什么是“for（;;）”循环用于？ [重复]

Possible Duplicate:
Infinite loop application - for(;;)

可能重复：无限循环应用程序 - for（;;）

I am a Java developer, and I saw this in one of the classes:

我是一名Java开发人员，我在其中一个类中看到了这个：

for(;;){
something goes here
}

What does this loop mean? When would we have to use it?

这个循环是什么意思？我们何时才能使用它？

Thanks

谢谢

5 个解决方案

#1

It's an infinite loop, an equivalent of this could be

这是一个无限循环，相当于这个

while(true) which is definitely used a lot more than an infinite for loop.

而（true）肯定比无限循环使用更多。

But they both mean the same thing in this situation.

但在这种情况下，它们都意味着同样的事情。

#2

It's an infinite loop. Similar to while(true) { ... } or do { ... } while(true);. A reason you might use this is if in the something goes here part, you have a break; with a complex condition.

这是一个无限循环。类似于while（true）{...}或do {...} while（true）;.你可能会使用这个的一个原因是，如果在这里的某些部分，你有一个休息;条件复杂。

For simple break conditions, it's easier to just put them in the loop statement.

对于简单的中断条件，将它们放在循环语句中更容易。

#3

It's the same as

它是一样的

while(true)

However it's less used and in general should be avoided.

然而，它的使用较少，一般应避免使用。

#4

It's an infinite loop, equivalent to more readable while(true).

它是一个无限循环，相当于更可读的while（true）。

Such a loop is not used often, it typically represents operations that should continue running as long as the application runs. E.g:

这种循环不经常使用，它通常表示只要应用程序运行就应该继续运行的操作。例如：

server thread accepting connections

服务器线程接受连接
cleanup process sleeping for some time

清理过程睡了一段时间
reading infinite input with pauses

通过暂停读取无限输入

The only way to escape such a loop is:

逃避这种循环的唯一方法是：

break

打破
throwing an exception

抛出异常
interrupting a thread (equivalent to throwing an InterruptedException inside a loop)

中断线程（相当于在循环中抛出InterruptedException）

#5

This is an infinite loop. The idea is that a break condition is inside the loop

这是一个无限循环。想法是循环内部有一个中断条件

int i=0;
for(;;)
{
    i++;
    if (i>10) break;
}

#1