How to Load Order by ID in Magento 2

magento

$orderId = 1; $objectManager = \Magento\Framework\App\ObjectManager::getInstance();        $order = $objectManager->create(‘Magento\Sales\Model\Order’)->load($orderId);                $totall = $order->getGrandTotal();         $shippingAddress = $order->getShippingAddress();         $shippingAddress->getTelephone();          $shippingAddress->getPostcode();          $items = $order->getAllItems();          foreach($items as $i)        {                            $objectManager->create(‘Magento\Catalog\Model\Product’) ->load($i->getProductId())->getSku();                             echo “product sku:”.$_product.”<br/>”;        }