FooRunnable.java

package example2;

public class FooRunnable implements Runnable {
	public void run() {
		for (int x = 1; x < 6; x++) {
			System.out.println("Runnable running");
		}
	}
}

NameRunnable.java

package example3;

class NameRunnable implements Runnable {
	public void run() {
		System.out.println("NameRunnable running");
		
		//Invoked the static Thread.currentThread() method, which returns a reference to the currently executing thread, and 
		//then we invoked getName() on that returned reference
		System.out.println("Run by " + Thread.currentThread().getName());
	}
}

NameThread.java

package example3;

public class NameThread {
	public static void main(String[] args) {
		NameRunnable nr = new NameRunnable();
		Thread t = new Thread(nr);
		
		//Even if you don't explicitly name a thread, it still has a name.
		//Run this class be commenting below setName call
		t.setName("Fred");
		t.start();
	}
}

TestThreads.java

package example2;

public class TestThreads {
	public static void main(String[] args) {
		FooRunnable r = new FooRunnable();
		Thread t = new Thread(r);
		t.start();
	}
}