Thread: 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)

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

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)

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.

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.

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.