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basic java

warrenaldo

Folks,

I have a sample application using java. I usually run it from within my eclipse ide. And it runs grand.

Now i want to ship it as an executable for a basic user to click on. Or even run from dos.

I cannot run it from dos
it keeps giving me exception from thread main NoClassdeffounderror:

I am using jre 1.5.
What am i doing stupid?

And how do you propose i run it as an application for a basic user? Applet?

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aidan_walsh

Can we see the code, and how you're trying to launch it from the prompt?

By the looks of things, you're missing a required class.

warrenaldo

Lets assume its a helloworld output class. Now in eclipse it works perfect.

from the prompt i type
java helloworld.java
java helloworld

nothing works.

Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorld

Please help

aidan_walsh

I presume you navigate to the folder the helloworld class is in?

java helloworld.java wouldn't work, because that is the source file and not the compiled class file.

Draupnir

Do you need to do

javac HelloWorld.java
java HelloWorld

??

I havent done java since college.

warrenaldo

yes im in the correct folder. its driving me mad.

sicruise

Eclipse by default afaik adds a package to your project where all of your classes are held.

You will need to run it doing something like

java package.class

where package is the name of your package and class the name of your class... and do it from the folder that contains the package not the class itself.

edit: Make sure the package folder is in your classpath!

sicruise

Here's something useful for you to read...

http://www.jarticles.com/package/package_eng.html

warrenaldo

thank you :-)

Hobbes

sicruise wrote: »

Eclipse by default afaik adds a package to your project where all of your classes are held.

Naa it doesn't. It will create a src folder but it is independant of the package.

Easiest thing to do is export the java file as a JAR then specify the jar as a self-executing then point to your class.

After that just double click the jar file.

warrenaldo

ok moving onto problem number 2.

i want a way for the user to ba able to interact with the program. simple input. should i create an applet? if i do - can i make it executable?

Sean^DCT4

you can create a JAR file which is "executable" providing the user has the JRE installed.
Use Eclipse to do the GUI and as a previous poster said, Eclipse will generate a JAR file for you.

Seany