NOT

The NOT operator in Java is this:     !     (exclaimation point.) The NOT operator changes true to false and false to true, as seen in the table. This may seem like a silly thing to do, but often it is useful. Sometimes it is more natural to express a condition in a particular way, but the program logic calls for the reverse of what you have written. Time for the NOT operator.

x	!x
true	false
false	true

Say that you are shopping for a new computer. You want more than 2000 MHz and more than 512 Meg of RAM. Here is a program fragment:

if (  ______(speed > 2000 && memory > 512)  )
  System.out.println("Reject this computer");
else
  System.out.println("Acceptable computer");

As it is written, the program is wrong.