how to execute command line .exe file in java

Question

i want to convert an avi file to 3gp using java program.
For this i am using "E.M. Total Video Converter Command Line 2.43" and the command for it is
"C:\E.M. TVCC>TVCC -f E:\TestVideo\01.avi -o E:\OutputFiles\target.3gp"
I got a program to execute command line exe file on site http://www.rgagnon.com/javadetails/java-0014.html which is:

Path to executable with spaces in them

You can include a path for the program to be executed. On the Win plateform, you need to put the path in quotes if the path contains spaces.

public class Test {
  public static void main(String[] args) throws Exception {
    Process p = Runtime.getRuntime().exec(
       "\"c:/program files/windows/notepad.exe\"");
    p.waitFor();
  }
}

If you need to pass arguments, it's safer to a String array especially if they contain spaces.

String[] cmd = { "myProgram.exe", "-o=This is an option" };
Runtime.getRuntime().exec(cmd);

If using the start command and the path of the file to be started contains a space then you must specified a title to the start command.

String fileName = "c:\\Applications\\My Documents\\test.doc";
String[] commands = {"cmd", "/c", "start", "\"DummyTitle\"",fileName};
Runtime.getRuntime().exec(commands);

***Can anyone help me to put the above command in this code?***I dont know the syntax rules to put that command in the above code.Please help me.

This is the exact java code i am using:

public class Test {
    public static void main(String[] args) throws Exception {

        String[] cmd = { "C:\\Program Files\\E.M. TVCC\\TVCC.exe", "-f C:\\Program Files\\E.M. TVCC\\01.avi", "-o C:\\Program Files\\E.M. TVCC\\target.3gp" };
        Process p = Runtime.getRuntime().exec(cmd);
        p.waitFor();
    }
}

Thank you for reply.i want to put this "C:\E.M. TVCC>TVCC -f E:\TestVideo\01.avi -o E:\OutputFiles\target.3gp" into the above java code. where and how to put it?? — Ishan
– Ishan, Commented Feb 11, 2010 at 11:29

Basics Coding · Accepted Answer · 2015-12-31 10:58:00Z

24

You've got all the pieces in your question. It's just a matter of putting it all together.

Something such as the following should work:

public class Test {
    public static void main(String[] args) throws Exception {

        String[] cmd = { "C:\\E.M. TVCC\\TVCC.exe", "-f E:\\TestVideo\\01.avi", "-o E:\\OutputFiles\\target.3gp" };
        Process p = Runtime.getRuntime().exec(cmd);
        p.waitFor();
    }
}

That said, hard coding paths like this isn't a good idea, you should read them from somewhere; arguments to your program, a properties file, etc.

edited Dec 31, 2015 at 10:58

Basics Coding

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answered Feb 11, 2010 at 11:27

Glen

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6 Comments

Ishan Over a year ago

Thank you for reply.I tried what you had suggested,but it is not workking. Is there any syntax problem here?Because in the command there are spaces in between.how do you handle those?

Glen Over a year ago

@user243680, If it's not working you need to tell us how it's not working. What errors are you getting? Does this compile? Does it run properly? Does it give any errors while running? You should edit your original question and add all of this information to it.

Ishan Over a year ago

Sorry for this sir. It compiles and runs without any error.but does not produce any .3gp file.Any idea why is it so?

Glen Over a year ago

@user243680 Try escaping the \ character. (replace every \ with \\) I've updated my answer to show this.

Glen Over a year ago

@user243680, the code posted above works ok for me. The issue may be with your TVCC executable. Try running it manually and see what happens. Also, edit your answer and copy/paste in the exact java code you're running.

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user1151546 · Accepted Answer · 2013-01-17 08:05:02Z

3

In some cases you want to be able to do more like: - Kill the exe in case it hung. - Be able to abort the exe. - Get the exe output (to the standard output and the standard error) - Run it asynchronously. You can read on a solution at: http://developer4life.blogspot.co.il/2013/01/executing-command-line-executable-from.html

edited Jan 17, 2013 at 8:05

answered Jan 3, 2013 at 10:33

user1151546

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