add more demo for creating new thred

src/createthread/CreateByTimer.java

@@ -0,0 +1,18 @@
+package createthread;
+
+import java.util.Timer;
+import java.util.TimerTask;
+
+public class CreateByTimer {
+
+    public static void main(String[] args) {
+        Timer timer = new Timer();
+
+        timer.schedule(new TimerTask() {
+            @Override
+            public void run() {
+                System.out.println("create thread by using timer");
+            }
+        }, 0, 1000);
+    }
+}