Re: Self-executing JAR

From:

Tim Slattery <Slattery_T@bls.gov>

Newsgroups:

comp.lang.java.programmer

Date:

Mon, 16 Apr 2012 16:34:05 -0400

Message-ID:

<i90po791d7luqcjsm4k2h5eoa72i23g8af@4ax.com>

Tim Slattery <Slattery_T@bls.gov> wrote:

I must be doing something stupid.

I have a very simple command-line program in Eclipse, just a
System.out.println("Hello World"). It runs just fine in the IDE. So I
use File|Export|Export, and select "Runnable JAR file". A JAR is
created.

And it doesn't work. I can double-click on it, or I can call it from a
command line. I get nothing. No "Hello world", no error message, no
nothing. What have I missed?

More info:
Here's the class:

public class Main {
    public static void main(String[] args)
    {
        System.out.println("Here I am!");
        try
        {
            SimpleDateFormat sdf = new
SimpleDateFormat("MM/dd/yyyy");
            sdf.setLenient(false);
            Date mydate = sdf.parse("2/29/1900");
            System.out.println("Good date: " + mydate.toString());
        }
        catch (ParseException ex)
        {
            System.out.println("ParseException: " +
ex.getMessage());
        }

    }

    /* (non-Java-doc)
     * @see java.lang.Object#Object()
     */
    public Main() {
        super();
    }

I export "Main.jar". To invoke from the command line, I type
"Main.jar". Nothing but a command prompt. I have jedit installed. If I
go to its directory and type "jedit.jar", it jumps right up. Therefore
I assume that the JRE can be found.

--
Tim Slattery
Slattery_T@bls.gov