java.lang.NoClassDefFoundError: Main
Caused by: java.lang.ClassNotFoundException: Main
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: Main.  Program will exit.
Exception in thread "main" Java Result: 1

after i had done my system. this error message pop up and restricted me to launch my system. anyone here can give some advise so that i can solve this problem?

thanks

The compiler states that he cannot found the class named Main. Can you post your code?

package PSMS1;

import PSMS.function.executeLookAndFeel;

public class Main {

    public static void main(String[] args) {
        new executeLookAndFeel().initLookAndFeel();
        LoginScreen ls = new LoginScreen();
        ls.setVisible(true);
    }
}

you mean this?

please check your classpath

as well as make the main method static

i think this is sufficient to run your program

the class path is correct
but i not so sure what you mean about make the main method into static?
sorry that im still a newbie

stupid post, ignore

your main method is static, im not sure why it wouldnt be working

stupid post, ignore

your main method is static, im not sure why it wouldnt be working

im sorry about the "stupid post"
but i really cant find the solution why it happens to my system.

What is the name of the file containing the class?

the file name is PSMS
and the package name is PSMS1
the file path is correct

The file name has to be the same name as the class - class Main has to reside in the file Main.java.

okay guys i got it =D
i just found the solution. cause im using netbeans

just go into netbeats>right click and choose properties of the system folder>choose run>browse and choose the main to run the program.

Thanks everyone for the help!
thanks alot =D

yes, i finally got it =D
thanks guys for helping here.

solution:
(im using netbeans as IDE)
open netbeans> right click on the folder and choose properties> click run> browse the folder and re-select the main class.

that's it =D
once again, thanks!

im sorry about the "stupid post"
but i really cant find the solution why it happens to my system.

Sorry!!! I wasn't calling your post stupid! My reply was very stupid (I was telling you how to use a main method, because I mistook your main class as the method meaning it was upper case M and not static and didnt accept string args... ect ect

I realised my post was wrong and edited it deleting the contents an replacing it with stupid post. Then I edited it again because your main method was static and the poster above told you to make it static - this made my post more than just "stupid post, ignore" and made the meaning of that line a bit confusing i think...

Sorry again! Didn't intent do call your post stupid - I dont know the answer lol