From cf03e6173b70ad64337704402bea51600cddd1ba Mon Sep 17 00:00:00 2001
From: Niall Pemberton <niallp@apache.org>
Date: Fri, 28 Mar 2014 03:10:27 +0000
Subject: [PATCH] LANG-992 Fix NumberUtils#isNumber() returns false for "0.0",
 "0.4790", et al

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@1582585 13f79535-47bb-0310-9956-ffa450edef68
---
 .../java/org/apache/commons/lang3/math/NumberUtils.java     | 3 ++-
 .../java/org/apache/commons/lang3/math/NumberUtilsTest.java | 6 ++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/apache/commons/lang3/math/NumberUtils.java b/src/main/java/org/apache/commons/lang3/math/NumberUtils.java
index ee26f2e23..7db1f4e1e 100644
--- a/src/main/java/org/apache/commons/lang3/math/NumberUtils.java
+++ b/src/main/java/org/apache/commons/lang3/math/NumberUtils.java
@@ -1364,7 +1364,8 @@ public class NumberUtils {
                     }
                 }
                 return true;
-           } else { // leading 0, but not hex, must be octal
+           } else if (Character.isDigit(chars[start + 1])) {
+               // leading 0, but not hex, must be octal
                int i = start + 1;
                for (; i < chars.length; i++) {
                    if (chars[i] < '0' || chars[i] > '7') {
diff --git a/src/test/java/org/apache/commons/lang3/math/NumberUtilsTest.java b/src/test/java/org/apache/commons/lang3/math/NumberUtilsTest.java
index ea895e256..919020f31 100644
--- a/src/test/java/org/apache/commons/lang3/math/NumberUtilsTest.java
+++ b/src/test/java/org/apache/commons/lang3/math/NumberUtilsTest.java
@@ -1234,6 +1234,12 @@ public class NumberUtilsTest {
         compareIsNumberWithCreateNumber("00", true);
     }
 
+    @Test
+    public void testLANG992() {
+        compareIsNumberWithCreateNumber("0.0", true);
+        compareIsNumberWithCreateNumber("0.4790", true);
+    }
+
     @Test
     public void testLANG972() {
         compareIsNumberWithCreateNumber("0xABCD", true);