Code review adjusts in Day007Test

days/day007/src/main/java/com/thegreatapi/ahundreddaysofjava/day007/Day007.java

@@ -0,0 +1,16 @@
+package com.thegreatapi.ahundreddaysofjava.day007;
+
+import java.text.MessageFormat;
+
+public class Day007 {
+
+    public static void main(String[] args) {
+        showMessage("Java", "is", "great");
+    }
+
+    public static void showMessage(String param1, String param2, String param3) {
+        String message = MessageFormat.format("This message contains 3 parameters. The #1 is ''{0}'', the #2 is ''{1}'', and the #3 is ''{2}''.",
+                param1, param2, param3);
+        System.out.println(message);
+    }
+}