面向对象编程中null的最佳替代方法是什么? [英] What is the best alternative to null in object oriented programming?

问题描述

我不满意避免在OOP中使用null . 有没有其他解决方案? 我不想在以此方式中避免这种情况.

I don't feel satisfied by avoiding null in OOP. Is there any alternative solution? I don't like to avoid it in this way either.

最好的处理方式是什么?

What is the best possible way to handle it?

推荐答案

Java 8具有新的

Java 8 has the new Optional type which is what I think you are asking about

可能包含也可能不包含非null值的容器对象.如果存在值，则isPresent()将返回true，而get()将返回该值.

A container object which may or may not contain a non-null value. If a value is present, isPresent() will return true and get() will return the value.

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