gstreamer error

[tenda21]

good morning everyone 

I'm trying to use a java applet to use gstreamer, but I got the following
error:

 java -jar MyMediaPlayer.jar /home/Thour\ game\ .mp4 
Exception in thread "main" java.lang.AbstractMethodError:
com.sun.jna.Structure.getFieldOrder()Ljava/util/List;
	at com.sun.jna.Structure.fieldOrder(Structure.java:884)
	at com.sun.jna.Structure.getFields(Structure.java:910)
	at com.sun.jna.Structure.deriveLayout(Structure.java:1058)
	at com.sun.jna.Structure.calculateSize(Structure.java:982)
	at com.sun.jna.Structure.calculateSize(Structure.java:949)
	at com.sun.jna.Structure.allocateMemory(Structure.java:375)
	at com.sun.jna.Structure.<init>(Structure.java:184)
	at com.sun.jna.Structure.<init>(Structure.java:172)
	at com.sun.jna.Structure.<init>(Structure.java:159)
	at com.sun.jna.Structure.<init>(Structure.java:151)
	at
org.gstreamer.lowlevel.GObjectAPI$GTypeInstance.<init>(GObjectAPI.java:113)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
	at java.lang.Class.newInstance(Class.java:433)
	at com.sun.jna.Structure.newInstance(Structure.java:1651)
	at com.sun.jna.Structure.newInstance(Structure.java:1637)
	at com.sun.jna.Structure.size(Structure.java:966)
	at com.sun.jna.Native.getNativeSize(Native.java:1076)
	at com.sun.jna.Structure.getNativeSize(Structure.java:1943)
	at com.sun.jna.Structure.getNativeSize(Structure.java:1936)
	at com.sun.jna.Structure.validateField(Structure.java:1034)
	at com.sun.jna.Structure.validateFields(Structure.java:1048)
	at com.sun.jna.Structure.<init>(Structure.java:179)
	at com.sun.jna.Structure.<init>(Structure.java:172)
	at com.sun.jna.Structure.<init>(Structure.java:159)
	at com.sun.jna.Structure.<init>(Structure.java:151)
	at org.gstreamer.lowlevel.GObjectAPI$GParamSpec.<init>(GObjectAPI.java:394)
	at org.gstreamer.GObject.findProperty(GObject.java:631)
	at org.gstreamer.GObject.set(GObject.java:85)
	at org.gstreamer.elements.PlayBin.setElement(PlayBin.java:341)
	at org.gstreamer.elements.PlayBin.setVideoSink(PlayBin.java:319)
	at
ca.tylerburton.mymediaplayer.MyMediaPlayer.initGstreamer(MyMediaPlayer.java:210)
	at
ca.tylerburton.mymediaplayer.MyMediaPlayer.<init>(MyMediaPlayer.java:174)
	at ca.tylerburton.mymediaplayer.Main.main(Main.java:33)

can someone help me





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