From da0bbbb9a6de9fe587d091debca65e53adf4d384 Mon Sep 17 00:00:00 2001
From: Gilles Sadowski <erans@apache.org>
Date: Wed, 16 Oct 2013 08:08:07 +0000
Subject: [PATCH] MATH-1041 Added "toString" method. Thanks to Sean Owen.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1532679 13f79535-47bb-0310-9956-ffa450edef68
---
 src/main/java/org/apache/commons/math3/util/Pair.java     | 5 +++++
 src/test/java/org/apache/commons/math3/util/PairTest.java | 6 ++++++
 2 files changed, 11 insertions(+)

diff --git a/src/main/java/org/apache/commons/math3/util/Pair.java b/src/main/java/org/apache/commons/math3/util/Pair.java
index 1e233e661..f174b2f34 100644
--- a/src/main/java/org/apache/commons/math3/util/Pair.java
+++ b/src/main/java/org/apache/commons/math3/util/Pair.java
@@ -133,4 +133,9 @@ public class Pair<K, V> {
 
         return result;
     }
+
+    @Override
+    public String toString() {
+        return "[" + getKey() + ", " + getValue() + "]";
+    }
 }
diff --git a/src/test/java/org/apache/commons/math3/util/PairTest.java b/src/test/java/org/apache/commons/math3/util/PairTest.java
index 1f3a8fed7..e349fd767 100644
--- a/src/test/java/org/apache/commons/math3/util/PairTest.java
+++ b/src/test/java/org/apache/commons/math3/util/PairTest.java
@@ -73,6 +73,12 @@ public class PairTest {
         Assert.assertFalse(p1.hashCode() == p2.hashCode());
     }
 
+    @Test
+    public void testToString() {
+        Assert.assertEquals("[null, null]", new Pair<Object, Object>(null, null).toString());
+        Assert.assertEquals("[foo, 3]", new Pair<String, Integer>("foo", 3).toString());
+    }
+
     /**
      * A mutable integer.
      */