Using Runtime class

Question

Hi,
i would like to run a an external java program from within another java program,
here is the structure of my called parogram
c:/temp/jetty
/lib/*.jar
start.jar
my caller program have to invoke the start.jar, but this jar uses the lib folder
so my code construct a java command with the -cp options giving all the jar, and finally use th runtime class to call start.jar
here is the code :
String command = "java -cp D:/temp/jetty/lib/jetty-6.1.0.jar;D:/temp/jetty/lib/etc/another.jar -jar D:/temp/jetty/lib/jetty-6.1.0/start.jar"
Runtime runtime = Runtime.getRuntime();     
runtime.exec(command);
it doesnt work, (classnot found error!!!) evenif i include in the cp option all the jar,
my question is how to force the runtime to start the execution at c:/temp/jetty ??
can anyone help

Answer 1

Try this for ideas
package testing;
import java.io.IOException;
public class Test
  public static void main(String[] args) throws IOException
    Runtime.getRuntime().exec("java -jar AnotherJar.jar");
}and
package testing;
import javax.swing.JOptionPane;
public class Another
  public static void main(String[] args)
     JOptionPane.showMessageDialog(null, "Another .jar running", "Blaa blaa", JOptionPane.INFORMATION_MESSAGE);
}Then compile both, create manifests for both, create the jars (name the .jar corresponding to class Another as AnotherJar.jar), put the jars in the same directory and run the .jar that corrsponds to class Test.
edit
And obviously, in your case, you need to add the line
Class-Path: lib/*.jar
to the manifest of the program that needs the jar in directory lib.
Message was edited by:
duckbill