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silly question! how do u compile a prog?

lallusa Posted: Sat Feb 23, 2002 1:03 am

Joined: 23 Feb 2002

Posts: 7

silly question! how do u compile a prog?

Hi there, I know it sounds really stupid.
But I seriously know nothing about computers. How do
you compile a java program? I got some instructions
from my teacher but did not understand a thing! I
tried using J++ (even though i`m not supposed to) but
the problem is, it closes the output window right
away so I don`t have time to copy it. Does anyone have
an easy way of compiling?

robtoy1 Posted: Sat Feb 23, 2002 1:17 am

Joined: 23 Feb 2002

Posts: 2

silly question! how do u compile a prog?

I use MS J++ at work and you shouldn`t have a
problem compiling if you put your file in a project. Once
in a project, choose the Build option on the toolbar
and select Build (or just hold down Cntl+Shift+B). If
you wish to compile and run it outside of the editor,
go to the MS-DOS Prompt. Map your way to the
directory where the .java file is. Then type: javac
[filename].java If you compile with no errors, another prompt
will appear. To run the program, type: java
[filename] Hope this helps.

babe_in_bush85 Posted: Sat Feb 23, 2002 1:23 am

Joined: 08 Feb 2002

Posts: 8

silly question! how do u compile a prog?

To compile a java program, at the command line
type: javac filename.java For example, given the file
MyFirstClass.java which contains: class MyFirstClass { public
static void main(String[] args) { 
System.out.println("Hello World"); } } to compile at the
command line type(case sensitive): javac
MyFirstClass.java to run at the command line type: java
MyFirstClass and you should see the phrase Hello
World There is lots of good information at
<a href=http://java.sun.com target=new>http://java.sun.com</a> especially the
Java Tutorial section.

lallusa Posted: Sat Feb 23, 2002 9:31 am

Joined: 23 Feb 2002

Posts: 7

silly question! how do u compile a prog?

Thanks. I managed to do that once but then I
forgot what I did. Now I`m trying to do it again but
it`s adding the form1.java to the project
automatically. So if i compile, it gives me a blank form. If i
delete the form from the project, it gives me an error.
I hope that makes sense! I remember that when it
did compile, the window closed right away. So I was
not able to copy the output. Is there a way I can
keep the window open as in C++? Thanks a
lot

lallusa Posted: Sat Feb 23, 2002 9:34 am

Joined: 23 Feb 2002

Posts: 7

silly question! how do u compile a prog?

I tried this. but this is what it`s giving me
: `javac` is not recognized as an internal or external
command, operable program or batch file. do I need to d/l
any programs for that or what? Thanks a lot
:)

diahron Posted: Sat Feb 23, 2002 11:01 am

Joined: 15 Feb 2002

Posts: 11

silly question! how do u compile a prog?

you need to set the path to Java`s JDK?
directory. Substitute the ? with the version of the JDK on
your machine(the directory`s name). Once you set the
path in the environment variables you will be able to
compile and run any .java file from any directory. I
think the problem you`re having is setting the `path`.

lallusa Posted: Tue Feb 26, 2002 10:49 am

Joined: 23 Feb 2002

Posts: 7

silly question! how do u compile a prog?

Thanks a lot! u were right. I finally managed to
compile it. Now I have another question. how do you type
cast in Java? let`s say u have Cost = Quantity *.8763
(float, float, and double, respectively). what should u
put in front of the number to cast? Thanks!

hibjavagroup Posted: Tue Feb 26, 2002 4:24 pm

Joined: 26 Feb 2002

Posts: 1

silly question! how do u compile a prog?

This web page has some good info. about casting it may interest u. <a
href=http://java.sun.com/docs/books/jls/second_edition/html/conversions.doc.html
#27529
target=new>http://java.sun.com/docs/books/jls/second_edition/html/conversions.do
c.html#2752
9</a>

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