"Cannot reduce the visibility of the inherited method from ..." - inteface are implicitly public

http://stackoverflow.com/questions/8584802/reducing-visibility-of-the-java-interface-when-implementing-it-in-an-abstract-cl

interface CFL extends PowerSaver, LightingDevice{
    void showLifeTime();
    void getBrand();
}

interface PowerSaver {
    void showEcoRate();
}

interface LightingDevice {
    void doLight();
}

public abstract class Philips implements CFL{
    void showLifeTime(){}; // ! => Cannot reduce the visibility of the inherited method from CFL.
    void showEcoRate(){};  // ! => Cannot reduce the visibility of the inherited method from CFL.
}
 

Interface implementations must be public.
To understand the error, see the spec:

Every method declaration in the body of an interface is implicitly public.

Therefore, you're actually overriding (or, in this case, implementing) public methods.