why the controller class is throwing an error?Please help

Question about the task

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class, interface, or enum expected. file com/codegym/task/task36/task3608/big02/controller/Controller.java, line 2, position 60

1. Create a controller package, and create a Controller class inside it.
This class will receive requests from the client and notify the Model. The Model, in turn, will update the DataModel.

2. Add a Model model field, along with a setter, to the controller.

3. In the controller, create a public void onShowAllUsers() method that accesses the model and triggers the loading the users.

4. Create a view package. Create a View interface inside it.

5. Add two methods to the View interface: void refresh(DataModel dataModel) and void setController(Controller controller).

Requirements:

The Controller class must be created in the controller package.
A private Model model field and corresponding setter must be created in the Controller class.
The Controller class must have a public void onShowAllUsers() method that must call the loadUsers() method on the model.
The View interface must be created in the view package.
Two methods must be declared in the View interface: void refresh(DataModel dataModel) and void setController(Controller controller).

package com.codegym.task.task36.task3608.bean; public class User implements Cloneable { private String name; private final long id; private int level; public static final User NULL_USER = new User(); public User(String name, long id, int level) { this.name = name; this.id = id; this.level = level; } public User() { this("", 0, 0); } // Methods with logic public boolean isNew() { return id == 0; } public User clone() { try { return (User) super.clone(); } catch (CloneNotSupportedException ignored) { return NULL_USER; } } public User clone(long newId) { if (this == NULL_USER) return NULL_USER; return new User(name, newId, level); } ///// getters and setters public String getName() { return name; } public void setName(String name) { this.name = name; } public long getId() { return id; } public int getLevel() { return level; } public void setLevel(int level) { this.level = level; } @Override public String toString() { return "User{" + "name='" + name + '\'' + ", id=" + id + ", level=" + level + '}'; } }