如何禁用 java swing 菜单项？
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How do I disable java swing menu items?
提问by kleopatra
I used the awt to make a menu and populated that menu with several items. How do I "disable" the menu items?
我使用 awt 制作了一个菜单，并用几个项目填充了该菜单。如何“禁用”菜单项？
回答by Prince John Wesley
menuItemInstance.setEnabled(false);
回答by kleopatra
can't resist to grumble a bit about the other answers: changing enabled state of the menuItem itself can be done, so they are technically correct. Nevertheless, it's not a good idea most of the time.
忍不住对其他答案发牢骚：可以更改 menuItem 本身的启用状态，因此它们在技术上是正确的。然而，大多数时候这不是一个好主意。
Managing enablement state can get quite complex in anything but the most simple environments. Typically, a dedicated state model is needed. Target items of that state model should be data-like (as opposed to view-like). The ideal (because it was designed for it :) target item for menuItems (or other buttons) is the Action.
除了最简单的环境之外，管理启用状态在任何情况下都会变得非常复杂。通常，需要专用的状态模型。该状态模型的目标项应该是类似数据的（而不是类似视图）。menuItems（或其他按钮）的理想（因为它是为它设计的：）目标项目是Action.
Short version: fill menus with Actions and then manage the enablement of the action instead of the component.
简短版本：用Actions填充菜单，然后管理操作而不是组件的启用。
