Java Adapter Pattern with PhoneCharger Example

This example's subject is example of adapter pattern.

There is entity class "Phone". This is empty entity. ISamsungCharger, IIphoneCharger are interface.
SamsungChargerImpl and IphoneChargerImpl are implemantations. User can use samsungcharger or iphonecharger.  Samsung adapter provides to use iphonecharger as samsungcharger.

Whole code is above:

package com.design.pattern.adapter;

public class PhoneAdapterExample {

    public static void main(String[] args) {
        User user;
        Phone phone = new Phone();
        ISamsungCharger samsungCharger = new PhoneAdapterExample.SumsungChargerImpl();
        IIphoneCharger iphoneCharger = new PhoneAdapterExample.IphoneChargerImpl();

        user = new PhoneAdapterExample.User(phone);
        user.useCharger(samsungCharger);

        //user.useCharger(iphoneCharger); this get compile error
        System.out.println("after adapter");
        samsungCharger = new PhoneAdapterExample.SamsungAdapter(iphoneCharger);
        user.useCharger(samsungCharger);

    }

    static class User{
        private Phone phone;

        public User(Phone phone) {
            this.phone = phone;
        }

        public void useCharger(ISamsungCharger charger){
            charger.charge(phone);
        }
    }

    static class Phone{}

    interface ISamsungCharger{
        public void charge(Phone phone);
    }

    static class SumsungChargerImpl implements ISamsungCharger{

        @Override
        public void charge(Phone phone) {}

    }

    interface IIphoneCharger{
        public void chargeDifferently(Phone phone);
    }

    static class IphoneChargerImpl implements IIphoneCharger{

        @Override
        public void chargeDifferently(Phone phone) {}

    }

    static class SamsungAdapter implements ISamsungCharger{

        private IIphoneCharger iphoneCharger;

        public SamsungAdapter(IIphoneCharger iphoneCharger) {
            this.iphoneCharger = iphoneCharger;
        }

        @Override
        public void charge(Phone phone) {
            iphoneCharger.chargeDifferently(phone);
        }
    }
}