UNIX "export" Command from Java

Question

Hi,
Am facing a problem while exeuting UNIX command from java. Am attaching the code which I am trying to execute.
import java.io.*;
public class RunCommandExample {
    public static void main(String args[]) {
        String s = null;
        try
            Runtime.getRuntime().exec("password=midware1");
               //p = Runtime.getRuntime().exec("export password");
               System.exit(0);
          catch (IOException e)
            System.out.println("[IOException]. Printing Stack Trace");
            e.printStackTrace();
            System.exit(-1);
}This gives me the following error.
[IOException]. Printing Stack Trace
java.io.IOException: password=midware1: not found
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:52)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:566)
at java.lang.Runtime.exec(Runtime.java:428)
at java.lang.Runtime.exec(Runtime.java:364)
at java.lang.Runtime.exec(Runtime.java:326)
at RunCommandExample.main(RunCommandExample.java:24)
Please let me know the solution for this problem.
Waiting for your valuable replay..
Thanks in advance,
Ashly.

Answer 1

Assigning and exporting variables are not commands that you can execute from Java. You can only execute programs--binary executables. Assigning and exporting shell or environment variables is part of the shell.
Why are you trying to do this? Even if you could, it wouldn't affect the running VM, and it wouldn't affect anything outside that exec() invocation.
If you need to set them for something else you're going to run, then you should set them in a shell script and run that script.