android intent service intentservice example broadcast receiver

public class MainActivity extends AppCompatActivity {
    private Button button;

    @Override

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        MyReceiver myReceiver=new MyReceiver();

        IntentFilter filter=new IntentFilter(MyReceiver.ACTION_CODE);

        registerReceiver(myReceiver,filter);

        button=(Button)findViewById(R.id.button);

        button.setOnClickListener(new View.OnClickListener() {

            @Override            public void onClick(View view) {
                Intent intent=new Intent(MainActivity.this,MyIntentService.class);

                intent.putExtra("msg","fuck java");

                startService(intent); 

           }
        }); 

   }
    public class MyReceiver extends BroadcastReceiver{
        public static final String ACTION_CODE="FUCK JAVA";        @Override        public void onReceive(Context context, Intent intent) {
            Toast.makeText(MainActivity.this,intent.getStringExtra("msg"),Toast.LENGTH_LONG).show();        }
    }
}

//MyIntentService

public class MyIntentService extends IntentService {
    public MyIntentService() {
        super("MyIntentService");    }
    @Override    protected void onHandleIntent(Intent intent) {
        String msg=intent.getStringExtra("msg");

        SystemClock.sleep(3000); 

       Intent intent1=new Intent(); 

       intent1.setAction(MainActivity.MyReceiver.ACTION_CODE);

        intent1.putExtra("msg",msg); 

       sendBroadcast(intent1);    }
}