how to run a command in ubuntu terminal

[bean]

hi im trying to run a few commands in a ubuntu terminal the problem is the last command isint executing

String product=command1+"\n"+command2+"\n"+command3+"\n"+command4+"\n";
System.out.println(product);
Process child3 = Runtime.getRuntime().exec(product);

if i copy and paste into a terminal it works untill command4 when i have to hit enter to execute command4 which i think is the problem, i tought \n would run the last command as it does the rest but it doesint.

any ideas thanks.

[KevinWorkman]

I would use a ProcessBuilder instead, and then redirect the input and output of the Process so you can see any error messages.