Given a method in a protected class, access modifier must be used to restrict access to that method to only the other members of the same class.

The access modifier that should be used to restrict access to a method to only the other members of the same class is the "private" access modifier. Here are the steps to do it:

1. Define your class. For example, let's call it MyClass.

public class MyClass {
    // class body
}

2. Inside your class, define your method and precede its declaration with the private keyword. For example, let's create a method called myMethod.

public class MyClass {
    private void myMethod() {
        // method body
    }
}

Now, myMethod is only accessible within MyClass. Other classes, even subclasses, cannot access this method.

Remember, the private access modifier is the most restrictive. If you want to allow access to members of subclasses or classes within the same package, consider using protected or package-private (no explicit modifier), respectively.