Error: Could not find or load main class ClassDemo

Question

The code below compiled successfully here https://www.compilejava.net/ but execution fails

Error: Could not find or load main class ClassDemo

whereas it does have a main entry point. Why ?

package com.tutorialspoint;

import java.lang.reflect.*;

public class ClassDemo {

   public static void main(String[] args) {

     try {            
        ClassDemo c = new ClassDemo();
        Class cls = c.getClass();

        // returns the array of Field objects
        Field[] fields = cls.getDeclaredFields();
        for(int i = 0; i < fields.length; i++) {
           System.out.println("Field = " + fields[i].toString());
        }
     }
     catch(Exception e) {
        System.out.println(e.toString());
     }
   }

   public ClassDemo() {
      // no argument constructor
   }

   public ClassDemo(long l, int i) {
      this.l = l;
      this.i = i;
   }

   long l = 77688;
   int i = 3;
}

how do you try to run the code? – Stultuske Apr 04 '16 at 12:33 — Stultuske, Apr 04 '16 at 12:33
It compiles and executes very well on my computer. – dryairship Apr 04 '16 at 12:33 — dryairship, Apr 04 '16 at 12:33
as I said I use the compile and execute online site – user310291 Apr 04 '16 at 12:33 — user310291, Apr 04 '16 at 12:33
@Hackerdarshi ok so it must be the site that doesn't work – user310291 Apr 04 '16 at 12:34 — user310291, Apr 04 '16 at 12:34

score 4 · Accepted Answer · answered Apr 04 '16 at 12:34

4

You need to remove the package identifier from your code (first line) since you are using an online compiler/executor.

Hope this helps.

answered Apr 04 '16 at 12:34

Mohamed Bayoumi

56
4

score 1 · Answer 2 · answered Apr 04 '16 at 12:34

1

It's because you have a package statement.

Remove that and it will work just fine.

answered Apr 04 '16 at 12:34

Stultuske

9,296
1
25
37

Error: Could not find or load main class ClassDemo

2 Answers2

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