uptime command and windows

[skarosi]

Dear all,
i need to get some basic information for the computer that i run my programm.
i know that there is a command like for unix called "uptime" and it gets u all i need.
is there anything for windows? i found and downloaded an uptime command for windows, but it is not from MS, but that would b ok.
anyway, my java question now. i need to access this command "uptime" from inside the programm and to return a string. how can i do that?
i guess this is the same for all msdos command lines for java.
will it be the same if i run it in unix as well?
i must b a cross platform programm.
thanks, Ilias

 

[Diancecht]

I doubt you can give a cross-platform solution if you use native command lines. Well, maybe an if could do the trick.

Anyway, you should take a look at System.exec() command. Search for that in this forum, there are plenty of examples.

Cheers,

Dian

 

[skarosi]

first of all thanks for your help,
now, i searched the forums for the System.exec(), but i didnt get anything usufull. there are only 3 posts for java, and they are not actually what i am looking for.

i also checked on the Sun API, but it doesnt even exist there.
could u just tell me how i can use this?
i tried
System.exec(uptime)
and
System.exec("uptime")

but they are both return an error
uptime is the command line in dos by the way.
thanks

 

[Bong]

Look here:

http://www.javaalmanac.com/egs/java.lang/Exec.html

_________________
Bob Rashkin
rrashkin@csc.com

 

[Diancecht]

Arghh, my fault, its Runtime.exec().

You can take a look at

http://www.tek-tips.com/viewthread.cfm?qid=871224

Sorry,

dian

 

[skarosi]

Thanks both, but as i said in my first post, i want to read the result of the command, so Bong, the post Dian said is much better.
i have a problem with the InputStream() method, but i will find a way.
thanks again guys

 

[skarosi]

OK, i love programming, and i think that i am quite good at it, when i know what i am doing, and i like java, but some times is sooo hard to realise what on earth is wrong!
like now, why do it get an error on this line:
BufferedReader br = new BufferedReader(new InputStreamReader(p.InputStream()));
on the InputStream()
i import java.io.*; where Input stream is.
what more does it need?

 

[Diancecht]

That's what APIs are for. I guess p is an instance of Process class, so the method you're looking for is not InputStream but getInputStream.

Cheers,

Dian

 

[skarosi]

i am looking at the API, but cnat find anything! i was looking at the inputStream, and now on the getInputStream, they both uses java.io, so i import this, and also i try with java.net and java.lang, but nothing!
ilias

 

[sedj]

Post the actual error ...

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[sedj]

Incidentally, you would read the process output like so :

Process p= Runtime.getRuntime().exec("C:/full/path/to/uptime");
BufferedReader br = new BufferedReader(new InputStreamReader(p.InputStream()));
String line = "";
while ((line = br.readLine()) != null) {
  System.out.println(line)
}

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[skarosi]

ok, it worked out. it was a matter of restarting the dosprompt.
thanks for your help everybody
Ilias

 

[Diancecht]

Once a again. It should be

p.getInputSream()

Here's the API link:

http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Process.html

Cheers,

Dian