....

src/kr/co/swh/lecture/java/scene4/ThreadBasic2.java

 
 	public static void main(String[] args) {
 		for(int i=0; i<15; i++) {
-			Thread t = new Thread(new ThreadBasic2(i));
+			Runnable r =new ThreadBasic2(i);
+			Thread t = new Thread(r);
 			t.start();
 		}
 	}