java (default method)(inheritance-interface)

default method 

package com.company;

interface  mycamera{
     void TakeSnap();
     void recordvideo();
     //default method add kora jay jokhn new inrerface er intilize er sathei method declare korar jonno,
    //jodi pore method declas kora hoy tale r default kaj korbe na
     default  void record4kvideo(){
         System.out.println("recording in 4k......");
     }

}
interface mywifi{
    String[] getNetworks();
    void connecttonetwork(String network);
}

class cellphone{
    void callnumber(int phonenumber){
        System.out.println("calling..."+phonenumber);
    }
    void pickcall(){
        System.out.println("connecting....");
    }

}

class mysmartphone extends cellphone implements mywifi,mycamera {

    public void TakeSnap() {
        System.out.println("taking snap");
    }
    public void record4kvideo() {
        System.out.println("taking snap and hd... record video.   in 4k.....");
    }

    public void recordvideo() {
        System.out.println("taking video");
    }

    public String[] getNetworks() {
        System.out.println("getting list of network");
        String[] networklist = {"voda", "idea", "jio", "airtel"};
        return networklist;
    }
    public  void connecttonetwork(String network) {
        System.out.println("connecting to" +network);
    }

}


public class cwh_chapter11_practiceset {
    public static void main(String[] args) {
    mysmartphone ms= new mysmartphone();
    ms.record4kvideo();
    String[] ar= ms.getNetworks();
        for ( String item:
             ar) {
            System.out.println(item);

        }

        }
    }

inheritance-interface

package com.company;

interface sampleinterface{
    void method1();
    void method2();
}
interface  childsampleinterface extends sampleinterface{
    void method3();
    void method4();

}

class mysampleclass implements childsampleinterface{
    public void method1(){
        System.out.println("method1");
    }
    public void method2(){
        System.out.println("method2");
    }
    public void method3(){
        System.out.println("method3");
    }
    public void method4(){
        System.out.println("method4");
    }
}

public class cwh_chapter11_inheritance_interface {

    public static void main(String[] args) {
        mysampleclass obj =new mysampleclass();
        obj.method1();
        obj.method2();
        obj.method3();
        obj.method4();


    }
}