Java BoundedRangeModel .setExtent (int newExtent)

void setExtent(int newExtent)

import java.awt.BorderLayout;
/*from ww w  .ja  va 2s . co  m*/
import javax.swing.BoundedRangeModel;
import javax.swing.JFrame;
import javax.swing.JProgressBar;
import javax.swing.JScrollBar;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class Main {
  public static void main(String args[]) throws Exception {
    ChangeListener changeListener = new BoundedChangeListener();
    JScrollBar anotherJScrollBar = new JScrollBar(JScrollBar.HORIZONTAL);
    BoundedRangeModel model = anotherJScrollBar.getModel();
    model.addChangeListener(changeListener);
    model.setExtent(10);
    
    JFrame frame = new JFrame("ScrollBars R Us");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(anotherJScrollBar, BorderLayout.NORTH);

    frame.setSize(300, 200);
    frame.setVisible(true);
  }

}
class BoundedChangeListener implements ChangeListener {
  public void stateChanged(ChangeEvent changeEvent) {
    Object source = changeEvent.getSource();
    if (source instanceof BoundedRangeModel) {
      BoundedRangeModel aModel = (BoundedRangeModel) source;
      if (!aModel.getValueIsAdjusting()) {
        System.out.println("Changed: " + aModel.getValue());
      }
    } else if (source instanceof JSlider) {
      JSlider theJSlider = (JSlider) source;
      if (!theJSlider.getValueIsAdjusting()) {
        System.out.println("Slider changed: " + theJSlider.getValue());
      }
    } else if (source instanceof JProgressBar) {
      JProgressBar theJProgressBar = (JProgressBar) source;
      System.out.println("ProgressBar changed: " + theJProgressBar.getValue());
    } else {
      System.out.println("Something changed: " + source);
    }
  }
}