在 if 语句中使用 == 运算符两次
在java中这样做可以吗，行得通吗？
if (turtles.get(h).getX() == turtles.get(g).getX() == 450) {
//stuff here
}
基本上，我想检查 X 是否与 Y 的值相同，并且该值应该是 450。
Is it okay to do like this in java, does it work?
if (turtles.get(h).getX() == turtles.get(g).getX() == 450) {
//stuff here
}
Basically, i want to check if X is the same value as Y and that value should be 450.
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这是行不通的，因为
==运算符是二进制的。即使它按顺序工作，第一组也会返回一个布尔值，这不会对后面的整数起作用。
That won't work, because the
==operator is binary.And even if it worked sequentially, the first set would return a boolean, which won't work against the integer that follows.
不，它不会起作用，正如其他帖子中所解释的那样。但你可以做
No it won't work, as explained in the other posts. But you could do
不。您预计那里会发生什么？
“a == b”计算为布尔值，因此“int == (int == int)”将计算为“int == boolean”，并且您不能比较 int 和布尔值。
另外，你想在这里做什么逻辑？
if ((a == b) && (b == c))?No. What do you expect to happen there?
"a == b" evaluates into a boolean, so "int == (int == int)" would evaluate into "int == boolean", and you cannot compare and int and a boolean.
Besides, what kind of logic are you trying to do here?
if ((a == b) && (b == c))?不，不是。这是因为
a == b的结果是布尔值。如果你执行a == b == c，你首先会比较a == b，这将返回true或false，然后将该真值与c进行比较。通常不是您想做的事！
请注意，此技巧可以用于赋值，因为
a = b的结果是b（a的新值>) 这意味着a = b = c甚至(a = b) == c偶尔也会有用。No, it's not. This is because the result of
a == bis a boolean. If you doa == b == cyou are first comparinga == bwhich will returntrueorfalseand then comparing that truth value toc.Not what you want to do, usually!
Note that this trick can work for assignment because the result of
a = bisb(the new value ofa) which meansa = b = cor even(a = b) == ccome in useful occasionally.不。它与 (turtles.get(h).getX() ==turtles.get(g).getX()) == 450 - “不可比较类型”相同。
if(turtles.get(h).getX() == 450 &&turtles.get(g).getX() == 450)。No. It is the same as (turtles.get(h).getX() == turtles.get(g).getX()) == 450 - "incomparable types".
if(turtles.get(h).getX() == 450 && turtles.get(g).getX() == 450).或者使用辅助方法避免所有可读性较差（并且容易出错）的重复......
Or avoid all the less-readable (and error-prone) repetition with a helper method...