CODEWITHSUNDEEP
javajar
Juvar Abrera
Juvar Abrera

Reputation: 485

Build Jar File with multiple classes

Is there a way to build a jar file that is anything inside a specific folder?

Inside my folder I have my main class named "GamesCombined.java" with it's .class files

Here's what my directory looks like inside GamesCombined folder

-> GamesCombined.java
-> GamesCombined.class //classes*
-> games (folder)
|
|----> pacman (folder)
|   |
|   |----> PacmanGame.java
|   |----> PacmanGame.class //classes*
|
|----> racinggame(folder)
     |
     |----> RacingGame.java
     |----> RacingGame.class //classes*
-> images (folder)
|
|----> pacman (folder)
|    |
|    |----> //jpg's and png's
|
|----> racinggame (folder)
     |
     |----> //jpg's and png's

I already made a jar file of the GamesCombined.java by following this link: http://www.skylit.com/javamethods/faqs/createjar.html

But then it has an error:

Exception in thread "main" java.lang.NoClassDefFoundError: games/pacman/PacmanGame (wrong name: PacmanGame)

GamesCombined.java has import games.pacman.*;

Is there a way where I could just build a jar file including the other classes? What should I do? :o

I'm new when it comes on JAR files. :/

Upvotes: 1

Views: 4160

Answers (2)

rob_6036
rob_6036

Reputation: 11

The NoClassDefFoundError indicates that you have not specified the package inside PacManGame.java (or you didn't recompile it before adding it to the jar).

package games.pacman;
public class PacManGame {
    ...

To answer the original question, you can create the jar file using

jar cvfm gamescombined.jar MANIFEST.MF -C GamesCombined/ .

Upvotes: 0

Khinsu
Khinsu

Reputation: 1487

The easiest way is to use the included Jar Builder of your IDE. Java brings a tool which also can create JarFiles, take a look : Creating a JAR File

(your jdk/bin)jar cf jar-file input-file(s)

In both ways you have to check your classpath, written in your Manifest

EDIT:

JCreator Pro is quite easy:

click: Configure>Options>Tools>New>Create JAR File

this creates an user tool to create a JAR file, this does not yet include the manifest, you will have to manually add the manifest.

OR you can configure the command line switches to incorporate the manifest, try this for example: cvmf $[PrjDir]\MANIFEST.MF $[PrjName].jar .

this should include the manifest 'MANIFEST.MF' in your project directory as a manifest. You will have to create that yourself though.

NOTE: this has NOT been tested

Upvotes: 5

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