redirecting output of command prompt to a text file using java in windows

Question

I am launching command prompt using java by following code

Runtime rt = Runtime.getRuntime();
Process proc = rt.exec("cmd /c start cmd.exe /K \"dir > D:\test1.txt");

after executing second line I am getting error as 'Access is denied' and I can't redirect output of command prompt to a text file.

Can somebody please help?

Answer 1

Double the backslash after D: , so that it's not inserting a tab ( \\t ) in the command string:

Process proc = rt.exec("cmd /c start cmd.exe /K \"dir > D:\\test1.txt");

You will also need to fix that quote ( \\" ) you inserted, because it's not ended. Either remove it, or add an appropriate end-quote (at the end?).

Answer 2

You can use

Process proc = rt.exec("cmd /c start cmd.exe /K \"dir);

 OutputStream = proc.getOutputStream();

And then write the output to the file

Backslashes are used before escape characters in java. You need to format the path properly