I can find a bunch of info talking about mnemonics but nothing about what they are. Can someone help me here?
There are two ways to set the mnemonic for JMenuItem.
The mnemonic key is often pressed in combination with a modifier key such as the Alt key. The modifier key is platform-dependent; however, it is usually the Alt key. For example, suppose you set the C key as a mnemonic for a Close JButton. When you press Alt+C, the Close JButton is clicked.
From swing documentation:
Mnemonics offer a way to use the keyboard to navigate the menu hierarchy, increasing the accessibility of programs.
It's the underlined letter in menus, buttons, labels, tabs etc. Pressing the ALT-key and the underlined letter on the keyboard selects that menu item.
A mnemonic is a keyboard shortcut that allows you to access some menu item. It's an accessibility thing.
This tutorial is a good illustration.
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