println, print?!

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2 total messages Started by jam Thu, 20 May 1999 00:00

#1135

Author: jam
Date: Thu, 20 May 1999 00:00

26 lines
1339 bytes

Hi, something is really strange with my java program, can anyone pls
help?

At some point of my program, there are the below 2 lines...

     String received = new String(inPL.Msg,0,30);
     System.out.print(received);

Note: inPL.Msg is of type byte[] from a class.
The strange thing is, when I have that in a loop, it doesn't get printed
out if I have it as print, but if i have it as println, it is fine (but
of course I don't want to have a line feed every time!)

In case u need some background of my whole program:
A program with 2 threads, one thread receiving message from a socket,
and the other thread sends out.  The above lines are from my receiving
thread.

Anyone had anything like that happened to them before? if so, how did u
solve it?
Is there anything in java that is kind of like fflush() in C that flush
the stdin/out put??

Thanks heaps

Regards, James.

Re: println, print?!

#1136

Author: James Cribb
Date: Thu, 20 May 1999 00:00

19 lines
1078 bytes

In article <37441330.98141F7D@ihug.com.au>, jam wrote:
| 
|      System.out.print(received);
| 
| The strange thing is, when I have that in a loop, it doesn't get printed
| out if I have it as print, but if i have it as println, it is fine

Sounds like System.out is line-buffered.  You'd expect it to be.

| Is there anything in java that is kind of like fflush() in C that flush
| the stdin/out put??

System.out is a java.io.PrintStream, which has a public void flush() method.
In other words, use

  System.out.flush().

Do you have the manuals for Java?  If not, they're on-line at
http://www.javasoft.com/products/jdk/1.2/docs/index.html

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