java 如何向 JTextField 添加弹出菜单
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How to add a popup menu to a JTextField
提问by artaxerxe
Can anybody explain me how to add a popup menu at a JtextField? I managed to add a JPopupMenu:
有人能解释一下如何在 JtextField 中添加弹出菜单吗？我设法添加了一个 JPopupMenu：
JPopupMenu popup = new JPopupMenu();
popup.add("m");
popup.add("n");
JTextField textField = new JTextField();
textField.add(popup);
.....
.....
But when i roll the mouse over "popup", nothing is happening (i need to select an item from popup).
但是当我将鼠标滚动到“弹出窗口”上时，什么也没有发生（我需要从弹出窗口中选择一个项目）。
回答by austen
From your comment, it sounds like you are trying to display a sub-menu in the popup that appears over your JTextField.
从您的评论来看，您似乎正在尝试在 JTextField 上方出现的弹出窗口中显示子菜单。
// 1. Let's add the initial popup to the text field.
JTextField textField = new JTextField();
JPopupMenu popup = new JPopupMenu();
textField.add(popup);
textField.setComponentPopupMenu(popup);
// 2. Let's create a sub-menu that "expands"
JMenu subMenu = new JMenu("m");
subMenu.add("m1");
subMenu.add("m2");
// 3. Finally, add the sub-menu and item to the popup
popup.add(subMenu);
popup.add("n");
Hopefully I answered the question you are trying to ask. If not could you explain a bit more on what you are trying to accomplish?
希望我回答了您要问的问题。如果不是，你能解释一下你想要完成的事情吗？
回答by Varun
回答by Boris Pavlovi?
Maybe editable combo boxcould suit you better.
也许可编辑的组合框更适合您。
回答by camickr
Read the JComponent APIfor the setComponentPopupMenu()method.
阅读该方法的 JComponent APIsetComponentPopupMenu()。
