/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import javax.swing.SwingUtilities;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
        ThreadGroup tg=new ThreadGroup("foo");
        new Thread(tg, ()->
            SwingUtilities.invokeLater(() -> System.out.println(Thread.currentThread()))
        ).start();
	}
}

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