From 3cc0c542052d4c8baba032f5ceeb051a96cf06f9 Mon Sep 17 00:00:00 2001
From: myui <yuin405@gmail.com>
Date: Wed, 7 Sep 2016 00:52:52 +0900
Subject: [PATCH] Fixed compilation erros in Java 7

---
 .../java/hivemall/utils/collections/DoubleRingBuffer.java  | 5 +++++
 .../main/java/hivemall/utils/collections/RingBuffer.java   | 7 ++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/core/src/main/java/hivemall/utils/collections/DoubleRingBuffer.java b/core/src/main/java/hivemall/utils/collections/DoubleRingBuffer.java
index f76a4504..fa3ddcda 100644
--- a/core/src/main/java/hivemall/utils/collections/DoubleRingBuffer.java
+++ b/core/src/main/java/hivemall/utils/collections/DoubleRingBuffer.java
@@ -139,6 +139,11 @@ public Double next() {
             return d;
         }
 
+        @Override
+        public void remove() {
+            throw new UnsupportedOperationException();
+        }
+
     }
 
 }
diff --git a/core/src/main/java/hivemall/utils/collections/RingBuffer.java b/core/src/main/java/hivemall/utils/collections/RingBuffer.java
index 3f28b16a..cab50e49 100644
--- a/core/src/main/java/hivemall/utils/collections/RingBuffer.java
+++ b/core/src/main/java/hivemall/utils/collections/RingBuffer.java
@@ -71,7 +71,7 @@ public RingBuffer<T> add(final T x) {
         }
         return this;
     }
-    
+
     @Nullable
     public T head() {
         return ring[head];
@@ -146,6 +146,11 @@ public T next() {
             return d;
         }
 
+        @Override
+        public void remove() {
+            throw new UnsupportedOperationException();
+        }
+
     }
 
 }