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Groups > comp.lang.java.programmer > #13594

Re: Self-executing JAR

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On 4/16/2012 1:34 PM, Tim Slattery wrote:
> 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.
>

You are missing something here, that can't compile as it is.  Try 
compiling from the command line.

javac Main.java

and if that produces no errors, then run it with

java Main

-- 

Knute Johnson

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Thread

Self-executing JAR Tim Slattery <Slattery_T@bls.gov> - 2012-04-16 14:46 -0400
  Re: Self-executing JAR Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-04-16 12:21 -0700
  Re: Self-executing JAR markspace <-@.> - 2012-04-16 12:22 -0700
  Re: Self-executing JAR Tim Slattery <Slattery_T@bls.gov> - 2012-04-16 16:34 -0400
    Re: Self-executing JAR Lew <lewbloch@gmail.com> - 2012-04-16 14:26 -0700
      Re: Self-executing JAR "John B. Matthews" <nospam@nospam.invalid> - 2012-04-16 21:06 -0400
    Re: Self-executing JAR Knute Johnson <nospam@knutejohnson.com> - 2012-04-16 14:35 -0700
    Re: Self-executing JAR markspace <-@.> - 2012-04-16 14:51 -0700
      Re: Self-executing JAR markspace <-@.> - 2012-04-16 15:00 -0700
      Re: Self-executing JAR Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2012-04-17 08:31 +0000
        Re: Self-executing JAR markspace <-@.> - 2012-04-17 07:35 -0700
    Re: Self-executing JAR Lew <lewbloch@gmail.com> - 2012-04-16 15:51 -0700
      Re: Self-executing JAR Tim Slattery <Slattery_T@bls.gov> - 2012-04-17 08:56 -0400
    Re: Self-executing JAR Tim Slattery <Slattery_T@bls.gov> - 2012-04-17 10:49 -0400
      Re: Self-executing JAR markspace <-@.> - 2012-04-17 07:57 -0700
        Re: Self-executing JAR Tim Slattery <Slattery_T@bls.gov> - 2012-04-18 09:06 -0400
  Re: Self-executing JAR Roedy Green <see_website@mindprod.com.invalid> - 2012-04-17 04:24 -0700

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