JComboBox with Horizontal ScrollBar and Substance L&F

Sometimes we need ad Horizontal Scrollbar in JComboBox in JAVA. Due to the long text we need to display in ComboBox and we are having a limits size for same to display.

So, here is solution.

Instead of creating JComboBox now you need to create the object of following class and it will solve your problem.

Note: Here example with Substance L&F. you not need to use that if you not using Substance L&F. so remove the imports and a method named createArrowButton() from following code..

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JScrollPane;
import javax.swing.ScrollPaneConstants;
import javax.swing.plaf.basic.BasicComboBoxUI;
import javax.swing.plaf.basic.BasicComboPopup;
import javax.swing.plaf.basic.ComboPopup;

// Only for Substance L&F else no need to include following imports..
import org.jvnet.substance.SubstanceComboBoxUI;
import org.jvnet.substance.combo.SubstanceComboBoxButton;
import org.jvnet.substance.theme.SubstanceTheme;
import org.jvnet.substance.utils.SubstanceCoreUtilities;

/**
*
* @author Shirin, khushal
*/
public class HScrollJComboBox extends JComboBox {

public HScrollJComboBox() {
super();
setUI(new HScrollJComboBoxUI());
}//end of default constructor
public class HScrollJComboBoxUI extends BasicComboBoxUI {

/**
* If you are using the Substance L&F than and only than use following methods
* else your comboBox will Work fine without following method.
*
* @return JButton
*/
@Override
protected JButton createArrowButton() {

SubstanceTheme theme = comboBox.isEnabled() ? SubstanceCoreUtilities.getActiveTheme(comboBox, true) : SubstanceCoreUtilities.getDefaultTheme(comboBox, true);
return new SubstanceComboBoxButton(comboBox, SubstanceComboBoxUI.getArrowIcon(theme, SubstanceCoreUtilities.getPopupFlyoutOrientation(comboBox)));

}

/**
*
* @return ComboPopup with Horizontal Scrollbar and
* Vertical whenever it needed
*/
@Override
protected ComboPopup createPopup() {

BasicComboPopup popup = new BasicComboPopup(comboBox) {

protected JScrollPane createScroller() {
return new JScrollPane(list, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
}//end of method createScroller
};
return popup;
}//end of method createPopup
}//end of inner class myComboUI
}