Zekr Audio Problem Solved

If you have problem to control volume of your Zekr audio player which result with error for example with this message,

net.sf.zekr.engine.audio.PlayerException: javazoom.jlgui.basicplayer.BasicPlayerException: Gain control not supported
    at net.sf.zekr.engine.audio.DefaultPlayerController.setGain(DefaultPlayerController.java:193)
    at net.sf.zekr.engine.audio.DefaultPlayerController.setVolume(DefaultPlayerController.java:249)

    at net.sf.zekr.engine.audio.ui.AudioPlayerForm$20.mouseUp(AudioPlayerForm.java:831)
    at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:220)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1276)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3562)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3186)
    at net.sf.zekr.ui.BaseForm.loopEver(BaseForm.java:36)
    at net.sf.zekr.ZekrMain.startZekr(ZekrMain.java:63)    

    at net.sf.zekr.ZekrMain.main(ZekrMain.java:94)
Caused by: javazoom.jlgui.basicplayer.BasicPlayerException: Gain control not supported
    at javazoom.jlgui.basicplayer.BasicPlayer.setGain(Unknown Source)
    at net.sf.zekr.engine.audio.DefaultPlayerController.setGain(DefaultPlayerController.java:191)
    ... 10 more

Screenshot of the error message,
In this case also, you will unable to close your Zekr normally. It will result with force quit require.
To clear this problem, we need to install Oracle JDK 7.
To install please follow this step,

First of all add this repo,

sudo add-apt-repository ppa:webupd8team/java

then update,

sudo apt-get update

then install java,

sudo apt-get install oracle-java7-installer

after completed you can check java version using this command,

java -version

the latest version for now is,

java version "1.7.0_21"
I hope now you can control you Zekr audio player volume up or down without error.

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