How to execute shell script in Java?

It is often necessary to call other scripts (shell, CMD) in Java, which were used previously:

Runtime r = runtime. getsystemruntime (); <br/> r.exe C ("whatever you want to run "); 

However, sometimes the running results are unpredictable, causing a lot of trouble. After Java 5.0, processbuilder to create operating system processes is introduced:

String cmd = "CD.../; LS-L"; // This is the command to execute in the Unix shell <br/> cmd = "CD ~ /Kaven/tools/Dart; SH start_dart.sh "; <br/> // create a process for the shell <br/> processbuilder Pb = new processbuilder (" bash ", "-c", CMD); <br/> Pb. redirecterrorstream (true); // use this to capture messages sent to stderr </P> <p> process shell = Pb. start (); <br/> inputstream shellin = shell. getinputstream (); // This captures the output from the command <br/> int shellexitstatus = shell. waitfor ();// Wait for the shell to finish and get the return code </P> <p> // At this point you can process the output issued by the command <br/> // for instance, this reads the output and writes it to system. out: <br/> int C; <br/> while (C = shellin. read ())! =-1) {<br/> system. out. write (c); <br/>}< br/> // close the stream <br/> try {<br/> shellin. close (); <br/>}< br/> catch (ioexception ignoreme) <br/>{}< br/> system. out. print ("*** end ***" + shellexitstatus); </P> <p> system. out. println (Pb. command (); <br/> system. out. println (Pb. directory (); <br/> system. out. println (Pb. environment (); <br/> system. out. println (system. getenv (); <br/> system. out. println (system. getproperties ());