diff --git a/src/main/java/org/apache/commons/lang3/time/FastDateFormat.java b/src/main/java/org/apache/commons/lang3/time/FastDateFormat.java
index 8be2e6133..51da48e13 100644
--- a/src/main/java/org/apache/commons/lang3/time/FastDateFormat.java
+++ b/src/main/java/org/apache/commons/lang3/time/FastDateFormat.java
@@ -47,7 +47,7 @@
*
*
* Only formatting is supported, but all patterns are compatible with
- * SimpleDateFormat (except time zones - see below).
+ * SimpleDateFormat (except time zones and some year patterns - see below).
*
* Java 1.4 introduced a new pattern letter, {@code 'Z'}, to represent
* time zones in RFC822 format (eg. {@code +0800} or {@code -1100}).
@@ -58,6 +58,12 @@
* This introduces a minor incompatibility with Java 1.4, but at a gain of
* useful functionality.
*
+ * Javadoc cites for the year pattern: For formatting, if the number of
+ * pattern letters is 2, the year is truncated to 2 digits; otherwise it is
+ * interpreted as a number. Starting with Java 1.7 a pattern of 'Y' or
+ * 'YYY' will be formatted as '2003', while it was '03' in former Java
+ * versions. FastDateFormat implements the behavior of Java 7.
+ *
* @since 2.0
* @version $Id$
*/
@@ -486,10 +492,10 @@ protected List parsePattern() {
rule = new TextField(Calendar.ERA, ERAs);
break;
case 'y': // year (number)
- if (tokenLen >= 4) {
- rule = selectNumberRule(Calendar.YEAR, tokenLen);
- } else {
+ if (tokenLen == 2) {
rule = TwoDigitYearField.INSTANCE;
+ } else {
+ rule = selectNumberRule(Calendar.YEAR, tokenLen < 4 ? 4 : tokenLen);
}
break;
case 'M': // month in year (text and number)
diff --git a/src/test/java/org/apache/commons/lang3/time/FastDateFormatTest.java b/src/test/java/org/apache/commons/lang3/time/FastDateFormatTest.java
index e4cde1a46..6feb57d1b 100644
--- a/src/test/java/org/apache/commons/lang3/time/FastDateFormatTest.java
+++ b/src/test/java/org/apache/commons/lang3/time/FastDateFormatTest.java
@@ -216,8 +216,9 @@ public void testFormat() {
" dddd ddd dd d DDDD DDD DD D EEEE EEE EE E aaaa aaa aa a zzzz zzz zz z";
fdf = FastDateFormat.getInstance(pattern);
sdf = new SimpleDateFormat(pattern);
- assertEquals(sdf.format(date1), fdf.format(date1));
- assertEquals(sdf.format(date2), fdf.format(date2));
+ // SDF bug fix starting with Java 7
+ assertEquals(sdf.format(date1).replaceAll("2003 03 03 03", "2003 2003 03 2003"), fdf.format(date1));
+ assertEquals(sdf.format(date2).replaceAll("2003 03 03 03", "2003 2003 03 2003"), fdf.format(date2));
} finally {
Locale.setDefault(realDefaultLocale);
TimeZone.setDefault(realDefaultZone);