldExample
    
    I get an error message:
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    HTTP Status 404 - /servlet/HelloWorldExample
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    I have the HelloWorldExample.class file in
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    Can anyone help me please?
    
    Best regards,
    
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    tag, or to save and/or print. Another possibility is to pass the image
    up to a php script for further processing on the server. I know that
    you can use ImageIO to save the image to a ByteArrayOutputStream, and
    then use the stream's toString to get a string, but passing that string
    to javascript truncates the image after the first 4 characters, due to a
    null character (hex 0). I have been able to encode the string to
    base64, but I do not know if anything more is needed to be done for the
    javascript function to use it as an image.
    
    I know that you can embed images in HTML by storing a special string
    representation of the image in a javascript variable, but I do not know
    what this format is. If I knew this format, I could encode the image in
    Java, and then pass this string on. Any one know anything that could
    help me?
    
    Darcy Kahle
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    JFileChooser? I began digging in the source code for UIManager.java,
    BasicFileChooserUI.java, and others, and rapidly got lost.
    
    Ultimately a call is made to, e.g.,
    UIManager.getString("FileChooser.helpButtonToolTipText", someLocale),
    but I can't figure out how the UIDefaults that UIManager uses to locate
    this string is actually initialized.
    
    Thanks,
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    I am a newbie in the world of Java programming. I have recently started
    learning the language. Apart from other hickups one which has been on
    my nerves is the concept of multidimensional arrays. As far as my
    understanding goes these are array of arrays.
    
    1. WHAT DOES THIS MEAN?
    
    2. ARE ARRAYS RESTRICTED TO THREE DIMENSIONS ONLY OR THERE IS ANY OTHER
    LIMIT AND HOW DOES THREE DIMENSIONAL OR HIGHER DIM ARRAYS WORK?
    
    Does two dim arrays represent a pigeon hole type thing in which you
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    located at row 5 and column 2.
    
    3. IF THIS CONCEPT OF TWO DIMENSIONAL ARRAYS IS CORRECT THEN HOW DOES
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    Presently I am going through a book written by Herber Schildt known as
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    the two dim arrays. I am unable to understand the make of the program
    may be so many loops are troubling me. I am especially confused about
    the functioning of the question mark steps please help me out there.
    
    // Demonstration of concept of two dimensional arrays
    
    class twoD {
    public static void main (String args [ ]) {
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    int i,j,k = 0;
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    twoD [i][j] = k; ?
    k++; ?
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    for (i=0; i<4; i++) {
    for (j=0; j<5; j++)
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    System.out.println();
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    }
    }
    
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    browser it will automatically opens or the embedded pdf will goes off.
    
    To prevent this scenario, we can use a mechanism. First create a
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    <iframe style="DISPLAY: none" name="iframe1" src="">
    
    Now make a small change to your download link so that the url target
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    <a href="..." target="iframe1">Download</a>
    
    This will solve the problem. However this method will not work with
    Internet Explorer. For IE we can use another method and that method
    can be choosen automatically by the browser.
    
    More java tips @ http://sourcecentral.blogspot.com
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    replacement for field "textarea" and it work fine but store in a db (oracle)
    field information with html tag ... there is a program (freeware or
    shareware) can j use to print this field without loss this information?
    
    crystal report is OK but it's too expensive!!!
    
    thank in advance
    Marco
    
    sorry for my poor english
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    Sorry I couldn't find a XML/XSL group
    I can only post these groups close to my subject.
    
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    String v = myBean.getValue();
    %>
    
    <form .... >
    <input name="myTag" value="<%= v %>">
    </form>
    
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    <myTag attribute1="value1" />
    
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    But XSL doesn't like this
    
    <input name="myTag" value='
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    I am getting the following error.
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    word processing program that supports JTextPane but they specifically
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    Clipboard.setContents(..) method but I'm not sure yet by which procedure I
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    be filled with the Document's data (ie, plain text *and* the control/style
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    that.
    
    Seems like there's very little (if anything) mentioned in the sun
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    First of all, is Java's support for RTF still somewhat "primative"??? I
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    >write the code between them, and you won't forget anything. This is what
    >I always do and I've nevere left out a bracket.
    
    Long ago, I programmed Slickedit to produce a right bracket every time
    I typed a left bracket.
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    Balmer Consulting
    email***@***.com
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    Windows 2000. I am following the jakarta guidelines exactly as they
    propose, but I am having absolutely no luck. What am I doing wrong?
    
    Here is the procedure I follow:
    
    First, I run the following command -
    
    keytool -genkey -keyalg rsa -alias name -keystore name
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    my name, and a second time as the the URL used to access the site in
    question, ie: sitename.com
    
    Then, I issue the following command -
    
    keytool -certreq -keystore name -alias name -file name.csr
    
    Next, I send the name.csr file to the CA, and recieve 3 certificates.
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    NewCert.cer. So, I then issue the following commands in this order:
    
    keytool -import -trustcacerts -file RootCert.cer -alias rootcert
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    -keystore name
    keytool -import -trustcacerts -file NewCert.cer -alias newcert
    -keystore name
    
    After each command I receive confirmation that the certification was
    properly inserted. I then copy the 'name' file to TOMCAT_HOME/conf
    and edit the server.xml file. I add the following lines to the
    server.xml file:
    
    <Http10Connector
    port="8443"
    secure="true"
    keystore="c:\tomcat\conf\name"
    keypass="password"
    clientauth="false"/>
    
    Now, I restart tomcat and assume that everything should be in order.
    When starting tomcat via the batch file, I see that an Http10Connector
    is correctly sitting on port 8443. So, I try accessing the site
    normally, and everything works fine. However, if I attempt an HTTPS
    request to the site, I receive a page cannot be displayed error. This
    is strange, because I figured that at this point it should work.
    Well, I then attempted to access it manually by addressing
    localhost:8443 .... this is where I noticed a problem. Once the
    request is sent to Tomcat, Tomcat throws the following exception:
    
    PoolTcpEndpoint: Handshake failed
    javax.net.ssl.SSLException: Unrecognized SSL handshake.
    at com.sun.net.ssl.internal.ssl.InputRecord.read(DashoA6275)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.a(DashoA6275)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.a(DashoA6275)
    at com.sun.net.ssl.internal.ssl.AppOutputStream.write(DashoA6275)
    at java.io.OutputStream.write(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(DashoA6275)
    at org.apache.tomcat.util.net.JSSESocketFactory.handshake(JSSESocketFactory.java:270)
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    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:516)
    at java.lang.Thread.run(Unknown Source)
    ThreadPool: Caught exception executing
    org.apache.tomcat.util.net.TcpWorkerThread@3a8602, terminating thread
    java.lang.NullPointerException
    at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:498)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:516)
    at java.lang.Thread.run(Unknown Source)
    
    What is going on? Luckily, I have access to a CA, so this process
    isn't costing me anything, however I have attempted this multiple
    times with various certificates and various settings on the
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    tried creating a self signed certificate and I still get this
    exception. Am I doing something wrong? I have scoured the net
    countless times and it seems like all the instructions say the same
    thing. When I search for this error, none of the recomendations fit
    my situation. If no one knows how to fix this, could someone please
    recomend where I can go so that I can find the answer to this problem?
    
    Please help me out, this is driving me nuts. Thanks in advance,
    Dan
- 11
  - JSplitPane/JScrollPane Problem?Hey,
    I'm writing an interface that has a verticle split pane, the top
    and bottom of which both contain JScrollPanes with JEditor panes inside
    each scrollpane. It sits within a JTabbedPane which is in a
    JInternalFrame on a JDesktopPane.
    
    JDesktopPane --> JTabbedPane --> Tab --> JSplitPane --> 2 ScrollPanes
    --> 2 JEditorPanes.
    
    The first EditorPane is a source area and the second is an error
    output area. It's been working fine for me, which makes my current
    dilema even worse.
    
    I need to do the same format of error for an output tab so that
    the output area is on top and the error output is on bottom. I took
    the code from the previous working implementation and ported it and for
    some reason it didn't work. The top component JScrollPane-->
    JEditorPane does not show, but the bottom one does. Also, if I just
    add the JScrollPane instead of the JSplitPane to the tab, it still
    doesn't show, leading me to believe that it is a problem with the
    implementation of the JScrollPane. Here are the code snippets of the
    working and non-working portions of my code.
    
    -----Working-----
    source = new JEditorPane();
    sourceError = new JEditorPane();
    sourceError.setEditable(false);
    JScrollPane scrollPane = new JScrollPane(source,
    
    JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
    
    JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
    
    scrollPane.setBorder(BorderFactory.createEmptyBorder());
    JScrollPane errorScrollPane = new
    JScrollPane(sourceError);
    
    errorScrollPane.setBorder(BorderFactory.createEmptyBorder());
    sourceSplit = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
    scrollPane,
    errorScrollPane);
    
    sourceSplit.setBorder(BorderFactory.createEmptyBorder());
    -----Not Working-----
    expressionOut = new JEditorPane();
    outputError = new JEditorPane();
    expressionOut.setEditable(false);
    outputError.setEditable(false);
    JScrollPane outputScroller = new
    JScrollPane(expressionOut,
    
    JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
    
    JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
    
    outputScroller.setBorder(BorderFactory.createEmptyBorder());
    JScrollPane outErrorScroller = new
    JScrollPane(outputError);
    
    outErrorScroller.setBorder(BorderFactory.createEmptyBorder());
    sourceSplit = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
    outputScroller, outErrorScroller);
    
    outputSplit.setBorder(BorderFactory.createEmptyBorder());
    -----How They Are Added-----
    tabFrame.addTab("Source", sourceSplit);
    tabFrame.addTab("Output", outputSplit);
    ---------------
    Any Ideas on why it isn't showing expressionOut?

Author

Message

patrick

Posted: 2003-12-5 16:33:00

Top

java-programmer, garbled JFrame

Ive got a a JFrame class displaying many JLabels with images inside.
It displays fine and I can drag it around the desktop ok.
But when I drag another window over the JFrame my JFrame gets garbled.(get
multiple images of the labels)
Even when i minimize it and maximize it is still garbled.

why would that be?

TIA

patrick

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    > Path and classpath I have put correctly in windowxp.. as follow
    > path=C:\oracle..etc ;C:\Program File\java\Jdk1.5.0_09\bin
    > classpath= .;C:\Program File\java\Jdk1.5.0_09\lib\root.jar
    > Now when I check version for java and javac.. in other then Jdk1 directory
    > I am getting version 1.3.1 where as jdk gives me it version I checked oracle
    > directories
    > In Oracle directory.. jre show 1.3.1 directory...
    > how can I correct this problem.. my simple program compiles but running from
    > promp gives error..
    >
    > would highly appreciate help
    > :-) just starting learning Java..
    >
    > A Khalak
    
    Change the path setting so it reads:
    
    PATH=C:\Program File\java\Jdk1.5.0_09\bin;C:\oracle;...
    
    The OS looks for commands on the PATH from left to right, so starting
    with java, then oracle, and so on.
    
    Besides this. The classpath setting isn't really needed. This is a
    general note which might bring in problems later. If you don't have a
    real need for it, simply remove the classpath setting. You can still
    pass it to the java command using the "-classpath" switch.
    
    Regards,
    
    Bart
- 12
  - An efficient computation idea. Please commentHi,
    
    In my program I evaluate long trigonometric polynomials a lot! For example,
    
    final int N = 1000;
    double[] c = new double[N];
    // Populate c
    double x = .5, sum = 0.0;
    
    for (int i = 0; i < N; i++)
    sum += c[i]*cos(i*x);
    
    And this function is evaluated very many times (about 100,000). So why not
    create a java snippet, compile it, load it as a class and use the compiled
    version. So I would have something like;
    
    String sum = "0"; // A String buffer, of course...
    for (int i = 0; i < N; i++)
    sum += "+" + c[i] + "*cos(" + i + "*x)";
    sum += ";";
    
    I think it's a pretty cool idea. But before I implement it, I would like to
    know what you think about it!
    
    Thank you in advance!
    
    Aaron Fude
- 13
  - Problem in configuring SSL in Tomcat5.5Hi,
    
    I have Tomcat5.5 and J2sdk5 installed on my system. I wanted turn on
    SSL services in tomcat. I went through the Tomcat Documentation and
    did it exactly. I modified server.xml as below,
    
    
    
    <Connector port="8443" maxHttpHeaderSize="8192"
    maxThreads="150" minSpareThreads="25"
    maxSpareThreads="75"
    enableLookups="false" disableUploadTimeout="true"
    acceptCount="100" scheme="https" secure="true"
    clientAuth="false" sslProtocol="TLS" />
    
    I also created certificate using keytool with default password as
    "changeit" and alias as "tomcat".
    
    I restarted the tomcat services too, and then tried to access the page
    but i am not able to access it using https connection. Where as i am
    able to access same page using Http connection.
    
    Secondly, I am not able to access default tomcat Page too using Https
    connection. Everything works fine in case of HTTP connection.
    
    Following is the way iam trying to acces the page,
    
    https://localhost:8443
    
    Can any one help me out to find the problem.
    I have IE 6 with SP2 installed on my system.
    
    Thanks
    Minesh
- 14
  - empty interfaces via reflectionOn Oct 14, 12:17 pm, "Aryeh M. Friedman" <email***@***.com>
    wrote:
    > On Oct 14, 6:01 pm, Steven Simpson <email***@***.com> wrote:
    >
    >
    >
    > > Aryeh M. Friedman wrote:
    > > > Then how do you handle the return type?!?!?!? Namely I can't do:
    >
    > > > Class<?> testClass = loadTestClass();
    > > > Object testInstance = testClass.newInstance();
    > > > Result res=new Result();
    >
    > > > for (Method method: testClass.getDeclaredMethods())
    > > > res.merge((Result) method.invoke(testInstance, new
    > > > Object[0])); // cast exception
    >
    > > > The reason why it is not possible is any Result object created by a
    > > > test is <MyClassLoader>.Result and all the results here are
    > > > <SystemClassLoader>.Result
    >
    > > Looking back at an earlier post, your custom MyClassLoader goes like this:
    >
    > > > public class MyClassLoader extends ClassLoader
    > > > {
    > > > public Class loadClass(String name)
    > > > {
    > > > try {
    > > > if(name.startsWith("java."))
    > > > return super.loadClass(name);
    >
    > > A custom ClassLoader is expected to override findClass(String) rather
    > > than loadClass(String), as the latter (indirectly) accomplishes this
    > > behaviour:
    >
    > > <http://java.sun.com/javase/6/docs/api/java/lang/ClassLoader.html>
    >
    > > "When requested to find a class or resource, a ClassLoader instance will
    > > delegate the search for the class or resource to its parent class loader
    > > before attempting to find the class or resource itself."
    >
    > > MyClassLoader is loading Result instead of delegating to its parent
    > > first, which should always find it first.
    >
    > I just tested:import java.io.*;
    > import java.lang.reflect.*;
    >
    > public class MyClassLoader extends ClassLoader
    > {
    > public Class findClass(String name)
    > {
    > try {
    > //if(name.startsWith("java."))
    > // return super.loadClass(name);
    >
    > FileInputStream fis=new FileInputStream(name
    > +".class");
    > byte[] b=new byte[fis.available()];
    >
    > fis.read(b);
    > fis.close();
    >
    > return defineClass(name,b,0,b.length);
    > } catch(Throwable e) {
    > e.printStackTrace();
    > }
    >
    > return null;
    >
    > }
    >
    > and now the class loader no longer honors recompiled classes:
    >
    > Script started on Sun Oct 14 15:09:05 2007
    > jtest@monster:/home/jtest% java Main
    > 1
    > ^Z
    > Suspended
    > jtest@monster:/home/jtest% cat foo
    > import java.lang.reflect.*;
    >
    > public class MyClass
    > {
    > public MyClass()
    > {
    > ack=new Integer(2);
    > }
    >
    > public Integer getAck()
    > {
    > return ack;
    > }
    >
    > private int foo;
    > private Integer ack;}
    >
    > jtest@monster:/home/jtest% cp foo MyClass.java
    > jtest@monster:/home/jtest% javac MyClass.java
    > jtest@monster:/home/jtest% fg
    > java Main
    >
    > 1
    > ^C
    > jtest@monster:/home/jtest% exit
    > Script ends on Sun Oct 14 15:09:45 2007
    >
    > Just for ref here is the new main():
    >
    > public class Main
    > {
    > public static void main(String[] args)
    > throws Throwable
    > {
    > while(true) {
    > ClassLoader loader=new MyClassLoader();
    > Class klass=loader.loadClass("MyClass");
    >
    > MyClass m=(MyClass) klass.newInstance();
    >
    > System.out.println(m.getAck());
    > System.in.read();
    > }
    > }
    >
    > }
    
    You should simply use UrlClassLoader and have the system classpath not
    include your code that needs to be reloaded, and the URLClassLoader
    have the path that DOES need to be reloaded (creating a new instance
    of that class loader every time you need to reload the class)
    
    That way, Result will be properly loaded by the System class loader,
    and your reloadable class wont.
    
    Hoep this helps,
    Daniel.
- 15
  - Initialize managed bean with header information?We use Netegrity's SiteMinder for SSO security on all web apps.
    Although SiteMinder handles security for accessing the application
    itself, restrictions to certain functions and data are handled within
    the application based on user type.
    The user information (such as name, type, etc.) are passed in from
    SiteMinder via header variables. ie:
    hddr_user = Joe Blo
    hddr_group = Admin
    hddr_phone = 555-555-5555
    
    I'm looking at different designs to capture all of this user
    information from the headers at one time and store as a bean in the
    user's session (so as to not need to continually reference the header
    information).
    
    Does anyone know if you can create a managed bean (ie. User) that is
    initialized with header information (by using the configuration file
    w/ value-binding expressions)?