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Tip of the Day
Language: Java
Expertise: Intermediate
Mar 14, 2019

WEBINAR:

On-Demand

Building the Right Environment to Support AI, Machine Learning and Deep Learning


Avoid NPE via JDK 8, Optional

Starting with JDK 8, you can avoid NullPointerException by returning an Optional. For example, instead of returning null, this method returns an empty Optional:

public Optional fetchShoppingCart(long id) {

    ShoppingCart cart = // code that fetch the card content for the specified id

    return Optional.ofNullable(cart);
} 
Octavia Anghel
 
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