7177315: SimpleDateFormat parses wrong 2-digit year if input contains spaces

Reviewed-by: peytoia

jdk/src/share/classes/java/text/SimpleDateFormat.java

@@ -1845,6 +1845,8 @@ public class SimpleDateFormat extends DateFormat {
             }
             ++pos.index;
         }
+        // Remember the actual start index
+        int actualStart = pos.index;
 
       parsing:
         {
@@ -1924,9 +1926,9 @@ public class SimpleDateFormat extends DateFormat {
                 // we made adjustments to place the 2-digit year in the proper
                 // century, for parsed strings from "00" to "99".  Any other string
                 // is treated literally:  "2250", "-1", "1", "002".
-                if (count <= 2 && (pos.index - start) == 2
+                if (count <= 2 && (pos.index - actualStart) == 2
-                    && Character.isDigit(text.charAt(start))
+                    && Character.isDigit(text.charAt(actualStart))
-                    && Character.isDigit(text.charAt(start+1))) {
+                    && Character.isDigit(text.charAt(actualStart + 1))) {
                     // Assume for example that the defaultCenturyStart is 6/18/1903.
                     // This means that two-digit years will be forced into the range
                     // 6/18/1903 to 6/17/2003.  As a result, years 00, 01, and 02

jdk/test/java/text/Format/DateFormat/Bug7177315.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * @test
+ * @bug 7177315
+ * @summary Make sure that space characters are properly skipped when
+ *          parsing 2-digit year values.
+ */
+
+import java.text.*;
+import java.util.*;
+
+public class Bug7177315 {
+    private static final String EXPECTED = "01/01/2012";
+    private static final String[] DATA = {
+        "01/01/12",
+        "01/01/ 12",
+        "01/01/       12",
+        "1/1/12",
+        "1/1/  12"
+    };
+
+    public static void main (String[] args) throws ParseException {
+        SimpleDateFormat parseFormat = new SimpleDateFormat("MM/dd/yy", Locale.US);
+        Calendar cal = new GregorianCalendar(2012-80, Calendar.JANUARY, 1);
+        parseFormat.set2DigitYearStart(cal.getTime());
+        SimpleDateFormat fmtFormat = new SimpleDateFormat("MM/dd/yyyy", Locale.US);
+
+        for (String text : DATA) {
+            Date date = parseFormat.parse(text);
+            String got = fmtFormat.format(date);
+            if (!EXPECTED.equals(got)) {
+                throw new RuntimeException("got: " + got + ", expected: " + EXPECTED);
+            }
+        }
+    }
+}