added missing code

Author: Justin Lin

docs/CH15.md

@@ -424,12 +424,14 @@ package onlyfun.caterpillar;
 public class SomeThread implements Runnable {
     public void run() { 
         System.out.println("sleep....至 blocked 狀態"); 
-        try { 
-            Thread.sleep(9999); 
-        } 
-        catch(InterruptedException e) { 
-            System.out.println("I am interrupted...."); 
-        } 
+        while(true) {
+	        try { 
+	            Thread.sleep(9999); 
+	        } 
+	        catch(InterruptedException e) { 
+	            System.out.println("I am interrupted...."); 
+	        } 
+        }
     } 
 
     public static void main(String[] args) {