Update java en file to fix small typo `buy` to `by`

1 files changed, 1 insertions, 1 deletions

diff --git a/java.html.markdown b/java.html.markdown
index b4757962..478ec683 100644
--- a/java.html.markdown
+++ b/java.html.markdown
@@ -338,7 +338,7 @@ public class LearnJava {
         }
         
         // But there's a nifty way to achive the same thing in an
-        // easier way, buy using something that is called Double Brace
+        // easier way, by using something that is called Double Brace
         // Initialization.
         
         private static final Set<String> COUNTRIES = HashSet<String>() {{