Swing 不带JMenuBar的下拉菜单
有没有一种方法可以在Java中实现下拉按钮,但不实现Swing 不带JMenuBar的下拉菜单,swing,button,drop-down-menu,popupmenu,jmenubar,Swing,Button,Drop Down Menu,Popupmenu,Jmenubar,有没有一种方法可以在Java中实现下拉按钮,但不实现JMenuBar? 我需要导入一个带有弹出菜单的按钮。我该怎么做呢?正如@DavidKroukamp所说的,一个JPOppMenu应该可以做到这一点。 import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JPopupMenu; import javax.swing.JToggleB
JMenuBar
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我需要导入一个带有弹出菜单的按钮。我该怎么做呢?正如@DavidKroukamp所说的,一个JPOppMenu应该可以做到这一点。
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) {}
});
}
}
为什么不在FocusGain/按钮上单击一个按钮,并在按钮下面显示一个JPopMenu?@DavidKroukamp,不知道你为什么不回答这个问题。。。