Do not create new code to not do what you do not want to do. Put a condition on the code that does what you do not want to do. In other words, instead of 'do not move if intersecting a tent', use 'move only if not intersecting a tent'. You probably already have movement code in your class. Just restrict when it can execute that code.

Do you mean something like this?

In your code snippet above, you wrote: 'protected boolean' describes the accessibility and return type of the method and should not be included with the calling of the method. The line should simply be the following: which is equivalent to 'if (intersects(Tent.class) == true)' or, the opposite being: which is equivalent to 'if (intersects(Tent.class) == false)'.

Again, this: A boolean value, that which the 'intersects' method returns, is never null.

If I write Then I get a message incompatible types:java.lang.Class<Tent>cannot be converted to greenfoot Actor. But I saved the Tent as an Actor. Can you help me?

Looks like I continued with your bad (I was more concerned with the 'private boolean' part). 'Tent.class' is a reference to a class, not an Actor and the 'intersects' method requires an Actor object. You probably want to use the 'isTouching' method instead, which checks for any object of the given class (instead of a specific object):