Using redirection operator ( ) in Runtime.exec()

Question

I am trying to execute a command "cat abc.txt > 123.log" from my Java program using Runtime.exec(). However, the exec() command isnt able to interpret ">" as an operator, instead it uses this as a string. Any suggestions on how I can run the above command using exec()???

Answer 1

hi hiwa,
could u tell me, why dont this
e, why dont this program is not clearing the screen
in linux. though some commands are working like
"poweroff", "reboot"..
public class ExecuteCommand{
public static void main(String[] args) throws
ws Exception{
String[] cmd = {"sh","-c","clear"};
//String cmd = "clear";
Runtime rt = Runtime.getRuntime();
rt.exec(cmd);
Commands like "poweroff" and "reboot" work on underlying system while "clear", "cd" etc.
work on current shell. Current shell is the shell on which we have invoked java command.
But the shell java runtime invokes is not(can't be) current shell but its child, a sub-process.
Thus we don't see current shell window cleared by a java runtime program.