The problem is that i want something more "complex"[/QUOTE]

Java is your starting haven for suitable web applet game creation: --> http://en.wikipedia.org/wiki/Java_(programming_language)

Java applets can be directly integrated on web pages, and it's more powerful and complex than Flash.

Also, I checked out that game you want to make ... keep in mind that it's not an "easy" task to accomplish a game like that.

In reality, many programmers will struggle to get ping pong game logic and flow to be accurate, because even the most simple games require time and strategy.

The game you want to make is a bit farfetched from just being a Flash programmer. You should start smaller, and work your way up.

My advice: learn Java, use its API (or any graphics API/library it can bind with) and practice executable programs first, and try to accomplish more easier games (like some with direct raster graphics in memory, not 3-D models, complex animations, AI, etc.).

You are setting yourself up for a big goal before completing several smaller ones.

If you're only experienced in Flash (e.g. no other programming languages, syntax, etc.) you shouldn't worry too much about APIs and libraries so fast.

First, learn Java 100%(okay, maybe not 100%, but learn it well). Practice on an IDE program called Eclipse: http://www.eclipse.org/

After you get more familiar with Java, look into Java Swing - it provides a graphical window with utilities, buttons, elements, etc:

http://docs.oracle.com/javase/tutorial/uiswing/start/index.html

After you get the hang of that pretty well, and after you get more Java-specific experience(try in just the OSes console window, terminal, etc. and practice with text-based windows for a while), then it's time to move to the more serious stuff.

Remember, you have to start smaller before you advance into more complicated tasks. Within months you can already be writing games easily.

A beginner to science doesn't just jump straight into string theory.

Why java? Java is an interpreter that is bad because instead of directly being able to directly run your program it has to first in real time convert your code into machine code then run it that means slow down. Also java has no support for unsigned numbers this is bad. I can not go with out unsigned number. I needed them my programs would use a lot more ram if I could only used signed numbers. I would recommend C I write and C and my programs are fast.

Mine craft is writen in Java and it doesn't have these "performance" issues you're alluding to...and its a significantly large game.

The difference between signed and unsigned numbers is whether or not the last bit is used to represent a sign bit or a number value.
unsigned int range: 0 -> 4294967296
signed int range: -2147483648 -> 2147483648 (Note: 2147483648 - -2147483648 = 4294967296)
So, a signed int or unsigned int uses the same amount of memory: 32 bits!!! Using unsigned ints doesn't use less memory, it just changes the range of min and max values.

Java is actually a good language to use because it's trivial to port to other platforms and it has some of the most robust networking capabilities. If you're good with it and comfortable with it, it's a very good language to know! If you're concerned with performance problems, the first thing you should do is look at your algorithm design rather than blaming it on the JVM. Example: bubble sorting 1000 items will be slow whether you use C/C++ or Java because its a O(n^2) algorithm and not O(log n) like quick sort.