Destroy java subprocess

Question

Hi, all.
I have a Java program that runtime exec's several other Java
programs. I'm looking for a
way to destroy the java process. I try to call destroy method but it doesn't work, the process continue executing.
public String start() {
rt = Runtime.getRuntime();
try {
processo = rt.exec("cmd /K start java StartELAB");
catch (Exception ex) {
ex.printStackTrace();
return "";
public String stop {
if(processo != null) {
try {
processoElab.destroy();
catch (Exception ex) {
ex.printStackTrace();
//StartELAB doesn't stop.
PS
I'm using Windows 2000.
If I start a no java subprocess I can stop it.
i.e.:
Process p = rt.exec("notepad.exe");
p.destroy(); //OK.
Help me!!!!!
Piddu

Answer 1

hi,
When you start a java sub process using the following code,
processo = rt.exec("cmd /K start java StartELAB");
the exec method returns you the process instance that contains the details about the process. You should preserve this instance & operate on this to destroy.
For example, in the code below the processes are destroyed. Java Runtime does not differentiate whether its a java/non java process. If you call the destroy() method on a Process's instance it will destroy it.
public class MyRuntime
public static void main(String args[])
Runtime rt= Runtime.getRuntime();
Process notepad=null;
Process java=null;
try
notepad = rt.exec("notepad.exe");
Thread.sleep(500);
notepad.destroy();
java = rt.exec("cmd /K start java StartELAB");
Thread.sleep(500);
java.destroy();
catch (Exception ex)
ex.printStackTrace();