从其父JMenu获取JMenuItem的位置

Is it possible to get the position/index of the JMenuItem inside its JMenu?

是否有可能在其JMenu中获取JMenuItem的位置/索引？

For instance, I have a JMenu called "Search" and 3 JMenuItems called "Find", "Count" and "Replace", and I have just 1 class manager to manage all the 3 JMenuItems. Hence I use the getSource() method to obtain which of the JMenuItems are clicked, so that I can pass the index of the JMenuItem to the constructor of another class.

例如，我有一个名为“Search”的JMenu和3个名为“Find”，“Count”和“Replace”的JMenuItems，我只有1个类管理器来管理所有3个JMenuItems。因此，我使用getSource（）方法来获取单击了哪个JMenuItem，以便我可以将JMenuItem的索引传递给另一个类的构造函数。

My problem is if wanted to add more JMenuItems or to change the order of the JMenuItems, I would have to change the indexes passed to the constructor of the other class.

我的问题是如果想要添加更多JMenuItems或更改JMenuItems的顺序，我将不得不更改传递给另一个类的构造函数的索引。

Thank you!

谢谢！

2 个解决方案

#1

Use JMenuBar#getMenu() and JMenu#getMenuComponent() methods to get all the JMenu and JMenuItem.

使用JMenuBar＃getMenu（）和JMenu＃getMenuComponent（）方法获取所有JMenu和JMenuItem。

Just iterate all the JMenuItem of any JMenu and get the index of desired JMenuItem.

只需迭代任何JMenu的所有JMenuItem并获取所需JMenuItem的索引。

sample program:

示例程序：

JMenuBar menubar1 = getJMenuBar();
for (int i = 0; i < menubar1.getMenuCount(); i++) {
    JMenu menu1 = menubar1.getMenu(i);
    System.out.println("Menu:" + menu1.getText());
    for (int j = 0; j < menu1.getMenuComponentCount(); j++) {
        java.awt.Component comp = menu1.getMenuComponent(j);
        if (comp instanceof JMenuItem) {
            JMenuItem menuItem1 = (JMenuItem) comp;
            System.out.println("MenuItem:" + menuItem1.getText());
        }
    }
}

#2

Get position/index of JMenuItem from JMenu

---

Creating a sample nested context menu

创建示例嵌套上下文菜单

JPopupMenu popup = new JPopupMenu();
popup.setName("popup");
JMenu jMenu= new JMenu("menu");
jMenu.setName("menu");
JMenuItem menuItem1 = new JMenuItem("sub1");
jMenu.add(menuItem1);
menuItem1.addActionListener(this);
popup.add(jMenu);

Getting the position/index of JMenuItem from JMenu

从JMenu获取JMenuItem的位置/索引

@Override
public void actionPerformed(ActionEvent e) {
    JMenuItem source = (JMenuItem)(e.getSource());
    try{
        JMenuItem menuItem = (JMenuItem) e.getSource(); 
        JPopupMenu popupMenu = (JPopupMenu) menuItem.getParent(); 
        Component invoker = popupMenu.getInvoker();  
        // Print MenuItem index against the total number of items
        System.out.println(popupMenu.getComponentZOrder(menuItem)
        +"/"+popupMenu.getComponentCount());
    }catch(Exception ex){
        ex.printStackTrace();
    }
}