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Java Forum / GUI / March 2006java program in java GUI
folks I am writing a java GUI that calls other java programs i want to execute java command line options in back ground. I am using java exec command this is part of code Runtime.getRuntime().exec("/root/java/jdk1.5.0_06/bin/java /root/Desktop/project/SAXXMLHandler"); where i want to run SAXXMLHandler java file But i dont get any output thanks > folks > I am writing a java GUI that calls other java programs [quoted text clipped - 8 lines] > > But i dont get any output What output did you expect? We have no clue as to what /root/Desktop/project/SAXXMLHandler is supposed to produce. How do you determine that there is no output?  SignatureNigel Wade, System Administrator, Space Plasma Physics Group, University of Leicester, Leicester, LE1 7RH, UK E-mail : nmw@ion.le.ac.uk Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555 well the output should say that Usuage: java parser as i am not passing any arguments In my command line i do not get anything thanks > well the output should say that > [quoted text clipped - 5 lines] > > thanks See http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Process.html <quote> All its standard io (i.e. stdin, stdout, stderr) operations will be redirected to the parent process through three streams (getOutputStream(), getInputStream(), getErrorStream()). The parent process uses these streams to feed input to and get output from the subprocess. Because some native platforms only provide limited buffer size for standard input and output streams, failure to promptly write the input stream or read the output stream of the subprocess may cause the subprocess to block, and even deadlock. </quote> - Oliver > well the output should say that > [quoted text clipped - 5 lines] > > thanks you need to "process" the output by getting the standard streams from the new process. Probably best to start new threads to do this if you don't want to hold up your "parent" program. how do i do that i mean start new threads thanks > how do i do that > i mean start new threads > thanks A google search for "java thread" (without the quotes) gives me: http://java.sun.com/docs/books/tutorial/essential/threads/ - Oliver Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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