Trying to make runnable jars

[mwr1976]

I am trying to make a runnable .jar using the cmd line here's what is happening
in my jar folder on my c:\ drive






my game package contents:




Here is my manifest file:





I created the jar file fine but I get an error when I try to run it.
This pic will show me creating and the error when trying to run:




Thanks!

[DarrylBurke]

Does Frame.java start with a package statement?

db

[mwr1976]

yes

package game;

[DarrylBurke]

So, the class isn't Frame, it's game.Frame. And not game.Frame.class either.

With your present manifest, Java is looking for a class named class (which you couldn't actually create, since class is a reserved keyword) in the package Frame.

db

[mwr1976]

thanks it worked! The reason I did the Frame.class is because the example in the java tutorials showed it as mainclass.class but any way i get it now....One other question I have two folders in my eclipse project under the src folder: images and sounds. In the tutorials I didn't see anything on how to include these. The path to the images are coded as:

"src/images/picture.png" 

"src/sounds/soundEffect.wav"

so how do I include these resources in my project and do i need to change the path to do so?


Thanks!

[mwr1976]

I meant include in my jar not my project

[mwr1976]

ok..I figured out how to include the resources and the program works........but it only works from command line using

java -jar space.jar

if I double click on the jar file I get and error:
cannot find main class game.Frame

how can I make it so it works when clicked?

[Norm]

If it works when you manually enter the java -jar space.jar command, then it should work when you double click on the jar file to open it. Is there an old version of the jar file that is confusing this?

[mwr1976]

no...I even renamed it and its says it cannot find the main class and it only runs from the directory it was crated in on the cmd line

[Norm]

Move the jar file to a testing location directory, open a command prompt window and enter: java -jar <THEJARFILENAME>.jar
You must be missing some files in the jar file if it only works in one directory.

Copy the console and paste here.
To copy the contents of the command prompt window:
Click on Icon in upper left corner
Select Edit
Select 'Select All' - The selection will show
Click in upper left again
Select Edit and click 'Copy'

Paste here.

[mwr1976]

I put it in a folder on the c: drive name jarTest



Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Users\Remo>java -jar space.jar
Error: Unable to access jarfile space.jar

C:\Users\Remo>

[Norm]

You must change the directory (use the cd command) to be in the folder with the jar file. The java command did NOT find the jar file in the Remo folder.

[mwr1976]

The program ran but no Images or sound files.

Here's what I get when the jar is clicked:





cmd line contents

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Users\Remo>java -jar space.jar
Error: Unable to access jarfile space.jar

C:\Users\Remo>cd\

C:\>cd jartest

C:\jarTest>java -jar space.jar
java.io.FileNotFoundException: src\game.txt (The system cannot find the path spe
cified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.jav a:138)
at java.io.FileInputStream.<init>(FileInputStream.jav a:97)
at java.io.FileReader.<init>(FileReader.java:58)
at game.Frame.<init>(Frame.java:76)
at game.Frame.main(Frame.java:170)
Wave file not found: src/sounds/Intro.wav

[Norm]

java.io.FileNotFoundException: src\game.txt

Is that file for input only? It is not updated, just read?
You need to add that file to the jar file and to change the code so that it gets the file using getResource()

And do the same for ALL files the program uses. Put them in the jar file and change the code.

[mwr1976]

is getresource() a swing method and how do I "put them in the jar file"?

[Norm]

Do a Search on the forum for getResource for many code samples on using that method.

Use the jar command to put files in a jar file.

[mwr1976]

here is some of my Images in code:

ImageIcon ic = new ImageIcon("src/images/space_background.png");
		ImageIcon icChicago = new ImageIcon("src/images/chicago.png");
		ImageIcon icGo = new ImageIcon("src/images/SpaceCraftGo.png");
		ImageIcon icPlode = new ImageIcon("src/images/explode.png");
		
		//actually load background image into image object
		background = ic.getImage();
		chicago = icChicago.getImage();
		blast = icGo.getImage();

would I do this?

URL myUrl = background.getClass().getResource("src/images/space_background.png");

or this

URL myUrl = ic.getClass().getResource("src/images/space_background.png");

if that is correct what else do I have to do to have the image end up in my jar?

[DarrylBurke]

Read the API for ImageIcon. What are the available constructors? Do you see one that fits your requirement?

Have you read through the Oracle tutorial on How to Use Icons?

db

[DarrylBurke]

what else do I have to do to have the image end up in my jar?

Use the jar command to put files in a jar file.

Did you read that?

db