Menu déroulant sans JMenuBar

Question

est-il un moyen de mettre en œuvre le bouton déroulant en Java, mais sans mettre en œuvre JMenuBar? Je dois importer un bouton avec menu contextuel. Comment puis je faire ça?

Answer 1

Comme @DavidKroukamp a déclaré, un JPopupMenu devrait faire l'affaire.

Answer 2

import java.awt.event.ActionEvent; 
    import java.awt.event.ActionListener; 

    import javax.swing.JPopupMenu; 
    import javax.swing.JToggleButton; 
    import javax.swing.event.PopupMenuEvent; 
    import javax.swing.event.PopupMenuListener; 

    public class MenuButton extends JToggleButton { 

     JPopupMenu popup; 

     public MenuButton(String name, JPopupMenu menu) { 
      super(name); 
      this.popup = menu; 
      addActionListener(new ActionListener() { 
       @Override 
       public void actionPerformed(ActionEvent ev) { 
        JToggleButton b = MenuButton.this; 
        if (b.isSelected()) { 
         popup.show(b, 0, b.getBounds().height); 
        } else { 
         popup.setVisible(false); 
        } 
       } 
      }); 
      popup.addPopupMenuListener(new PopupMenuListener() { 
       @Override 
       public void popupMenuWillBecomeVisible(PopupMenuEvent e) {} 
       @Override 
       public void popupMenuWillBecomeInvisible(PopupMenuEvent e) { 
        MenuButton.this.setSelected(false); 
       } 
       @Override 
       public void popupMenuCanceled(PopupMenuEvent e) {} 
      }); 
     } 
    }