Content of a presentation I will give - Please advise of faults

Question

Hi,
As I mentioned in another thread I have to give a presentation on a chosen subject, I chose Java. This is quite important, at least for me it is anyway, I need to know what I am talking about and believe in what I am saying, I visit a seminar in July and this is about the most important part as well as a UNIX assignment. I have listed some of the things I will say below, please advise with what you might disagree with, if you can be bothered that is, I would be grateful :). If I get this wrong I dont get asked back to the academy full time to become SCJP certified and placed in the indusrty. I dont always want to stuck in retail :(
Title - The origins and benefits of Java
The early days
Java was part of a 1991 effort by Sun to produce a language and enviroment which would enable consumer electronics to be able to communicate with each other, they saw this as one of the next big things in I.T.
The sun team which James Gosling lead the coding side, set out to make an architecture neutral programming language which would be simply to use, secure and portable. Java was origianally called oak but didnt survive a patent check and was later renamed to Java.
Although, given there intial goals the project failed and they were turned down when showcasing a PDA called star 7 to potential customers within the industry they still had a created an extremley useful language in Java which was yet to realise its full potential.
Years ticked by before Javas big break came when Sun teamed up with Netscape to release the Hotjava browser which brought animation amongst other things to the Internet, its worth noting that Java was originally designed independant of the Internet but was later found to be a perfect match.
What is Java
Java itself is similar to both C and C++, it borrows its syntax from C and its object model from C++
Java is seen for a high level language anyways as easy to learn
Java code compiles slower than C/C++ one may ask why would we need Java?
Java's benefits
Java code compiles not into Native code like other languages, this is the main reason it runs slower but is the same reason Java is portable and secure.
This means a couple of important things in the world of networked computing, Security and portability.
Java code compiles into bytecode which is then interperted by a Java virtual machine (JVM). This means that only the JVM needs to implented for each different type of CPU or operating system. Where the internet or corperate networks are concerned this is a major plus as both are made up of many different machines.
Other benefits Java offers are Garbage collection, this is automatic memory managment, once the progam has finshed with an address in memory its automatically freed up, in other C/C++ this is left to programmer and can lead to errors and is also a waste of resource.
Also, in Java there are not Pointers like C/C++ instead, Java uses references, this is also a major plus in most cases, although pointers are moe powerful they cause many errors, java eleminates these errors by hiding the responsibility from the programmer, this means the programmer cant make common mistakes in C++ which are de-alocating memory twice or not at all, also this stops the programmer pointing to parts of memory which are out of bounds. This makes java more simple and user firendly.
Java has a massive class libary as standard, this library is on call for the programmer to call upon as needed, this library is packed with useful classes the progrmamer can use without having right the code himself.
Java is everywhere
Java is used in over 2.5billion devices these are listed below:
700 million computers
1 billion mobil phones
1.25 billion smart cards
plus set-top boxes, printers , webcams, games, lottery terminals, medical devices, parking payment stations etc.
and I will include a summary cover the main points of what I have listed above.
other things I might mention here and there.
Java is less expensive than .NET and other languages to use, with Java you pay a one off lisence fee rather than such as Microsoft who charge annual subscription.
Learning programming you may not see yourself as a programmer for consumer electronics but Java opens these doors to you.
Java is an excellent first language for people to learn who are starting out in programming, less confusing than C/C++ but still powerful.
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Thats about it, so come and get me! I was rather make a fool out of myself in a forum rather than at a seminar so I dont mind if your harsh, the presentation is in powerpoint format and the above is what I plan to say with the aide of slides, I wont be using notes, as they expect confidence and a sound knowledge of your subject. I know it would be nice to mention more about J2SE/J2EE but I dont have the knowlege at this stage, that is why I chose only the origins and benefits. BTW the speech is only ment to run for about 10 minutes.
Thanks to anyone who took the time out to read the above and post any suggestions.
Mike

Answer 1

Java code compiles slower than C/C++ one may ask why
would we need Java?It runs slower. No one cares about compile time.
>
Java code compiles not into Native code like other
languages, this is the main reason it runs slower but
is the same reason Java is portable and secure.
That point needs more explaination. Security has many meanings and in some circumstances native code will be considered more secure.
>
Java is less expensive than .NET and other languages
to use, with Java you pay a one off lisence fee
rather than such as Microsoft who charge annual
subscription.
Not sure what you meant there.
MS charges for the IDE. Sun charges for their IDE as well. The compiler is free from both however.