Runtime exec() multiple parameters

[martin backman]

I don't know if the header conforms to the actual question, but English is not my native tongue, if not; I'm sorry.

problem:
I execute a command, but when executed the terminal gives me a question to input my password, how do I do this?

Runtime rt = Runtime.getRuntime();
Process proc = rt.exec("username");
proc.waitFor();
proc = rt.exec( "password" );
proc.waitFor();

???

Thanks

[Rob Spoor]

You can write to the process using the Process' getOutputStream method.

[Mike Simmons]

Also, you should probably use getInputStream() to read the question text from the process, as well as read any other output from the process. (Output from the process is input for you.)

You should probably read the classic article When Runtime.exec() won't, as it discusses many common problems with exec(). Note that it was written before JDK 1.5 came out, which included the ProcessBuilder class. ProcessBuilder is basically an improved version of exec(), which solves some problems and gives you more control over some aspects of the process. I recommend you use it instead of exec(). But the JavaWorld article will still be useful to you, as many of the old issues remain.