Discussions

hey davmac, BigDecimal num1 = new BigDecimal("1000000000000000000000000000000000"); this code really worked... thanks.. and thanks also to all those who replied... appreciate it.. but i have one more thing, how to ask for user input for two numbers? and how to check if the user input is using decimals or just integers.. -thanks

Ahhhhh! I get it, thanks :D.

It's updated now (bear in mind though that that's only temporary, a nicer page is on its way!)

Well, it works for me. Greenfoot won't magically change your code so if it moved in the diagram then you must have made it "extends World" again (instead of "extends wereld").

Please read this and post again.

Ok:;D

Yeah, thanks.;) And yes they are german.;D

http://www.greenfoot.org/scenarios/574 The above might be helpful - it's mik's piano scenario but modified so it works using MIDI for the notes rather than sound files.

Just to clarify, getObjectInRange returns a list of actors in the given radius. You need to import java.util.List and think about how to get a specific actor out of that list.

If you want the cars to appear at different times, you need to add them separately during separate invocations of the act() method. That is: - once the middle position is reached, add one car and return; - the following few times act() is called, do nothing, to allow the first car to move away - then add another car - then wait a few more act() cycles - then add the final car For this to work you need to introduce state into your actor - that is, instance variables which keep track of what is happening. You could for instance have a counters which keeps track of how many cars need to

thanks

thank you andres!! do you mind giving me an example

Maybe a Greenfoot expert will correct me, but I don't think that Greenfoot automatically backs up your files. I think the only thing that you can do is try to rebuild your method. What did lookForFood() do? Did it look for food within a radius of x pixels? Did it just look at intersecting food particles? Tell us how it worked, so that we know how to rebuild it.

thanks