new to java

[xddxogm3]

I'm trying to write my first hello world java program.
I do not know what I'm doing wrong.

public class helloworld
 {
 																															  
 		System.out.println("Hello World");
 																															  
 }

here are my errors

helloworld.java:4: Invalid method declaration, method name required.
System.out.println("Hello World");
^
helloworld.java:4: Class or interface declaration expected.
System.out.println("Hello World");
^
2 errors

[XSquared]

Just like C/C++, you still need a main function.

public class helloworld
{

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

}

[xddxogm3]

thank you for the response.
i made the adjustments, but it provides me the following error.

/usr/lib/gcc-lib/i386-redhat-linux/3.2.3/../../../crt1.o(.text+0x18): In function `_start':
: undefined reference to `main'
collect2: ld returned 1 exit status

is this due to i have no return type?
or does the gcc-lib portion of the error path mean i do not have the needed libraries?

I tried to add a return type, but with no luck.

[XSquared]

What command are you using to compile it?

[xddxogm3]

gcj helloworld.java

Isn't gcj similar to gcc and g++ for compile commands?

i read the man page and it states that it is similar to gcc

SYNOPSIS
gcj [-Idir...] [-d dir...]
[--CLASSPATH=path] [--classpath=path]
[-foption...] [--encoding=name]
[--main=classname] [-Dname[=value]...]
[-C] [--resource resource-name] [-d directory]
[-Wwarn...]
sourcefile...

I'm assuming, and correct me if i'm wrong, but the helloworld program is so simple that it shouldn't require any special options or header files. At least that is what I take from reading Oreilly Java in a Nutshell

[xddxogm3]

I guess noone knows what I'm doing wrong?
Please someone help.

[XSquared]

Try using javac instead of gcj.

javac helloworld.java
java helloworld

[xddxogm3]

i can only get javac man pages.
javac itself doesn't work on my version of red hat.
I tried to use an rpm to fix, but the rpm keeps saying i have a key error.
So do you think it is a compiler issue?
i will post the rpm error when i get home.

[XSquared]

Try this:

gcj --main=helloworld helloworld.java

GCJ needs you to tell it which class contains the main function.

[xddxogm3]

thank you the --main=helloworld worked.
i finished my first java program due to your help.
you rock.
now that i know how to compile a program, i'm guessing the remainder is going to be similar to c and c++
if i could only figure out rpm files now.
do you know anything about red hat and rpm (red hat package manager)
I'm using this command line syntax

 rpm -i  redhat-java-rpm-scripts-1.0.2-2.src.rpm

this is the error i'm getting.

warning: redhat-java-rpm-scripts-1.0.2-2.src.rpm: V3 DSA signature: NOKEY, key ID db42a60e

i'm starting to think this means the signature is invalid, so the origin of the package is not guaranteed, causing the error.

this kicks royal butt.
i can write more java code with just the capability of compiling. it is amazing how many languages you can pick up with only knowing c and the compiler.

[XSquared]

I don't know anything about the RPM system, 'cuz I'm using Gentoo and Portage.

[xddxogm3]

http://www.linuxquestions.org/questi...hreadid=190568

this is the link to my linux question. just in case anyone wants to see what the kind people as
linuxquestions.org wanted to say about it. sorry to post a thread from another forum here, but i needed to know and i figured someone else may want to know.

x, thanks again for the help.