What will be the output of this code?

What will be the output of this code?

class Parent {
  protected Number getValue() { return 10; }
}
class Child extends Parent {
  @Override
  public Integer getValue() { return 20; }
}
public class Test {
  public static void main(String[] args) {
    Parent p = new Child();
    System.out.println(p.getValue());
  }
}