posted                   

• With the amount of data that is even capable of being sent over the web the program shouldn't take more than a couple seconds to run, but hey, with all this talk of preformance you never know, so it would be nice to tell the user we're working on it while the program runs. I realize that's probably not going to happen but... any way to do it?
• Will the script just sit there and wait while the JAva program runs, and thus I can simply assume once it's run that everything is done now and I can move on to getting the file to the user? If not, how do I tell when it's done?
• I have this file sitting on the server, I need to get it to the user and then delete it, how?

Hobbes

Posts: 10602 | Registered: Oct 1999  |  IP: Logged | 

posted                   

code:

---

package Converter;
public class hello
{
   public static void main(String[] args)
   {
       System.out.println("Hello Hobbes");
   }
}

---

code:

---

Main-Class: Converter/hello

---

code:

---

C:\>"c:\Program Files\java\jdk1.5.0\bin\jar" -cmvf manifest.txt hello.jar Converter/*.class

---

HTH

P.S. I work with FarmGirl.

Gregg Bolinger
Javaranch Sheriff | Weblog

[ August 05, 2004, 05:57 PM: Message edited by: Gregg ]

Posts: 2 | Registered: Aug 2004  |  IP: Logged | 

posted                   

quote:

---

Sorry Hobbes, but this one's one CS people have been looking at for a long time. Excepting speed...

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What are you sorry about? I prefer C++ for many reasons, one of which is that my mind works exactly like the way C++ is written (object oriented, but with no abstraction above hiding registry moves and the like). It's exactly as tedious as I like and incredibly powerful, and it is faster if you know what you're doing (which I do like to flatter myself that I do).

And I still think that if some real time and money was invested in good, high-level libraries C++ could really compete on that platform with languages like Java and C#, the reason it isn't competing is because no one wants to put in time and money. Which is acceptable, I wouldn't really want to use those libraries myself, and I wouldn't be surprised in the least if it wasn't really monetarily beneficial, I'm just saying if a company with some money really wanted to they could build C++ to compete on just about any level.

Hobbes

Posts: 10602 | Registered: Oct 1999  |  IP: Logged | 

posted                   

I have this book with a title something akin to "Efficent C++ programming", and if I ever feel like everything that can be done has been done in terms of writting the most efficent code to do basic, everyday problems, I'll just read a few lines and remind myself that's just plain not true.

quote:

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I'm not sure what you mean about having to write all those abstraction layers . . . higher level languages are higher level because they make it easy to develop abstractions, and they cut down on development time, usually by large factors.

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I mean that a high level language is one in which so much more code has to be written for the language itself, C++ has the abstraction that you don't have to worry about registry values and what not, but you have to deal with memory pretty directly (like arrays of charecters instead of String objects), every layer up you go in the language is a layer more you have to write into it. I was talking about the time making the language itself, not programming in it.

Hobbes

Posts: 10602 | Registered: Oct 1999  |  IP: Logged | 

posted                   

quote:

---

How to Run the Converter

The first step in running the file converter is unpacking it. In Linux or Unix you should be able to use the “unzip” command to do this. In Windows, right click on the file (Converter.zip) and then select “Extract All”.

No matter the operating system, you must have Java installed on your computer. You can download Java at Sun’s website. Once you’ve downloaded Java you have all the tools you need to run the file converter.

If you’re on Linux or Unix, then you can run the file converter with one line. Once you’re in the appropriate directory (within the Converter folder) the following line should run the program:

java -Xmx512m -jar Converter.jar

If you’re running Windows it is both easier and much more difficult. Double clicking on the file “Converter.jar” will run the program, but will do so with a very limited amount of memory. The file converter is very memory intensive, so it’s quite likely that it will hang if it runs this way. In the Windows version this program also comes with a MS-DOS batch file named “RunConverter.bat”. Double clicking this will run the program with the appropriate memory, if you installed Java in the default location, and if it’s the same release as was current when the converter was created. Failing that, try to find where your java files are (the normal is in C:\Program Files\Java\j2re1.4.2_04\bin\java, the "j2rel.1.4.2_04" will change when a new release of Java is made). Then open the batch file with a text editor like notepad or WordPad. The file should look like this:

“C:\Program Files\Java\j2re1.4.2_04\bin\java” -Xmx512m -jar Converter.jar

Change it so that it looks like this:

“Your_Java_Folder\bin\java” -Xmx512m -jar Converter.jar

Be sure to include the quotation marks and a new line at the end of the file. Save and exit, and then you should be able to run the file converter simply by double clicking the batch file.

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How does that strike you?

Hobbes

[ August 06, 2004, 10:54 AM: Message edited by: Hobbes ]

Posts: 10602 | Registered: Oct 1999  |  IP: Logged |