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No -- as you only gave a condensed version of the error message you received. (for one thing)

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You might want to show what you found for others to see. However, the following should be sufficient: <Code Omitted>

it worked! thank you so much :-)

Can you add your site to the list as well? Are you trying to run applets locally by opening a web page on your local machine?

Line 28 in your world subclass above is what is setting the rate of production of vehicles. Using 'Math.random()*5', the average value would be two. That means you will produce on average one car every other act cycle. At normal scenario speeds of between 50 and 60 cycles per second, you would be creating 25 to 30 cars per second, on average. Change the '5' to a much larger value. You can also add a constant value to it (for example: 'Math.random()*60+25').

Thank you very much! :)

Or if you want help here, explain what it is that you want that line of code to do.

First, the value of the parameter of 'getRandomNumber' must be a positive number. I do not see where 's' nor 'l' are set to any value other than zero. Second, only the values of 's' and 'l' are taken when used as part or all of a parameter expression. Finally, and I think this goes along with the previous statement, using 'getRandomNumber' returns a value that must be used either in an expression or assigned to a variable to be used later; otherwise, the value is immediately lost. In other words, lines 17 and 18 do absolutely nothing above, even if the value of 's' or 'l' was a positive n

Yes, that works just as I want it. Thanks again

The easiest way is probably just to read the file in and then re-write the file without those equities.

I would suggest that you ask specific questions about things that you don't understand.

Whether you are having the bullet follow the actor with or without turning toward it is done exactly the same way. The only difference is WHEN you turn toward the other actor. To follow turning towards the other actor, you would continuously, via the 'act' method', turn toward the other actor. To follow without turning towards the other actor, you would only once turn toward the other actor, via the 'addedToWorld' method or (and this next way is the one I prefer) in the class of the enemy after creating the bullet and adding it into the world.