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Thread: Java and Flickr - Help with Inheritance between Main Class and sub-class

  1. #1
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    Exclamation Java and Flickr - Help with Inheritance between Main Class and sub-class

    Dear all,

    I have been doing a small program which can help user search general photos by keywords and can retrieve most recent general uploads from Flickr.

    I created 4 classes:

    testUserInterface => to build all components for interface.


    testSearch => inherits interface from testUserInterface and build event action when user clicks on button start and button exit.


    PhotoFinder => get connection to Flickr.

    Link to view my code of PhotoFinder


    PhotoPanel => displays photos on this panel.

    Link to view my code of PhotoPanel


    When I select sub-menu "Search Photos" from class testUserInterface, a search panel is displayed with textfield and 2 buttons, start and exit.


    However, a problem occurs when I clicks start button (after entering a specific keyword).
    all photos which relates to the keyword is not shown.
    and I got problem with sub-menu instead.



    Please help me out with the problem, it drives me crazy (TT)


  2. #2
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    Question Java and Flickr - Help with Inheritance between Main Class and sub-class

    This section is duplicated, please can admin delete this section for me please.

  3. #3
    Super Moderator Norm's Avatar
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    Default Re: Java and Flickr - Help with Inheritance between Main Class and sub-class

    The two threads have been merged.

    I got problem with sub-menu instead in line 180.
    Please copy the full text of the error message and paste it here.
    Not images, the lines of text.
    Also post the code where the error happens.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Java and Flickr - Help with Inheritance between Main Class and sub-class

    The errors are shown below:

    Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: javax.swing.JButton cannot be cast to javax.swing.JMenuItem
    at testUserInterface.actionPerformed(testUserInterfac e.java:180)
    at javax.swing.AbstractButton.fireActionPerformed(Abs tractButton.java:2018)
    at javax.swing.AbstractButton$Handler.actionPerformed (AbstractButton.java:2341)
    at javax.swing.DefaultButtonModel.fireActionPerformed (DefaultButtonModel.java:402)
    at javax.swing.DefaultButtonModel.setPressed(DefaultB uttonModel.java:259)
    at javax.swing.plaf.basic.BasicButtonListener.mouseRe leased(BasicButtonListener.java:252)
    at java.awt.Component.processMouseEvent(Component.jav a:6505)
    at javax.swing.JComponent.processMouseEvent(JComponen t.java:3321)
    at java.awt.Component.processEvent(Component.java:627 0)
    at java.awt.Container.processEvent(Container.java:222 9)
    at java.awt.Component.dispatchEventImpl(Component.jav a:4861)
    at java.awt.Container.dispatchEventImpl(Container.jav a:2287)
    at java.awt.Component.dispatchEvent(Component.java:46 87)
    at java.awt.LightweightDispatcher.retargetMouseEvent( Container.java:4832)
    at java.awt.LightweightDispatcher.processMouseEvent(C ontainer.java:4492)
    at java.awt.LightweightDispatcher.dispatchEvent(Conta iner.java:4422)
    at java.awt.Container.dispatchEventImpl(Container.jav a:2273)
    at java.awt.Window.dispatchEventImpl(Window.java:2719 )
    at java.awt.Component.dispatchEvent(Component.java:46 87)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.j ava:723)
    at java.awt.EventQueue.access$200(EventQueue.java:103 )
    at java.awt.EventQueue$3.run(EventQueue.java:682)
    at java.awt.EventQueue$3.run(EventQueue.java:680)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPri vilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$1.doIntersectionPri vilege(ProtectionDomain.java:87)
    at java.awt.EventQueue$4.run(EventQueue.java:696)
    at java.awt.EventQueue$4.run(EventQueue.java:694)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPri vilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java: 693)
    at java.awt.EventDispatchThread.pumpOneEventForFilter s(EventDispatchThread.java:244)
    at java.awt.EventDispatchThread.pumpEventsForFilter(E ventDispatchThread.java:163)
    at java.awt.EventDispatchThread.pumpEventsForHierarch y(EventDispatchThread.java:151)
    at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:147)
    at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:139)
    at java.awt.EventDispatchThread.run(EventDispatchThre ad.java:97)

  5. #5
    Super Moderator Norm's Avatar
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    Default Re: Java and Flickr - Help with Inheritance between Main Class and sub-class

    Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: javax.swing.JButton cannot be cast to javax.swing.JMenuItem
    at testUserInterface.actionPerformed(testUserInterfac e.java:180)
    At line 180 the code is trying to cast a JButton object to a JMenuItem.
    Check the logic at that line to see why it is doing this invalid cast.

    Is the same listener code used by more than one component?

    Without seeing the code it is hard to recommend a fix.

    --- Update ---

    Also posted at Java and Flickr - Help with Inheritance between Main Class and sub-class - Dev Shed
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Java and Flickr - Help with Inheritance between Main Class and sub-class

    I found a way to solve the problem with instanceof

    searchk.jpg

    then the error will never be blown up again (^^)

    searchnm.jpg

    However, I face with another problem is, after entering a keyword then click "start" button, no photos are shown up.

    I think I got a problem with panel in testSearch.

  7. #7
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    Default Re: Java and Flickr - Help with Inheritance between Main Class and sub-class

    Sorry, I can not see the code from here and have no idea what the problem is.

    If you want help you'll have to post code that will compile, execute and show the problem.

    BTW Posting images of code is a waste of time.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Java and Flickr - Help with Inheritance between Main Class and sub-class


  9. #9
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    Default Re: Java and Flickr - Help with Inheritance between Main Class and sub-class

    Thanks to copeg, I also got notices from other Moderators in different java 4rums when I return today.
    I only want to archive the answer for my problem much faster but Cross Posting rules let me know more what I can do.

    thanks to Norm, a new error that I get now is java.lang.StackOverflowError

    my aim is to pass txtSearch as an JTextField object from testUserInterface to testSearch.
    However, I got an error saying

    PHP Code:
    java.lang.StackOverflowError
            at java
    .awt.Insets.<init>(Insets.java:103)
            
    at sun.awt.windows.WToolkit.getScreenInsets(Native Method)
            
    at sun.awt.windows.WToolkit.getScreenInsets(WToolkit.java:567)
            
    at java.awt.Window.init(Window.java:498)
            
    at java.awt.Window.<init>(Window.java:536)
            
    at java.awt.Frame.<init>(Frame.java:420)
            
    at java.awt.Frame.<init>(Frame.java:385)
            
    at javax.swing.JFrame.<init>(JFrame.java:180)
            
    at testUserInterface.<init>(testUserInterface.java:65)
            
    at testSearch.<init>(testSearch.java:29)
            
    at testUserInterface.<init>(testUserInterface.java:168


    I posted a question in java-forums.org and waiting for helps.

  10. #10
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    Default Re: Java and Flickr - Help with Inheritance between Main Class and sub-class

    at testUserInterface.<init>(testUserInterface.java:65 )
    Is there a recursive call starting at line 65?

    Can you post the code that gets the error?
    If you don't understand my answer, don't ignore it, ask a question.

  11. #11
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    Default Re: Java and Flickr - Help with Inheritance between Main Class and sub-class

    Thanks to Norm, I got advise from Fubarable in Java Programming Forum - The Front Page

    I re-build my classes again.

    thanks a lot for your help.

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