Java为参数分配新值，这被认为是一种不好的做法吗？ [英] Java assigning a new value to a parameter, is this considered a bad practice?

问题描述

我在这里已经阅读了这个问题：为方法参数指定新值是否有问题？。但是我不清楚是否做了类似的事情：

I have read the question here: Is it problematic to assign a new value to a method parameter?. However it is not clear to me if doing something like:

public void myMethod(Object obj) {
    doSomething(obj);
    obj = getNewObj();
}

或：

public void anotherMethod(Object obj) {
     obj = doSomething(obj):
}

这基本上只是为了避免声明一个新的局部变量，这值得吗？这被认为是一种不好的做法吗？

This is basically just to avoid declaring a new local variable, is this worth it?, is this seen as a bad practice?.

推荐答案

这是一种不好的做法。您将很难找到牺牲可读性值得的场景。对于那些不了解Java的按价值传递政策的人来说，这一点尤其令人困惑，遗憾的是很多人。

This is a bad practice. You will be hard pressed to find a scenario where the sacrificed readability is worth it. This will be especially confusing to anyone who doesn't understand Java's "pass by value" policy, which sadly is a lot of people.

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