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Language: Java
Expertise: Intermediate
Mar 14, 2019
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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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