Discussions

You cannot execute a non-static method without an object of that type (or, you cannot execute a non-static method with a class name). You need to get a reference of an object of that class and execute the method on that object. I am hoping you only have one Ship object in the world for the following code: <Code Omitted>Again, you must have one, and only one, ship in the world for this code. Otherwise, you need the following check: if (getWorld().getObjects(Ship.class).isEmpty()) Do not use the previous code

thanks mate, i figured i would add that because it whas a bit of hassle to press run to execute the program then press another button to start the game. thanks anyways, i just added the start() method in the world's constructor like you sed.

Glad you found it!

OMG thank you so much i was just looking to in depth and not right in front of me!!!!!!!!

We need to see any (and all) code related to adding and removing the actor to and from the world. That would include your world constructor (or 'prepare' method; or whatever code initially adds the actors to the world) and probably the Arrow class code, as I did not see anything to remove actors in the classes given above, First and foremost, copy/paste the exact error message you were getting (clear the terminal before running the scenario and copy the whole message).

Thanks

@Danpost: No, you didn't hurt my feelings at all. But rather I was attempting to express awe at your superior method in a humorous way, which didn't work out so well. :P

jahama, the UserInfo class can be used to store player-specific data which persists between sessions (page refresh etc). Take a look at the documentation for it.

Too late, the assignment was due @ 11:55. But this will probably be on the quiz tomorrow. Thanks

Thanks, it works. I made lastEnemyHit an int variable that increases as Hero makes contact with an enemy. When it hits a certain value, it plays the code. The whole thing is an if-statement.

'getWorld().score();' will not work, either. The score() method is not located in the 'World' class, but in the sub-class of World that HayleyG created. I will use 'WorldName' to refer to that sub-class of World. <Code Omitted>will access the score() method.

You could use the GreenfootImage methods getWidth() and getHeight() and then perform your calculations with them.