How to run my program?

**Petee** · 10-01-2011, 05:37 AM

So I have just started java about 2 days ago and i have started making my first real application. I have started making a calculator and it is not yet complete, you can only do + and only 2 numbers, e.g. 50+50 not 50+50+50. So anyway, I have saved it as a .java file, compiled it into a .class file and now I'm guessing because you cant open .class files I have to make some sort of .exe file to run it? I honestly have no idea what to do. :(

I have used eclipse to type the code and run it to see if it works, then copy and pasted it into notepad++ to save as a .java file. Then I installed something from java website to let me compile things in cmd.

**DIego912** · 10-01-2011, 05:45 AM

Run it with Eclipse IDE !

**Petee** · 10-01-2011, 05:46 AM

um... i have eclipse ide...

**sunde887** · 10-01-2011, 05:55 AM

In eclipse there should be a run button, it looks like a play button. However; you will need to write a main method which the compiler searches for before running anything.

**Petee** · 10-01-2011, 05:57 AM

I don't think you guys read my entire post, I HAVE run it with eclipse, and i HAVE compiled it into a .class file, I want to know HOW TO RUN IT without ECLIPSE. If you understand me now...

**sunde887** · 10-01-2011, 06:08 AM

You mean through cmd? Or a clickable file? If you want a clickable file, you need to create a executable jar file, google can help you here. If you mean through cmd, open cmd, cd to file location and type "java filename" with no extension. If the file is HelloWorld.class, type

Java Code:

java HelloWorld

**Petee** · 10-01-2011, 06:12 AM

yes I want a clickable file. I searched on google and found nothing :(

**Petee** · 10-01-2011, 01:21 PM

cant anyone help?

**Iron Lion** · 10-01-2011, 01:24 PM

Creating a JAR File (The Java™ Tutorials > Deployment > Packaging Programs in JAR Files)

**Solarsonic** · 10-02-2011, 04:00 AM

Originally Posted by Iron Lion

Creating a JAR File (The Java™ Tutorials > Deployment > Packaging Programs in JAR Files)

Follow this guide. JAR's are Java's version of EXE's.

**jammas615** · 10-02-2011, 04:46 AM

Eclipse can export your project into a .jar very quickly and easily.
To make a .jar:
1. Go File -> Export
2. In the export window, find Java and click the plus next to it.
3. Now select 'Runnable Jar' and click next
4. For launch configuration, select your project from the 'Launch configuration dropdown and make your export destination where you want your .jar file to be placed
5. Make sure 'Extract required libraries' is selected and click Finish (if you get a warning just click ok)