committedCharacterCount==-1 does not throw IllegalArgumentException

committedCharacter count must be positive value or zero, so the negative
value on InputMethodEvent construction should raise IllegalArgument
Exception.

Problem on Windows 95 and Solaris

Compile and run the attached test code.
---------------------------------------------------------------------

import java.awt.event.InputMethodEvent;
import java.awt.Canvas;

class test
{
public static void main( String args[] )
{
boolean exceptionCaught = false;
InputMethodEvent ime;
Canvas c = new Canvas();

try
{

ime = new InputMethodEvent( c,
InputMethodEvent.INPUT_METHOD_TEXT_CHANGED,
null, -1, null, null );
}
catch ( IllegalArgumentException iae )
{
exceptionCaught = true;
}

if ( exceptionCaught )
System.out.println( "passed." );
else
System.out.println( "failed. IllegalArgumentException is expected" );
}
}