Create .JAR

Hi all i've this situation

Code:

---

- C:\
  - javagraf
      MANIFEST.txt
      - hofstra
        - matsrc
            *.class
            - expr
                  *.class

---

Main class is located into "matsrc" directory.
I want to creare .jar file in "javagraf" directory.

My MANIFEST:

Quote:

---

Manifest-Version: 1.0
Created-By: XXX
Main-Class: hofstra\matscr\mainClass.class

---

Quote:

---

cd C:\javafagraf

---

Quote:

---

jar cmf MANIFEST.txt MyJar.jar ???

---

I've tryed with:

Quote:

---

jar cmf MANIFEST.txt MyJar.jar hofstra\matscr\*.class hofstra\matscr\expr\*.class

---

but it don't work.

Where is the problem?

Just use the directory name.

Quote:

---

Originally Posted by Tolls

Just use the directory name.

---

Uhm, and isnt it?

Quote:

---

jar cmf MANIFEST.txt MyJar.jar hofstra\matscr\*.class hofstra\matscr\expr\*.class

---

I used relative path to include all .class files (including files in expr directory with second istruction).
But it do not work when i try
java -jar MyJar.jar.

What error message do you get? Open a command prompt window, change to the folder with the jar file and enter:
java -jar MyJar.jar

copy the console contents 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.

Quote:

---

Originally Posted by marksu988

Uhm, and isnt it?

---

No.
jar cmf MANIFEST.txt MyJar.jar hoftsra

In other words, just use the directory name.

Quote:

---

Originally Posted by Norm

What error message do you get? Open a command prompt window, change to the folder with the jar file and enter:
java -jar MyJar.jar
[..]
Paste here.

---

C:\javagrafzip>jar cmf MANIFEST.txt MyJar.jar hofstra (as Tolls suggest)

At now jar size is 66KB so i suppose that it is consistent.

C:\javagrafzip>java -jar MyJar.jar

Errore: impossibile trovare o caricare la classe principale Graf.class
Error: can't find or load main class Graf.class [eng]

I've tryed to modify my MANIFEST's main class row as:

Quote:

---

Main-Class: Graf.class

---

or

Quote:

---

Main-Class: hofstra\matscr\mainClass.class

---

or

Quote:

---

Main-Class: hofstra.matscr.mainClass.class

---

I've also tryed to change MANIFEST's extension as .MF (as some guides suggest)

result is the same: "can't find or load main class".

Look in the jar file with a zip utulity and see what the path to the Graf.class file is.
Is the Graf class in a package? If so, that is where the class file needs to be and that is what needs to be on the Main-Class: entry.

The classname does not have the file extension on the end.
No '.class'.
And, as Norm says, should contain the full package name (with '.', not path separators).

Solved thanks a lot you can close :)