--- a/src/main/java/alice/test/topology/fish/WidthReceiver.java	Tue May 20 15:00:21 2014 +0900
+++ b/src/main/java/alice/test/topology/fish/WidthReceiver.java	Mon Jun 02 16:37:57 2014 +0900
@@ -2,6 +2,10 @@
 
 import java.util.Collections;
 import java.util.Comparator;
+import java.util.function.Function;
+import java.util.function.ToDoubleFunction;
+import java.util.function.ToIntFunction;
+import java.util.function.ToLongFunction;
 
 import alice.codesegment.CodeSegment;
 import alice.datasegment.CommandType;
@@ -35,6 +39,48 @@
 				public int compare(Routing o1, Routing o2) {
 					return o1.id - o2.id;
 				}
+
+				@Override
+				public Comparator<Routing> reversed() {
+					return null;
+				}
+
+				@Override
+				public Comparator<Routing> thenComparing(
+						Comparator<? super Routing> other) {
+					return null;
+				}
+
+				@Override
+				public <U> Comparator<Routing> thenComparing(
+						Function<? super Routing, ? extends U> keyExtractor,
+						Comparator<? super U> keyComparator) {
+					return null;
+				}
+
+				@Override
+				public <U extends Comparable<? super U>> Comparator<Routing> thenComparing(
+						Function<? super Routing, ? extends U> keyExtractor) {
+					return null;
+				}
+
+				@Override
+				public Comparator<Routing> thenComparingInt(
+						ToIntFunction<? super Routing> keyExtractor) {
+					return null;
+				}
+
+				@Override
+				public Comparator<Routing> thenComparingLong(
+						ToLongFunction<? super Routing> keyExtractor) {
+					return null;
+				}
+
+				@Override
+				public Comparator<Routing> thenComparingDouble(
+						ToDoubleFunction<? super Routing> keyExtractor) {
+					return null;
+				}
 			});
 			routing.sumWidth += width;
 		}