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  1. #1
    Registered User
    Join Date
    Jan 2007
    Posts
    20

    Question ClassCast Exception with DirectGraphics

    hi everyone...

    here i am with another problem.....

    i am running my project with apache-ant-1.6.2 and using Series 60 3rd edition emulator.
    the project compiles fine. but gives following error at run time..
    runnokia60:

    [exec] java.lang.ClassCastException
    [exec] at com.nokia.mid.ui.DirectUtils.getDirectGraphics(+1)
    [exec] at GameImage.<init>(+75)
    [exec] at GameShell.initializeGame(+14)
    [exec] at GameShell.keyMenuState(+204)
    [exec] at GameShell.keyPressed(+45)
    [exec] at javax.microedition.lcdui.Canvas.callKeyPressed(+19)
    [exec] at javax.microedition.lcdui.Display$DisplayAccessor.keyEvent(+198)
    [exec] at javax.microedition.lcdui.Display$DisplayManagerImpl.keyEvent
    ( +11)
    [exec] at com.nokia.phone.sdk.concept.event.CoreEventHandler.keyEvent
    (+95)
    [exec] at com.nokia.phone.sdk.concept.event.CoreEventHandler$QueuedEventHandler.
    run (+123)


    I checked the code. it gives error at the run time while executing this line.
    I have imported DirectGraphics and DirectUtils in file.

    DirectUtils.getDirectGraphics(g).getPixels(pi, 0, dx, 0, 0, dx, dy, 4444);


    please help me..

    Regards,
    Vijay.

  2. #2
    Registered User
    Join Date
    Jan 2007
    Posts
    20

    Re: ClassCast Exception with DirectGraphics

    i tried this too..

    DirectGraphics dg = DirectUtils.getDirectGraphics(g);
    dg.getPixels(pi, 0, dx, 0, 0, dx, dy, 4444);

    but the result is same.......

  3. #3
    Super Contributor
    Join Date
    Apr 2003
    Location
    USA, CA
    Posts
    7,191

    Re: ClassCast Exception with DirectGraphics

    What is the type of "pi" and the rest of the variables in the parameter list?

    Hartti

  4. #4
    Registered User
    Join Date
    Jan 2007
    Posts
    20

    Re: ClassCast Exception with DirectGraphics

    all variables are of int type.
    here is the definition and the piece of the code for initializing them

    private int pi[];
    int dx;
    int dy;

    .............................
    dx = img.getWidth();
    dy = img.getHeight();
    int dxy = dx * dy;
    Graphics g = Image.createImage(dx, dy).getGraphics();
    pi = new int[dxy];

  5. #5
    Super Contributor
    Join Date
    Mar 2003
    Location
    Israel
    Posts
    2,280

    Re: ClassCast Exception with DirectGraphics

    The 4444 format uses a short (16 bit) array.

    shmoove

  6. #6
    Registered User
    Join Date
    Jan 2007
    Posts
    20

    Unhappy Re: ClassCast Exception with DirectGraphics

    thanks shmoove
    i corrected it.
    but as i said
    .... DirectGraphics dg = DirectUtils.getDirectGraphics(g);
    this line is giving problems.
    when i comment getPixels() line still it gives error....!
    i guess i am mistaking somewhere ..
    Here is my build.xml code

    <!-- ............ Build: NOKIA 60 MIDP.............. -->
    <target name="buildnokia60" depends="init">
    <property name="wtk.home" value="C:\WTK22"/>
    <property name="name" value="Commando"/>
    <property name="dev" value="nokia60"/>
    <property name="appres" value="NokiaRes/60"/>
    <property name="path" value="NokiaBuild/60/"/>
    <property name="midplib" value="C:\midpapi.zip"/>
    <antcall target="build"/>
    </target>
    <!--..............Run nokia...................-->
    <!--.....Series_60_MIDP_Concept_SDK_Beta_0_3_Nokia_edition......-->
    <target name="runnokia60" depends="buildnokia60">
    <exec executable="C:\WTK22\bin\emulator.exe">
    <arg line="-classpath ${path}/Commando.jar" />
    <arg line="-Xdescriptor:${path}/Commando.jad"/>
    <arg line="-Xdevice:Series_60_MIDP_Concept_SDK_Beta_0_3_Nokia_edition" />
    </exec>
    </target>
    <!--....................END NOKIA 60 MIDP1.................................-->

    in midplib classpath i have given the c:\midpapi.zip.
    In this archive i have added all apis including NOKIA UI.
    For nokia ui i have added five class files to the midapi.zip archive manually.

    DeviceControl.class
    DirectGraphics.class
    DirectGraphicsAccess.class
    DirectUtils.class
    FullCanvas.class

    Temporarily i am running project in SonyK700 emulator.
    But i need to use NOKIA emulator.

    Please help me

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