Is there any way to transfer system properties to sub-processes?

Question

I'm writing a program that forms a new sub-process in a following pattern:

proc = java.lang.Runtime.getRuntime().exec("java -jar Xxx.jar");

Though the environment variables are automatically inherited to sub-processes, I think the system properties defined by -D<name of property>=<value of the property> are not.

My question is, if there is any way to transfer the system properties programmatically. Any comments or answers are welcomed. Thanks.

Answer 1

One solution that I've come up with is to define a set of properties to pass to subprocesses, and create a -D<key>=<value> strings from it.

static String[] properties_to_pass = {
    "log4j.configuration"
};

Above is the set of system properties to pass. Then...

StringBuffer properties = new StringBuffer();
for ( String property : properties_to_pass ) {
    String value = System.getProperty(property);
    if ( value != null ) {
        String r = String.format("-D%s=%s ", property, value);
        properties.append( r );
    }
}

And after the above ...

String command_arg = properties.toString();
String command = String.format("java %s -jar Torpedo.jar", command_arg);
java.lang.Runtime.getRuntime.exec( command );

Very naive solution, but works anyway. But still not sure that there might be a better solution. Any further comments are welcomed.