Question

http://pastebin.com/1btVw8Cb

There are two classes in the above code.

So above is my code which is working fine when I hit run in Eclipse, runs fine in Netbeans as well.

I am trying to create a standalone application, a jar file.

The error I get when I double my jar is:

Could not find the main class: NewJFrame. Program will exit.
I get the following from the command promt:

E:\Java Programs\Eclipse Workspace\test3\src\test3>java testT.jar
Exception in thread "main" java.lang.NoClassDefFoundError: testT/jar
Caused by: java.lang.ClassNotFoundException: testT.jar
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Could not find the main class: testT.jar.  Program will exit.

I followed the command from here: "Could not find the main class: XX. Program will exit."
So this is what I am typing in the command promt to create my jar:

E:\Java Programs\Eclipse Workspace\test3\src\test3>jar cfm MyJar.jar manifest.tx
t *.class SINGLE.TXT

https://i.stack.imgur.com/ncm1q.jpg

Some shots above I took to show the process.

So I think the problem could be error when I do javac? But it builds fine and runs fine in netbeans and eclipse >< Please help.

Answer 1

it is now working. I have not changed anything, maybe the memory got curroupted and that is why it was giving me problems. I think restart the computer is what fixed it. But yea, I don’t know for sure what was wrong, though it is working fine now. So thank you for your help guys