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Tuấn Nguyễn Beginner
Asked At: 1634156329000 In: Java
Tuấn Nguyễn Beginner Asked At: 1634156329000 In: Java
Optional và Stream trong j
e được biết trong java 8 có optional sẽ dùng để cover NPE tốt hơn, và stream giúp việc thao tác trên các collection dễ dàng hơn chứ không phải tự implement

e muốn hỏi vậy các case nào mình nên dùng đến những cái này ạ, liệu mình có nên lúc nào cx wrapped object bởi optional k ạ? e cảm

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monkey Beginner
Added an answer at: 1634156834000
monkey Beginner
Added an answer at: 1634156834000
Cái này anh thấy nó liên quan nhiều đến phong cách lập trình hơn em ạ, hiện tại thì anh dùng cả 2, khi dùng với dữ liệu mapping, như lập trình với rxjava thì Optional có phần tiện hơn em ạ, ví dụ: 

Single.fromCallable({// hàm})
  .map(optional -> 
     optional.orElseThrow(() -> new IllegalArguementException("test))
</pre>
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