how to show icon in dart

icon.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home:Icon(
        Icons.image,
        size: 64.0,
        color: Theme.of(context).primaryColor,
      ),
    );
  }
}