@@ -0,0 +1,455 @@
+package calculate;%0D%0A%0D%0A%0D%0Apublic class Calculate %7B%0D%0A%0D%0A%09private double result;%0D%0A%09%0D%0A%09public void add(double first, double second)%7B%0D%0A%0D%0A%09%09this.result = first+second;%0D%0A%0D%0A%09%7D%0D%0A%0D%0A%09public void substruct(double first, double second)%7B%0D%0A%0D%0A%09%09this.result = first-second;%0D%0A%0D%0A%09%7D%0D%0A%0D%0A%09public void div(double first, double second)%7B%0D%0A%0D%0A%09%09%0D%0A%09%09this.result = first/second;%0D%0A%09%0D%0A%09%7D%0D%0A%0D%0A%0D%0A%09public void multiple(double first, double second)%7B%0D%0A%0D%0A%09%09this.result = first*second;%0D%0A%0D%0A%09%7D%0D%0A%0D%0A%7D

add second Calculate.java