为什么我的等式比较使用=（单个等于）在Java中无法正常工作？ [英] Why doesn't my equality comparison using = (a single equals) work correctly in Java?

问题描述

我在以下行中有语法错误。但是我无法理解这个错误的原因是什么。

I have a syntax error in the following line. However I can't understand what is the reason of this error.

if (address1.compareTo(address2) = 1)
        System.out.println(address1 + " is greater than " + address2);

当且仅当 compareTo <时，我想要实现的是打印正确的消息/ code>返回 1 。

推荐答案

你应该比较（ == ）而不是分配（ = ）。这可能非常危险！为了避免这种情况，您可以使用 Yoda表示法，而不是比较

You should compare (==) instead of assigning (=). It can be very dangerous! To avoid such situations you can use Yoda notation so instead of comparing

address1.compareTo(address2) == 1

您可以比较：

1 == address1.compareTo(address2)

如果缺少 = ，则会出现比较错误。

In case of missing =, there will be comparation error.

在您的情况下，它会比较好：

In your case, it would be better to compare:

address1.compareTo(address2) > 0

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