Not able to invoke a process for cmd using Runtime.getRuntime()

Runtime rt = Runtime.getRuntime(); 
rt.exec(new String[]{"cmd.exe","/c"}); 

955701 wrote:
Trying to invoke an external thread using Runtime.getRuntime().exec(String command) where command is cmd path.

String command="C:\\Windows\\System32\\cmd.exe;
Runtime.getRuntime().exec(command);

This is supposed to invoke cmd in a separate thread but its not working. In place of cmd, if I use notepad.exe or wmplayer.exe, it works.

Tried the following code in order to capture the invoked cmd thread in a process during runtime and destroy it. But to no avail. The line of code with exec is not invoking the cmd or a batch file.

Process proc= Runtime.getRuntime().exec(command);
proc.destroy();

Any help is greatly appreciated.

int exitCode = proc.waitFor();

linkin wrote:
try this

Runtime rt = Runtime.getRuntime(); 
rt.exec(new String[]{"cmd.exe","/c"}); 

/C      Carries out the command specified by string and then terminates

955701 wrote:
Thank you for replying. I have tried what you have mentioned :

Runtime rt = Runtime.getRuntime();
rt.exec(new String[]{"cmd.exe","/c"});

But it didn't invoke the cmd window.

Runtime rt = Runtime.getRuntime(); 
rt.exec(new String[]{"cmd.exe","/c","start"}); 

1.import java.io.*;
2. 
3.public class Foo {
4. 
5.    public static void main(String[] args) throws IOException {
6.        java.lang.ProcessBuilder pb = new ProcessBuilder("cmd.exe", "/C", "test.bat");
7.        java.lang.Process p = pb.start();
8. 
9.        String line;
10.        BufferedReader r = new BufferedReader(new InputStreamReader(p.getInputStream()));
11.        while ((line = r.readLine()) != null) {
12.            System.out.println(line);
13.        }
14.        r.close();
15.    }
16.} 

rp0428 wrote:
>
Trying to invoke an external thread using Runtime.getRuntime().exec(String command) where command is cmd path.
>
See if the example of running a batch file at the end of this blog does what you want
http://forums.devshed.com/java-help-9/how-to-run-a-batch-file-from-a-java-program-565750.html

1.import java.io.*;
2. 
3.public class Foo {
4. 
5.    public static void main(String[] args) throws IOException {
6.        java.lang.ProcessBuilder pb = new ProcessBuilder("cmd.exe", "/C", "test.bat");
7.        java.lang.Process p = pb.start();
8. 
9.        String line;
10.        BufferedReader r = new BufferedReader(new InputStreamReader(p.getInputStream()));
11.        while ((line = r.readLine()) != null) {
12.            System.out.println(line);
13.        }
14.        r.close();
15.    }
16.} 

rp0428 wrote:
>
Except that that code can deadlock if the process (not Process) stderr buffer fills.
>
Well as with all sample code it is meant to illustrate the basics of how to do what OP wants to do. I assumed it is understood that sample code does not include complete error and exception handling.

955701 wrote:
Hi All,

Basically I was trying to execute a batch file from command prompt. Following piece of code worked. :

Runtime rt = Runtime.getRuntime();
Process proc=rt.exec(new String[]{"cmd.exe","/c", "C:\\Users\\u0160720\\Desktop\\test1.bat"});
int exitCode=proc.waitFor();

Where test1.bat does its specific job.

Thanks!

sabre150 wrote:
Jesus!!!!!!!!! I flippin give up; what is the point of coming to these forums for advice when you just ignore it?