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crouse
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Joined: 17 Apr 2003
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Location: Iowa
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crouse
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VHockey86
Advanced Member
Joined: 12 Dec 2004
Posts: 989
Location: Rochester
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 Posted: Mon Sep 26, 2005 7:54 pm Post subject: |
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you need to put your S.O.P statement inside the helloworld class' constructor if you want to instantiate an object....(not that you need to). The main method does not go in the constructor
| Code: |
public class HelloWorld {
HelloWorld() {
System.out.println("Hello World");
}
public static void main(String[]args) {
HelloWorld foo = new HelloWorld();
}
}
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The file name MUST match the class name and is case sensitive (ya, java is a pain in the a**).
So you need HelloWorld.java in my little example
This would also work perfectly fine without actually instantiating an object. Just use the main method procedurally and inside a random class that is your file name
| Code: |
public class HelloWorld {
public static void main(String[]args) {
System.out.println("Hello World");
}
}
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crouse
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VHockey86
Advanced Member
Joined: 12 Dec 2004
Posts: 989
Location: Rochester
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| Posted: Mon Sep 26, 2005 8:04 pm Post subject: |
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Its case sensitive, you file MUST be "HelloWorld.java" using my code.
Download the sun JDK
https://sdlcweb3a.sun.com/ECom/EComActionServlet;jsessionid=775B0FDDAA5B876EAF2BA1B81FFE1AE7
It's by far the best compiler I've ever used in terms of helpful errors messages and stuff.
Get on IRC and this will be easier =)
I also had a typo that I fixed by editing the post,
Change "HellowWorld" to "HelloWorld" =).
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crouse
Site Admin
Joined: 17 Apr 2003
Posts: 11855
Location: Iowa
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| Posted: Mon Sep 26, 2005 8:12 pm Post subject: |
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| Code: |
crouse@linux:~/Scripts/javastuff> ls
helloworld.class helloworld.java HelloWorld.java
crouse@linux:~/Scripts/javastuff> gcj --main=HelloWorld -o HelloWorld HelloWorld.java
/usr/lib/gcc-lib/i586-suse-linux/3.3.4/../../../../i586-suse-linux/bin/ld: cannot find -lz
collect2: ld returned 1 exit status
crouse@linux:~/Scripts/javastuff> gcj -C HelloWorld.java
crouse@linux:~/Scripts/javastuff> ls
helloworld.class HelloWorld.class helloworld.java HelloWorld.java
crouse@linux:~/Scripts/javastuff> gij HelloWorld.class
Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorld.class
at gnu.gcj.runtime.FirstThread.run() (/usr/lib/libgcj.so.4.0.0)
at _Jv_ThreadRun(java.lang.Thread) (/usr/lib/libgcj.so.4.0.0)
at _Jv_RunMain(java.lang.Class, byte const, int, byte const, boolean) (/usr/lib/libgcj.so.4.0.0)
at main (Unknown Source)
at __libc_start_main (/lib/tls/libc.so.6)
at _start (Unknown Source)
crouse@linux:~/Scripts/javastuff>
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mr_ed
Site Admin
Joined: 28 Aug 2003
Posts: 3819
Location: 42 miles north of Ogdensburg, NY
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| Posted: Tue Sep 27, 2005 1:26 pm Post subject: |
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| crouse wrote: | | Code: | /usr/lib/gcc-lib/i586-suse-linux/3.3.4/../../../../i586-suse-linux/bin/ld: cannot find -lz
collect2: ld returned 1 exit status
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Do you have the development package for the zlib library? That may be the cause.
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I'll be the first to admit.... i dont' know anything really about java. However, the cross-platform capabilities intrigue me, and jbsnake is beating me about the head with the big stick to give it a try. I am "trying" ...... just haven't had much success yet 
PEBKAC error i'm sure 
)