Databases
StackOverflow2013
Postsdbo
POJava application only works when launched via a terminal/command prompt
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POJava application only works when launched via a terminal/command prompt
    primarykey
    data
    text
    <p>I'm recently starting to learn Java and have had success writing and compiling my own application (written in Sublime Text, a text editor, and compiled via javac).</p> <p>The application runs perfectly when launched via a terminal (or command prompt if I'm on my Windows PC), but if I try launching it from the file itself (in Windows, double clicking it and ensuring Java is the open-with method, or on my Ubuntu laptop, making it executable and doing the same) I get a very short lived loading cursor and then nothing. </p> <p>The application (which converts between degrees Celsius and Fahrenheit) uses some simple Swing dialogs to get the user's input and to display the result.</p> <pre><code>import javax.swing.*; public class DegreesConversion { public static void main( String [] args) { String input = JOptionPane.showInputDialog("Enter a temperature followed by either C for Celcius or F for Fahrenheit\nE.g. 30C or 86F"); int degrees = Integer.parseInt(input.substring(0,input.length()-1)); switch (input.toLowerCase().contains("f") ? 0 : input.toLowerCase().contains("c") ? 1 : 2){ case 1: JOptionPane.showMessageDialog(null,(((degrees*9)/5)+32)+" degrees Fahrenheit", "Conversion complete", JOptionPane.INFORMATION_MESSAGE); break; case 0: JOptionPane.showMessageDialog(null,(((degrees-32)*5)/9)+" degrees Celcius","Conversion complete",JOptionPane.INFORMATION_MESSAGE); break; default: JOptionPane.showMessageDialog(null, "The input you entered was not recognised!","Unknown input", JOptionPane.ERROR_MESSAGE); break; } } } </code></pre> <p><em>(This is by no means meant to be a serious or terribly functional application, it was simply my own attempt at making something in Java)</em></p> <p>Anyhow, I'm not sure why this application, when compiled, only functions when launched from a CLI using "java DegreesConversion", and not when launched through a double click. I have looked for answers regarding this on Google and Stackoverflow, but haven't found anything near a relevant solution or hint as to why this is so.</p> <p>I'm considering that Java .class files can't be executed the same as .jars? Any assistance would be greatly appreciated!</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USFrohman
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POJava application only works when launched via a terminal/command prompt
      1. This table or related slice is empty.
      1. VTUpMod
    1. COwhat do you double click on? The class file, the java file? both won't work as you see yourself your command has to be `java classname` and not `java classname.java` or `java classname.class` for that matter.
      singulars
      1. POJava application only works when launched via a terminal/command prompt
      1. USstryba
    2. COhave you created a shell script or cmd file which will start the application?
      singulars
      1. POJava application only works when launched via a terminal/command prompt
      1. USSergey Benner
    3. COI was under the impression that a .class file could be run much like the .jars that I have seen. Yeah a script would work - but I was looking for getting it to function when launched via double click (open with).
      singulars
      1. POJava application only works when launched via a terminal/command prompt
      1. USFrohman
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload