Consequences of using Run () without start () in multiple threads

Java multithreaded design mode P37 page exercises

The current thread can be printed in the run of Printthread to determine

Using Run () is actually the main thread, and no new threads are generated.

public class Main {
public static void Main (string[] args) {
New Printthread ("good!"). Run ();

New Printthread ("nice!"). Run ();

}
}

public class Printthread extends Thread {
Private String message;
Public Printthread (String message) {
this.message = message;
}
public void Run () {
for (int i = 0; i <; i++) {
System.out.print (message);
System.out.print (Thread.CurrentThread (). GetName ());//Add print current thread, found to be main

}
}
}