PopupCombo Sample : ComboBox « Swing JFC « Java

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Java » Swing JFC » ComboBoxScreenshots 
PopupCombo Sample
PopupCombo Sample
 
import java.awt.BorderLayout;
import java.awt.Container;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.plaf.ComboBoxUI;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.basic.BasicArrowButton;
import javax.swing.plaf.basic.BasicComboBoxUI;

public class PopupComboSample {
  public static void main(String args[]) {
    String labels[] "A""B""C""D","E""F""G""H","I""J" };
    JFrame frame = new JFrame("Popup JComboBox");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container contentPane = frame.getContentPane();

    JComboBox comboBox = new JComboBox(labels);
    comboBox.setMaximumRowCount(5);
    comboBox.setUI((ComboBoxUIMyComboBoxUI.createUI(comboBox));
    contentPane.add(comboBox, BorderLayout.NORTH);

    frame.setSize(300200);
    frame.setVisible(true);
    comboBox.showPopup();
  }

  static class MyComboBoxUI extends BasicComboBoxUI {
    public static ComponentUI createUI(JComponent c) {
      return new MyComboBoxUI();
    }

    protected JButton createArrowButton() {
      JButton button = new BasicArrowButton(BasicArrowButton.EAST);
      return button;
    }
  }
}

           
         
  
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