What is the solution of this error Could not find or load main class

Question

I want to run my Java code in terminal (ubuntu Linux)

I faced this error:

Could not find or load main class

package javaapplication7;

public class CannyEdgeDetectorSeq {
    public static void main(String args[]) throws Exception {
    }
}

and i used the command:

javac  CannyEdgeDetectorSeq.java
java CannyEdgeDetectorSeq

how I can run my code? maybe I missed some thing likes define jar file????

Have you checked if a CannyEdgeDetectorSeq.class was created after `javac CannyEdgeDetectorSeq.java` — F.Igor, Oct 16 '17 at 13:55
Maybe start with an [introductionary tutorial](https://docs.oracle.com/javase/tutorial/getStarted/cupojava/unix.html)? — M. le Rutte, Oct 16 '17 at 14:08

score 1 · Answer 1 · answered Oct 16 '17 at 14:12

If you need to run a single class, you don't need a package declaration, only class declaration:

public class CannyEdgeDetectorSeq
{
    public static void main(String args[]) throws Exception{
    }
}

If you want to specify a package, then you must put the original source code in a sub-folder named javaapplication7, and then, from the root directory:

javac javaapplication7/CannyEdgeDetectorSeq.java
java javaapplication7.CannyEdgeDetectorSeq

this class have many function, i tried i got the same error – Njood Alassmi Oct 16 '17 at 14:16 — Njood Alassmi, Oct 16 '17 at 14:16

What is the solution of this error Could not find or load main class

1 Answers1