Polymorphism in Interfaces In Java

 package com.company;

interface Camera{
    void takeSnap();
    void recordVideo();
    default void record4KVideo(){
//        We can override this default method in the class but then this method will not work
//        instead the method in class will work.
        System.out.println("Recording In 4k ...");
    }
}

interface Wifi{
    String [] getNetwork();
    void connectToNetwork(String network);
}


class CellPhone{
    void callNumber(int phoneNumber){
        System.out.println("Calling"+ phoneNumber);
    }
    void pickCall(){
        System.out.println("Connecting ...");
    }


}

class SmartPhone extends CellPhone implements Wifi, Camera{
    public void takeSnap(){
        System.out.println("Taking Snap");
    }
    public void recordVideo(){
        System.out.println("Taking Videp");
    }
    public String[] getNetwork(){
        System.out.println("Getting the list of networks ...");
        String[] networkList = {"Digisol", "UCN_Dr_Sonone"};
        return networkList;
    }
    public void connectToNetwork(String network){
        System.out.println("Connecting to "+ network + " ...");
        System.out.println("Connected");
    }

}

public class tuts {
    public static void main(String[] args) {
        Camera cam = new SmartPhone();
//        cam.getNetwork(); --> not allowed
        cam.record4KVideo(); // This is a smartphone but use it as a camera.
    }
}