java - unix command line program does not exit after closing stdin -

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• why aren't windows batch files processing when java executes them? 2 answers

i create process object in java (the program html tidy if important), feed data via stdin (process.getoutputstream()), , closed stream, when call process.waitfor() never returns because process doesn't exit. how fix without calling process.destroy()?

it possible tidy waiting consume output before exits. if feed program lot of data , returning lot of data you. solution consume output before waiting program exit. how handling (not full code):

    processbuilder builder = new processbuilder();     //-*snip*-     process p = null;     throwable error = null;     int returncode = -1;     string output = null;     stringbuilder stderr = new stringbuilder(200);     try{         p = builder.start();         try (writer w = new bufferedwriter(new outputstreamwriter(p.                 getoutputstream()))){             w.write(html);         }         process reference = p;         //read both outputs tidy has no reason wait         thread errreader = new thread(()->{             stringbuilderwriter writer = new stringbuilderwriter(stderr);             try {                 ioutils.copy(reference.geterrorstream(), writer,                         charsets.utf_8);             }             catch (ioexception ex) {                 //nom...                 //an ioe happens here happen when reading                 //stdout well.             }         });         errreader.start();         //tidy might waiting consume output         output = ioutils.tostring(p.getinputstream());         returncode = p.waitfor();         errreader.join();     }