xml - Java: how to check if a program has been correctly launched? -

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i developping little java jar application storage data in file.xml using basex server. @ beginning, before main program starts, need basex server correctly launched , activated. here do:

runtime runtime = runtime.getruntime();  if (iswindows(os)) {     process server = runtime.exec("cmd /c basexserver.bat");     system.out.println(server.waitfor());  }  else {     if (islinux(os)) {         runtime.exec("basexserver");     } }

to check if basexserver correctly running have tried check value returned waitfor method , if value equal 0 command executed while if returned value greater 0 error has occurred. problem method returns 1 command "basexserver.bat" correct. why?

if process goes background after start, can check exitvalue() zero. secondly can attache error , standard outputs methods geterrorstream() , getinputstream(). , monitor them error messages. have @ stream gobbler pattern also, useful. process can stuck if it's output not consumed.

https://docs.oracle.com/javase/7/docs/api/java/lang/process.html http://www.javaworld.com/article/2071275/core-java/when-runtime-exec---won-t.html


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