@@ -0,0 +1,139 @@
+package ru.job4j;%0A%0Apublic class Calculate %7B%0A    %0Apublic static void main(String%5B%5D args) %7B%0A    %0ASystem.out.println(%22Hello World!%22);%0A    %0A%7D%0A%7D

add calculate.java