Error when trying to run "Hello Word" in java, "Editor does not contain a main type"

Question

Guys, I’ve reinstalled, I’ve made step-by-step videos, and I don’t understand why you’re making this mistake in the eclipse. Says the error "Editor does not contains a main type" I put inside the src folder, with package in the hierarchy, all right and keeps saying this: 'Editor does not contains a main type" and the console "No consoles to display at this time."

package com.hello;

public class HelloWord {

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

}