Are you certain the listener is not added twice ? The following SSCCE works as expected on my machine (OS X, JDK7)
import javax.swing.JFrame;
import javax.swing.JSlider;
import javax.swing.WindowConstants;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.EventQueue;
public class SliderTest {
public static void main( String[] args ) {
EventQueue.invokeLater( new Runnable() {
@Override
public void run() {
JFrame frame = new JFrame( );
final JSlider slider = new JSlider( 0, 100 );
frame.add( slider );
slider.addChangeListener( new ChangeListener() {
@Override
public void stateChanged( ChangeEvent e ) {
if ( !( slider.getValueIsAdjusting() ) ){
System.out.println( "SliderTest.stateChanged" );
}
}
} );
frame.pack();
frame.setVisible( true );
frame.setDefaultCloseOperation( WindowConstants.EXIT_ON_CLOSE );
}
} );
}
}