How to execute cmd command in Java class?

Question

I want to call cmd command in java code. I say:

String str ="C:/uploaded_files/111.txt";
Process process = Runtime.getRuntime().exec(new String[]{"cmd.exe", "/c",str});
System.out.println(str);

And dont get 111.txt. Its strange because when this code was in jsp all works fine. What can be wrong?

What outcome would you expect from running the program, and what do you actually get? — Gustav Grusell, Dec 25 '12 at 09:01
Follow the same advice I gave in comment to [this answer](http://stackoverflow.com/q/14029122/418556). — Andrew Thompson, Dec 25 '12 at 09:04
@Gustav Grusell Hmm i want to get 111.txt in `C:/uploaded_files` folder. But folder still empty. — Kliver Max, Dec 25 '12 at 09:04
Well he most likely got just the String printed. He never asked for the process output. — Noctua, Dec 25 '12 at 09:04
If you are not getting the files in C:/uploaded_files then thats a problem in different part of our code. — Jayamohan, Dec 25 '12 at 09:06
@KliverMax are you having the file 111.txt in C:/uploaded_files? — Jayamohan, Dec 25 '12 at 09:10
What are you trying to do? Open an existing file? Runtime.getRuntime().exec(new String[]{"notepad", str}) or create a new file? Runtime.getRuntime().exec(new String[]{"cmd", "/c","echo", "some text", ">", str}) but a better solution would be new File(str).createNewFile(); — Tesseract, Dec 25 '12 at 09:15

Nidhish Krishnan · Accepted Answer · 2012-12-25T09:15:24.837

3

what's the problem with this code. It's perfectly working. opens and shows content of the file 111.txt

try {
    String str ="C:/uploaded_files/111.txt";
    Process process = Runtime.getRuntime().exec(new String[]{"cmd.exe", "/c",str});
    System.out.println(str);
    } catch (Exception ex) {}

please check whether the path is correct and whether the directories and files are not missed or spelled

edited Dec 25 '12 at 09:15

answered Dec 25 '12 at 09:09

Nidhish Krishnan

20,593
6
63
76

score 0 · Answer 2 · answered Dec 25 '12 at 09:06

0

I hope It is not cmd.exe Please try this:

String[] command = new String[3];
command[0] = "cmd";
command[1] = "/c";
command[2] = "C:/uploaded_files/111.txt";

Process p = Runtime.getRuntime().exec (command);

answered Dec 25 '12 at 09:06

Harish Raj

1,565
3
17
27

What you mean `I hope It is not cmd.exe`? – Kliver Max Dec 25 '12 at 09:10

score 0 · Answer 3 · answered Dec 25 '12 at 09:07

0

If you want to open the file in notepad try this.

String file = "C:/uploaded_files/111.txt";

Runtime.getRuntime().exec("cmd", "/c", "notepad.exe", file);

Hope it's the one you want.

answered Dec 25 '12 at 09:07

Sri Harsha Chilakapati

11,744
6
50
91

How to execute cmd command in Java class?

3 Answers3

Linked