PrintWriter线程安全吗？ [英] Is PrintWriter threadsafe?
问题描述
多个线程可以同时使用相同的PrintWriter吗？
Is it OK for multiple threads to use the same PrintWriter concurrently?
推荐答案
" Jeff Schwab" < JE ****** @ comcast.net>在消息中写道
新闻：rY ******************** @ comcast.com ...
"Jeff Schwab" <je******@comcast.net> wrote in message
news:rY********************@comcast.com...
是可以让多个线程同时使用同一个PrintWriter吗？
Is it OK for multiple threads to use the same PrintWriter concurrently?
在这种情况下你会考虑线程安全行为吗？
Silvio Bierman
What would you consider threadsafe behaviour in such a scenario?
Silvio Bierman
Silvio Bierman写道：
Silvio Bierman wrote:
" Jeff Schwab" < JE ****** @ comcast.net>在消息中写道
新闻：rY ******************** @ comcast.com ...
"Jeff Schwab" <je******@comcast.net> wrote in message
news:rY********************@comcast.com...
是多个线程可以同时使用相同的PrintWriter吗？
Is it OK for multiple threads to use the same PrintWriter concurrently?
在这种情况下你会考虑线程安全行为吗？
What would you consider threadsafe behaviour in such a scenario?
好问题。我只是想确保I / O系统不会被混淆。如果两个线程的输出交织在一起就没关系。
Good question. I just want to make sure the I/O system won''t get
confused. It''s OK if the output of the two threads is intertwined.
你是否介意单词或单词中的字符是否混合？
线程1试图打印线程1 ABCDEF
线程2试图打印线程2 GHIJKLM
以下是OK ？
" TThhr 1 eadAe 2a GHd ABCIJKLMDEF"
我认为您应该同步实际的IO调用。我们所做的是利用一个
消息队列;
不同的线程丢弃队列中的消息对象，而低优先级的
线程等待<队列中的
，弹出消息，执行IO，然后等待下一个
消息。因此只有一个低优先级的线程实际上正在执行IO。
Jeff Schwab < JE ****** @ comcast.net>在消息中写道
news：eu ******************** @ comcast.com ...
Do you mind if characters within words or words are mixed?
Thread 1 trys to print "Thread 1 ABCDEF"
Thread 2 trys to print "Thread 2 GHIJKLM"
Is the following OK?
"TThhr 1 eadAe 2a GHd ABCIJKLMDEF"
I think you should synchronize the actual IO call. What we do is utilize a
message queue;
the different threads drop message objects in the queue while a low-priority
thread waits
on the queue, pops off a message, does the IO, then waits for the next
message. So only
one, low-priority, thread is actually doing the IO.
"Jeff Schwab" <je******@comcast.net> wrote in message
news:eu********************@comcast.com...
Silvio Bierman写道：
Silvio Bierman wrote:
" Jeff Schwab" < JE ****** @ comcast.net>在消息中写道
新闻：rY ******************** @ comcast.com ...
"Jeff Schwab" <je******@comcast.net> wrote in message
news:rY********************@comcast.com...
是多个线程可以同时使用相同的PrintWriter吗？
Is it OK for multiple threads to use the same PrintWriter concurrently?
在这种情况下你会考虑线程安全行为？
What would you consider threadsafe behaviour in such a scenario?
好问题。我只是想确保I / O系统不会混淆。如果两个线程的输出交织在一起就没关系。
Good question. I just want to make sure the I/O system won''t get
confused. It''s OK if the output of the two threads is intertwined.
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