@@ -0,0 +1,144 @@
+package aoleynikov;%0A%0Apublic class Calculate %7B%0A    public static void main (String%5B%5D args)%7B%0A        System.out.println(%22Hello world%22);%0A    %7D%0A%7D%0A%0A%0A

add programm HelloWorld