posted                   

code:

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public class MyJavaProgram{
     
    public static void main(String[] args){
        System.out.println("Hello World!");
    }

}

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And save it in a file called what you put as the class name plus .java as the extension. (MyJavaProgram.java in my example). Depending on if your class-paths are setup correctly, you should be able to compile the program by typing: "javac MyJavaProgram.java" from the command line in the directory your file is in. Then run the program by typing: "java MyJavaProgram".

If you see "Hello World!" print to the screen, you're in business . If either of these steps display an error message, your classpath is probably setup wrong, and you may have some painful trouble-shooting ahead of you.

Anyway, when you get to this point, follow the Sun tutorial, and do a TON of experimenting. Play around. Make your own objects. Link them together in interesting ways. Object Oriented programming is insanely powerful, and it can even be fun.

I would suggest getting an IDE eventually (Eclipse being the most popular), as it will make your life a lot easier. If a full blown IDE is too complex for you at this point, at least get a decent text editor (there are a lot of free ones out there). Notepad is fine for your first couple of programs, but it makes your life tough for anything more than a couple of hundred lines.

If you have any questions on the specifics, feel free to ask hatrack. There are several experienced java developers here, including myself . (I should soon be a Sun Certified Java Programmer, as soon as I get a chance to heavily experiment with all the new 5.0 features.)

Posts: 5656 | Registered: Oct 1999  |  IP: Logged | 

posted                   

quote:

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Originally posted by King of Men:
IDEs are for sissies. Real Programmers use emacs.

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Or Vi

Posts: 2437 | Registered: Apr 2005  |  IP: Logged | 

posted                   

quote:

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IDEs are for sissies. Real Programmers use emacs.

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Real unemployed programmers perhaps. Try and get a software engineering job and then don't use an IDE. Then explain why your productivity is half what your coworkers produce .

Posts: 5656 | Registered: Oct 1999  |  IP: Logged | 

posted                   

quote:

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Originally posted by Xavier:

quote:

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IDEs are for sissies. Real Programmers use emacs.

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Real unemployed programmers perhaps. Try and get a software engineering job and then don't use an IDE. Then explain why your productivity is half what your coworkers produce .

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Posts: 10645 | Registered: Jul 2004  |  IP: Logged | 

posted                   

quote:

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Well, as a matter of fact, I have a programming job. And I use emacs, as do all my colleagues

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When I was in college, this was true of me and my coworkers on my research grant. It was a relatively small program, so the lack of an IDE did not hurt us too badly. Plus it wasn't a web-based application.

Now that I am working on a massive program, with many programmers, and having it be a full featured enterprise application, the lack of an IDE would completely kill us. Or we'd have to use several different applications to mimic what an IDE does for us.

How many programmers on your project, KOM? Do you use CVS at your job (or a different versioning system)? If so, do you use it through a front end or through the command line?

These answers might help me determine if you guys are stubborn, or just stupid . For extremely small projects, IDEs aren't necessary, though they are still very helpful. Just the code-complete feature on Eclipse alone saves me so much time its not even funny. The fact that it displays compilation errors as I am coding saves considerable headache. The built in CVS functions make coordinating with 8-10 other programmers even possible. And without the ability to walk through somone else's code with the debugger, I simply could not do my job effectively (hundreds of System.out.printlns for the loss). Add in the Project Set plug-ins, Quantum DB plug-ins, server configuration and management options, J2EE support, and TONS of other features, and I probably produce 10-20 times what someone with Emacs could trying to do my job.

I wouldn't brag about sticking with stone-age tools. Its like being a carpenter, and not using an nail-gun, then bragging about it. Sure, you are more "hard-core" for using a traditional hammer, but someone can come in and triple your productivity.

Posts: 5656 | Registered: Oct 1999  |  IP: Logged | 

posted                   

quote:

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Well, as a matter of fact, I have a programming job. And I use emacs, as do all my colleagues, except the Stone-Age types who stick to that survival of the electro-mechanical era, vi.

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Posts: 37449 | Registered: May 1999  |  IP: Logged |