java - Open Command line + inputs for GUI -


i trying write java gui in netbeans executing program on command line, , have piece of code assigned button

private void jbutton1actionperformed(java.awt.event.actionevent evt) {                                              try         {         runtime rt = runtime.getruntime();             process pr = rt.exec("open -a /applications/utilities/terminal.app");               bufferedreader input = new bufferedreader(new inputstreamreader(pr.getinputstream()));              string line=null;              while((line=input.readline()) != null)             {             system.out.println(line);             }              int exitval = pr.waitfor();             system.out.println("exited error code "+exitval);             }       catch(exception e)             {             system.out.println(e.tostring());             e.printstacktrace();             } }

this opens terminal, know how should go inputting commands terminal while still pressing button (ex: "ls", "cd", "javac" etc) thanks!

update: @codebender code looks this. 

runtime rt = runtime.getruntime();     process pr = rt.exec("open -a /applications/utilities/terminal.app");             new printstream(pr.getoutputstream).println("ls");

i getting error "cannot find symbol, symbol: variable getoutputstream, location: variable pr of type process" , red line under getoutputstream. ideas?

@codebender should this?

new printstream(pr.getoutputstream{println("ls")});

use can use outputstream write terminal. wrap printstream make things easier.

process pr = rt.exec("open -a /applications/utilities/terminal.app"); printstream ps = new printstream(pr.getoutputstream()); ps.println("ls" + system.lineseparator()); // follow reading of output terminal.

if terminal.app default linux terminal, instead of opening new 1 can try,

process pr = rt.exec("ls"); // follow reading of output.

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