📄 popuplistener.java
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import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JPopupMenu;
class PopupListener extends MouseAdapter{
JPopupMenu popup;
PopupListener(JPopupMenu popup){
super();
this.popup=popup;
}
public void mousePressed(MouseEvent e){
maybeShowPopup(e);
}
public void mouseReleased (MouseEvent e){
maybeShowPopup(e);
}
private void maybeShowPopup(MouseEvent e){
if(e.isPopupTrigger()){
// 如果鼠标右键是弹出式菜单则在当前鼠标位置显示该菜单
popup.show(e.getComponent(),e.getX(),e.getY());
}
}
}
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