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"if (someObject instanceof SubclassName);" should be sufficient. I'm just seeing if the object is a certain class, and if it is, then get certain information and save it in a specific format as a String for an algorithm.

Using 'setLocation(getX(), getY()-getImage().getHeight()/2' every act cycle will indeed make your character go up the screen half its height every act cycle. You need to get a reference to that actor it is following (I will call it 'followed') and use 'followed.getX()' and 'followed.getY()-getImage().getHeight()/2'.

Okay one more thing. How are things with releases in java? Do I have to do it manually or is there some kind of autorelease behind? I have never thought of this when programming in Greenfoot.

Without relying on tricks, take a look at the FontMetrics class and its charsWidth method. It can be complicated when using several substrings, but works great for broader applications of the problem. Most of my GUI components in my GUI Components scenario use it.

Thanx very much both of you!!!!

Very straightforward. Thank you for your help ^_^

Try this

My last post in this discussion was basically about this. Take a look. It will probably give you some insight as to how to accomplish this.

It's working now, thank you so much :) ..

You probably need to check for collision while turning also, and negate any turn that a collision occurs on.

Thanks again, it works perfectly.

More understandably, might be: <Code Omitted>The 'this' keyword is the default object to execute a method on (or for) if no object is explicitly given.

I know well what results you are getting. The coding for scrolling is very 'touchy' and must be coded with exactness. Relying on the keys that are down to run the scrolling does not keep the scrolling in sync with the location of the player (if the player is at an edge or you restrict the movement of the player while a key is down, but still try to scroll...well...). Best is to scroll by relying on the position of the sprite. I came up with the following:

(1) You need to have the Ball objects remove themselves when they hit the bottom edge of the window. (2) You need a way to end the game -- maybe have a certain number of lives? (3) You may want to decrease the time between speed incrementing (3 minutes between is large) I think I would have coded the timer and speed parts more like this: