How to print messages from running jar file?

Question

Lately I've been working on building two tools using Eclipse. I'm printing some messages to the console there (System.out.print). However, I've now constructed a .jar file for each tool, which I want to run on a different machine (no eclipse installed). Running this .jar does not provide me with the messages I'm printing.

What is the best way to print messages to the screen from a running .jar file? For example, how to print:

System.out.print("Results succesfully saved!");

I've googled quite a bit, but couldn't find any results.

Answer 1

System.out.print("Results succesfully saved!"); will work just as fine for a .jar-program. However, it requires the user to run it in a terminal so that he sees the stuff printed to standard output.

If this is not what you're after, then perhaps you want to have a look at JOptionPane which has a few static methods to graphically display messages like those.

This screenshot

is for instance produced by this snippet:

import javax.swing.JOptionPane;

class Test {
    public static void main(String[] args) {
        JOptionPane.showMessageDialog(null, "Results succesfully saved!");
    }
}