java - Send Parameter To Runtime.getRuntime().exec() After Execution -

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i need execute command in java program after executing command , required parameter ( password in case ). how can manage output process of runtime.getruntime().exec() accept parameter further execution ?

i tried new bufferedwriter(new outputstreamwriter(signingprocess.getoutputstream())).write("123456"); did not work.

does program not feature --password option ? command line based programs do, scripts.

runtime.getruntime().exec(new string[]{"your-program", "--password="+pwd, "some-more-options"});

or more complicated way , more error-prone:

try {     final process process = runtime.getruntime().exec(             new string[] { "your-program", "some-more-parameters" });     if (process != null) {         new thread(new runnable() {             @override             public void run() {                 try {                     datainputstream in = new datainputstream(                             process.getinputstream());                     bufferedreader br = new bufferedreader(                             new inputstreamreader(in));                     string line;                     while ((line = br.readline()) != null) {                         // handle input here ... ->                         // if(line.equals("enter password:")) { ... }                     }                     in.close();                 } catch (exception e) {                     // handle exception here ...                 }             }         }).start();     }     process.waitfor();     if (process.exitvalue() == 0) {         // process exited ...     } else {         // process failed ...     } } catch (exception ex) {     // handle exception }

this sample opens new thread (keep in mind concurrency , synchronisation) that's going read output of process. similar can feed process input long has not terminated:

if (process != null) {     new thread(new runnable() {         @override         public void run() {             try {                 dataoutputstream out = new dataoutputstream(                         process.getoutputstream());                 bufferedwriter bw = new bufferedwriter(                         new outputstreamwriter(out));                 bw.write("feed process data ...");                 bw.write("feed process data ...");                 out.close();             } catch (exception e) {                 // handle exception here ...             }         }     }).start(); }

hope helps.


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