bash - Displaying a script's stdin within Java -

at moment, have java program executes script input.sh external process. script echos line user has entered, added history functionality.

here code input.sh:

#!/bin/sh ifs="" while read -e line     echo $line     history -s $line done 

and here java code program main.java:

public class main {     static public void main(string[] args) {         try {             processbuilder pb = new processbuilder().redirectinput(processbuilder.redirect.inherit);             process script = pb.command("/bin/sh", "-i","input.sh").start();              bufferedreader br = new bufferedreader(new inputstreamreader(script.getinputstream()));             string line = null;             system.out.println("starting");              while ((line = br.readline()) != null) {                 system.out.println(line);             }         }         catch (ioexception e) {         }     } } 

now, when execute ./input.sh in terminal, script behaves should. display user has entered, move cursor when left , right arrow keys pressed (instead of showing ^[[d), pressing , down navigate through entered commands, , pressing enter print user has typed. however, when execute java program, cannot see typing, display results fine.

can tell me why characters showing when inputting java program? thanks