To set the keyboard shortcuts follow this procedure.
On Windows, select Tools > Options.
On Mac OS, select Java ME SDK > Preferences.
As you press the key sequence, the correct syntax for that sequence automatically appears in the text field. For example, if you simultaneously hold down the Alt key, the Control key, and the J key, "Alt+Ctrl+J" appears.
To use a Backspace or Tab key in the shortcut, click the ellipsis button (...) and select the desired key. You can only specify a keyboard shortcut that is not being used by another command.