Is it possible to write a custom redirect in java - multithreading

Question

I am testing an application.
My test is complex, and I spawn 2 thread that start 2 process builders which spawn 2 java processes.
Is it possible to write a custom redirect that will be similar to inherit but prepend something to every out and err message, so that I would know its origin.
Example code below:
public class test {
public static void main(String... args){
Thread t = new Thread(new testHelper());
t.start();
t = new Thread(new testHelper());
t.start();
}
}
import java.io.IOException;
public class testHelper implements Runnable {
#Override
public void run() {
Class klass = testWorker.class;
System.out.println(klass.getCanonicalName());
String separator = System.getProperty("file.separator");
String classpath = System.getProperty("java.class.path");
String path = System.getProperty("java.home")
+ separator + "bin" + separator + "java";
ProcessBuilder processBuilder =
new ProcessBuilder(path, "-cp",
classpath,
klass.getCanonicalName());
processBuilder.redirectError(ProcessBuilder.Redirect.INHERIT);
processBuilder.redirectOutput(ProcessBuilder.Redirect.INHERIT);
Process process = null;
try {
process = processBuilder.start();
} catch (IOException e) {
e.printStackTrace();
}
try {
process.waitFor();
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("Child Process is done");
}
}
public class testWorker {
public static void main(String ... args) throws InterruptedException {
System.out.println("Doing some stuff");
Thread.sleep(10000);
System.out.println("Finished doing some stuff");
}
}

Answer 1

No, its not possible. In the source code for java.lang.ProcessBuilder.Redirect the constructor is private and has this to say
/**
* No public constructors. Clients must use predefined
* static {#code Redirect} instances or factory methods.
*/
private Redirect() {}