whats the reason for the "could not find or load main class "error?

Question

more explanation:while writing the regular "HELLO WORD" code I always face this error-noticing that the compilation goes without any errors(I mean this error appear when running) & that I use TEXTPAD for writing java programs

The code is

class HelloWorld 
{ 
    public static void main (String args[]) 
    { 
        System.out.println(“Hello World!”); 
    } 
}

Post the package where the class file is generated and how you run the program i.e. the command line. — Luiggi Mendoza, Oct 15 '13 at 14:26
Please, considering pasting a code that serve as example of your problem, we are smart people but cannot dig into your brain by the internet, neither in person if you are thinking... — RamonBoza, Oct 15 '13 at 14:27
have you put your main method in the same class where you're running? — Parth Soni, Oct 15 '13 at 14:28
`class HelloWorld { public static void main (String args[]) { System.out.println(“Hello World!”); } }` — Hanadi Alzayed, Oct 15 '13 at 14:28
and how do you compile them? javac HelloWorld.java and then java HelloWorld ? take into consideration capital letters — RamonBoza, Oct 15 '13 at 14:30
if you're running it from the command line, make sure you're running the `.class` file and not the `.java` file — Paul Samsotha, Oct 15 '13 at 14:33
I compile them by going to tools then external tools then compile java I said yhat I use the textpad! — Hanadi Alzayed, Oct 15 '13 at 14:37
There is nothing inherently wrong with your code. The error is likely due to the way you are launching the program. This is why people are asking all the questions in the comments. You should provide a more complete example so your error is reproducible. — Viktor Seifert, Oct 15 '13 at 15:03

score 1 · Answer 1 · answered Oct 15 '13 at 14:35

HelloWorld from scratch:

Create a folder to do the hello world code

cd ~
mkdir test
cd test

Create and edit the HelloWorld file

gedit HelloWorld.java

code:

public class HelloWorld{
    public static void main(String[] args){
        System.out.println("Hello world!");
    }
}

Save and compile, take care of capital letters.

javac HelloWorld.java

Execute

java HelloWorld

output:

Hello world!

whats the reason for the "could not find or load main class "error?

1 Answers1