Ok so assuming you are on 12.) Generalizations in Introduction to Java and you are on Step 2 dealing with "Set the boolean variable isComplete to true." I can help you out!
Basically, you do exactly what it tells you to do. First, set the boolean variable so we type out boolean. Second, set the boolean variable isComplete so we set our boolean to isComplete so boolean isComplete. Then we to true it so we equal our previous statement to true. So we will end up with boolean isComplete = true; (of course don't forget our semi colon punctuation at the end.