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-   -   DISCUSSION: Beginning with Java (http://www.linuxquestions.org/questions/linuxanswers-discussion-27/discussion-beginning-with-java-78915/)

darin3200 08-04-2003 12:21 PM

DISCUSSION: Beginning with Java
 
This thread is to discuss the article titled: Beginning with Java

Steve Cronje 08-04-2003 02:41 PM

Re: DISCUSSION: Beginning with Java
 
I have just skimmed the article, and it looks great. I will go through it in more detail later.

As someone who has been starting with Java only recently, these suggestions may come in handy to other beginners such as I:

1. By all means get a sophisticated IDE such as Netbeans or Eclipse, play around with it, and build a few apps, THEN PUT IT AWAY. It only gets in the way of learning the basics.

2. Download DrJava, which is a very simple, yet very supportive learning environment, and much easier to be productive in than using 'just' a text editor. It is open source, free, and is written in Java.

3. Download the full documentation from Sun. The API is here

4. Download, and work through Thinking in Java which is a free download, and will teach you tons.

Just my 2p

HTH
Steve

then 08-05-2003 03:02 AM

Hi

Well written article :), bad formatting though. Had a tough time reading.

A couple of spaces and some para-breaks would be welcome.

regards
theN

darin3200 08-05-2003 08:01 PM

Yeh, I probably should have put some more formatting in.

glj 09-03-2003 10:37 AM

It might be worthwhile to include a link to Blackdowns' site to download Java Linux stuff from. The site has links to loads of useful sounding programs too :)

glj

Neodymium 03-10-2004 04:33 PM

A nice introduction, I'll be doing some Java development at college next year, and it's always nice to be ahead of the game.

AskMe 04-24-2004 05:37 AM

What are the commands to run and compile!!!
 
I can say, it is good for beginers, but it lacks important fact, like what the command one should issue to compile these codes on Linux, and how one can see the output? It would be better if you include such topics.

darin3200 04-24-2004 11:53 AM

Yeh, i guess I took it for granted that I knew the commands but 'javac' for compile and 'java' for running

AskMe 04-26-2004 06:08 AM

Thanks, but I was looking for different thing!!
 
Yah, most know how to compile java source file with javac filename.java and run the compiled class file with java filename, but I was looking for different thing. I have installed Red Hat Linux 9, and with that there is free GNU, compiler and class file interpretor. After hard try, I found out how to use gcj and gij. So here is the command how to compile java on RedHat9.

To compile source file(filename.java)
gcj -C filename.java

To run calss file (filename.class)
gij filename

I hope this will help people like me, but I am still looking for how to run Applet on RedHat 9, I don't want to use Mozilla, because there is no plug-in installed and to install all these another headache for me as I know very less about linux.

lmellen 06-05-2004 02:40 PM

I've worked all the example programs up to class moon.The class moon program won't compile. I get:

ex6.java:16: cannot resolve symbol
symbol : method readline()
location: class java.io.BufferedReader

Then there is a ^ under the first new in the following line:

String strA = new BufferedReader(new InputStreamReader(System.in)).readLine();

Just wondering why it won't compile. No big deal, but a reply would be interesting.-- Thanks- Larry (I haven't been able to solve this problem)

darin3200 06-08-2004 04:39 PM

Have you typed this up the code yourself or have you tried copying and pasting into the .java file? Some times there can be typos that have an effect of the compilation of the programs. I'll check that out though.

lmellen 06-08-2004 11:06 PM

darin3200 -- I tried again, thus time using Gentoo, I get the same result.
Last time I used Fedora Core 2. I'm using j2sdk1.4.2_04 on
both systems. -- Thanks for the reply -- Larry

darin3200 07-01-2004 10:12 AM

Quote:

Originally posted by lmellen
darin3200 -- I tried again, thus time using Gentoo, I get the same result.
Last time I used Fedora Core 2. I'm using j2sdk1.4.2_04 on
both systems. -- Thanks for the reply -- Larry

Sorry it took so long to reply, I just saw this post today. I'm not sure what is going wrong, I am currently emerging j2sdk on my fresh gentoo install but I tried compiling it on j2sdk1.4.2_04 under Windows 2000 Pro and it worked fine. I'll try compiling it again under Gentoo once j2sdk is installed and get back to you.

v1pEr 03-03-2005 10:51 AM

A good introduction!

Baz8080 04-06-2005 03:58 PM

True, nice article, but the formatting is confusing - especially for beginners. We should be teaching them to correclty format and indent code as this will serve them throughout their careers as programmers.

I also think that it is usually easier to read if you create one instance of the BufferedReader and re-use this.

so

Code:

BufferedReader keyboardInput = new BufferedReader(new InputStreamReader(System.in)))
and then reuse it

Code:

keyboardInput.readLine().....


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