problem with using JNI with AWT events.

i am working in Fedora core . i a trying to run the following code, 
which uses some JNI functions of class ParallelTest. 

Problem is that all the code works, but when the native code is called
in the key event functions, then i got the following exception  

Local Time = Sun Apr 11 12:28:28 2004
Elapsed Time = 6
#
# The exception above was detected in native code outside the VM
#
# Java VM: Java HotSpot(TM) Client VM (1.4.2-b28 mixed mode)
#
# An error report file has been saved as hs_err_pid22771.log.
# Please refer to the file for further information.
#
Aborted


The code in which the following error occurs is

public class ParallelTest1 extends JFrame implements KeyListener{

private static final int[] stepData={1,2,4,8};
private int position=0;
private ParallelTest test=null;

// main program
	public static void main(String[] args) {
		//int x=5;
//		int temp;
		ParallelTest1 test1=new ParallelTest1();
//		temp=test.setPermissions(LPTDataPort,3,1);
//		test.setModeParallel(WRITE_MODE,LPTControlPort);
//		System.out.println("value returned by ioperm function = " +
Integer.toString(temp));
//
//		if(temp==0){
//			for(int i=0;i<8;i++){
//				try {
//					Thread.sleep(500);
//				}
//				catch(InterruptedException e){
//					System.out.println("Error : while sleeping " + e.toString());
//				}
//			test.setModeParallel(WRITE_MODE,LPTControlPort);
//			test.sendParallel(stepData[i],LPTDataPort);
//			test.setModeParallel(READ_MODE,LPTControlPort);
//			temp=test.readParallel(LPTDataPort);
//			System.out.println("value read from port = " +
Integer.toString(temp));
//			}//for ends
//
//		}//if ends
test1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
test1.show();
	}//main ends

public ParallelTest1(){
	addKeyListener(this);
     int temp;
     //System.loadLibrary("CJParallelInterface");
        test=new ParallelTest();
		temp=test.setPermissions(ParallelPortUtil.LPTDataPort,3,1);
	
test.setModeParallel(ParallelPortUtil.WRITE_MODE,ParallelPortUtil.LPTControlPort);
		System.out.println("value returned by ioperm function = " +
Integer.toString(temp));

		if(temp!=0){
			System.out.println("Error : No permision granted for ports");
			System.exit(0);
		}
		try{
		test.sendParallel(0,ParallelPortUtil.LPTDataPort);
		Thread.sleep(300);
		test.sendParallel(1,ParallelPortUtil.LPTDataPort);
		Thread.sleep(300);
		test.sendParallel(2,ParallelPortUtil.LPTDataPort);
		}
		catch(InterruptedException e){
			System.out.println("Error");
		}
	//super.show();
}
	public void keyPressed(KeyEvent event){
		int keyCode=event.getKeyCode();
		if(keyCode==KeyEvent.VK_LEFT){
		
test.sendParallel(stepData[position--],ParallelPortUtil.LPTDataPort);
			position=(position+4)%4;
			System.out.println(" Key Pressed is left and outValue = "
+stepData[position] );
		}
		if(keyCode==KeyEvent.VK_RIGHT){
		
test.sendParallel(stepData[position++],ParallelPortUtil.LPTDataPort);
			position=position%4;
			System.out.println("Key Pressed is right and outValue = "+
stepData[position]);
		}
		if(keyCode==KeyEvent.VK_END){
			System.exit(0);
		}
	}

	public void keyReleased(KeyEvent event){
}
public void keyTyped(KeyEvent event){
}


}


when the constructor gets executed then test.sendParallel is working 
fine, but when the same code runs under key event then it exits. why??


please help if anyone could, i hope there will be number of.

i send all my thanks in advance .

=====
Arundeep Singh,
M.Tech (IS), IIIT Allahabad, 
U.P, India. 
ph: 09415262466, 09417066713
http://www.i-cognition.com

Don't take life seriously, as you can't come out of it alive.

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