executing cmd command using a java program

Question

i want to execute the following command using a java program. "java -jar Demo.jar readExcelDemo.Hvd"

public class ExcelDriver {
    public static void main(String[] args) throws IOException {
        Runtime runTime = Runtime.getRuntime();
        Process process = runTime.exec("cmd","/c", "cmd.exe","java -jar Demo readExcelDemo.Hvd");

            }
}

The method exec(String, String[], File) in the type Runtime is not applicable for the arguments (String, String, String, String) — Venkat Kondeti, Dec 18 '14 at 06:35
so what is means is that there is no method that takes 4 string args — Scary Wombat, Dec 18 '14 at 06:39

score 0 · Answer 1 · answered Dec 18 '14 at 06:38

0

create a .bat or .cmd file with content java -jar Demo readExcelDemo.Hvd

change your code to

public class ExcelDriver {
public static void main(String[] args) throws IOException {
    Runtime runTime = Runtime.getRuntime();
    Process process = runTime.exec("cmd","/c", "myfile.cmd");

        }

}

answered Dec 18 '14 at 06:38

Prathap Dudvat

1

1

The method exec(String, String[], File) in the type Runtime is not applicable for the arguments (String, String, String) – Venkat Kondeti Dec 18 '14 at 06:41

Ye Win · Accepted Answer · 2014-12-18T07:39:23.187

0

Try this:

Runtime runTime = Runtime.getRuntime();
Process process = runTime.exec("java -jar Demo.jar readExcelDemo.Hvd");

If above code is not okay, try this:

Runtime runTime = Runtime.getRuntime();
Process process = runTime.exec("cmd.exe /c start java -jar Demo.jar readExcelDemo.Hvd");

If you want to watch cmd, you can use below code. It will immediately close because of the /c flag.

 Process p = runTime.exec("cmd.exe /c start cmd /k java -jar Demo.jar readExcelDemo.Hvd");

edited Dec 18 '14 at 07:39

answered Dec 18 '14 at 06:46

Ye Win

2,020
14
21

If so, this is your command problem i think.Because code is fine. – Ye Win Dec 18 '14 at 06:49
i tried your edit code, it is opening the cmd prompt and immediately its closing. Unable to watch what its printing in console. – Venkat Kondeti Dec 18 '14 at 07:17
If you want to watch cmd, you should pause cmd. – Ye Win Dec 18 '14 at 07:22
"cmd.exe /c start cmd /k java -version" could you please explain one by one in the command. – Venkat Kondeti Dec 18 '14 at 07:42
I deleted java -version to answer cosz this is my test command. /c i already explain and /k for pause the first cmd window.now okay? – Ye Win Dec 18 '14 at 07:46
i want to execute multiple commands like changing the directory and then executing the batch file. – Venkat Kondeti Dec 18 '14 at 07:54
http://stackoverflow.com/questions/4884681/how-to-use-cd-command-using-java-runtime this link will help you. – Ye Win Dec 18 '14 at 07:59

score -1 · Answer 3 · answered Dec 18 '14 at 06:35

-1

You can just call:

Runtime.getRuntime().exec(command);

answered Dec 18 '14 at 06:35

Dara

107
1
7

i did not get any output. – Venkat Kondeti Dec 18 '14 at 06:38
but you get the output by just go to the cmd and type the command? – Dara Dec 18 '14 at 06:41
i want to execute through java program – Venkat Kondeti Dec 18 '14 at 06:44
Sorry, I just want to make sure that the command is working properly. – Dara Dec 18 '14 at 06:47
Anyway, my suggestion is the same to @Ye Win, and the command you raised on the question is wrong. The "Demo" should be "Demo.jar". – Dara Dec 18 '14 at 06:49

executing cmd command using a java program

3 Answers3