When you use code completion in Java, you can finish selection from the suggestion list with an
exclamation
mark. So doing, the exclamation mark will be placed before a Boolean method or variable being completed,
thus
negating the whole expression.
To negate an expression
Start typing an expression, and press Ctrl+SpaceCommand Space.
In the suggestion list, select the desired part of the expression.
Press !! key. Your expression is completed with negation:
