package edu.jiangxin.apktoolbox.swing.extend.autocomplete;
   
   import javax.swing.*;
   import javax.swing.plaf.basic.BasicComboBoxUI;
   import javax.swing.plaf.basic.BasicComboPopup;
   import javax.swing.plaf.basic.ComboPopup;
   
   class ScrollBasicComboBoxUI extends BasicComboBoxUI {
       @Override
      protected ComboPopup createPopup() {
          return new BasicComboPopup(comboBox) {
              private static final long serialVersionUID = 1L;
  
              @Override
              protected JScrollPane createScroller() {
                  return new JScrollPane(list, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
                          ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
              }
          };
      }
  
  }