Main method not found?

I get this error in the workspace and dont know what to do:

Error: Main method not found in class PezDispenser, please define the main method as:
public static void main(String[] args)
or a JavaFX application class must extend javafx.application.Application

This is the code:

public class Example {

public static void main(String[] args) {
    // Your amazing code goes here...
    System.out.println("We are making a new Pez Dispenser.");
    PezDispenser dispenser = new PezDispenser("Yoda");
    System.out.printf("The dispenser character is %s\n",dispenser.getCharacterName());

  if (dispenser.isEmpty()) {
    System.out.println("It is cyrrently empty");
  }
  System.out.println("Loading...");
  dispenser.load();

  if (!dispenser.isEmpty()){
    System.out.println("It is no longer empty");
  }

}

}

AND :

public class PezDispenser {

public static final int MAX_PEZ = 12;

private String mCharacterName; private int mPezCount;

public PezDispenser(String characterName){ mCharacterName = characterName; mPezCount = 0; }

public boolean isEmpty(){ return mPezCount == 0; }

public void load() { mPezCount = MAX_PEZ; }

public String getCharacterName(){ return mCharacterName; }

}

I didn't change anything, in previous video this code worked well, and after without changing anything i get this error.