Discussions

With the int field: <Code Omitted>It might look something like this: <Code Omitted>

There is no general solution to a problem like this. But here is some useful information: If you want to do it the object oriented way, you may create a HealthBar class: <Code Omitted> To create a visual health bar, use GreenfootImage to set the objects image. Here are some important methods:

Here is a source code that slows down all enemies by one movement point for 5 seconds when You collects a SlowDownObject. The SlowDownObject is consumed in the process. <Code Omitted>

Should be:

The error occurs because getObjects(Shit.class) returns a List object, not a specific Actor object, and getX() and getY() are only declared in the Actor class as instance methods. That is, you cannot use those methods on a List instance. You must first make sure that the list is not empty. Then, if not, extract a ship from the list and use the methods on it.

Also, line 3, within a for loop, is troublesome because you a scaling the same image multiple times, which never works well. Best is to save the original image in an instance field, and on each iteration of the loop, create a copy of that image and then scale the copy once.

Show all methods and fields that deal with the coin counter and indicate the classes each code block/field is in.

Please have a look at https://www.greenfoot.org/topics/64967/0 There is a menu to choose which ship the hero is flying. You can reuse it for your idea, especially adding buttons for each position to the chooser-menu. At the button action, you can also add a check whether the hero has enough coins and the reduction of coins when the number of coins is sufficient. You can also add booleans to the hero class to indicate whether the effects are already bought. Please let me know whether this helps, otherwise just add additional questions as response here to resolve any remaining problems.

The problem is probably the check "x>=0 ||x==getWorld().getWidth()". The first part checks whether x is greater or equal 0, which is always true. But I think you want to check whether x is less or equal. Note, that you need two simple ideas as the basis for the reflecting: 1. If the fish bounces off top or bottom, its new rotation is 360-oldValue. 2. If the fish bounces off left or right, its new rotation is 180-oldValue. A simple source code to implement this:

ok, but, could you send me a code, as an example, if you can

Use Actor type objects to display clickable text. Use World objects for different screens (probably).

Need codes for Robby2 constructor and for randonSpawn method.

It seems that "this.paddle" is null. Therefore: 1. Please give the source code where the constructor is called (new Ball(..., ...)). (if the first parameter is null, we found the problem) 2. Please change the line "public Paddle paddle;" to "private final Paddle paddle;". This ensures that the constructor is the only place "this.paddle" is set (otherwise one would have to check whether paddle gets changed somewhere else in the source code).

Never mind, I figured it out.

sorry to say I decided not to submit anything and fail my course. I just lost interest in programming :<