Java 使用三元运算符“什么都不做”
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"Do nothing" using ternary operator
提问by domi
I want to use the ternary operator like this - checking only the truepart of the statement:
我想像这样使用三元运算符 - 只检查true语句的一部分：
foo() ? bar() : /* Do nothing */;
Is it possible to exclude the logic of the "else" part of this statement? I tried using return;but the compiler gives the error. Basically all I want to achieve is a statement using ternary operator which would look like this:
是否可以排除此语句的“else”部分的逻辑？我尝试使用return;但编译器给出了错误。基本上我想要实现的是使用三元运算符的语句，如下所示：
foo() ? bar();
Is this achievable?
这是可以实现的吗？
采纳答案by wvdz
The ternary operator is usually used to immediately assign a value.
三元运算符通常用于立即赋值。
String a = bar() ? foo() : null;
For your usecase, you can simply use an if construct:
对于您的用例，您可以简单地使用 if 构造：
if (foo())
bar();
回答by A.v
If it would work like that we wouldn't call it ternary anymore. I think the only way is that do something which does nothing. for example call a method which has empty body, or if you assign a value from this operation to a variable just assign a default value.
如果它像那样工作，我们就不会再称它为三元了。我认为唯一的方法是做一些什么都不做的事情。例如调用一个具有空主体的方法，或者如果您将此操作的值分配给变量，则只需分配一个默认值。
