Repository: commons-lang Updated Branches: refs/heads/master c8e648b92 -> 610caab59
LANG-1307: Added getDigits method to StringUtils (closes #225) Project: http://git-wip-us.apache.org/repos/asf/commons-lang/repo Commit: http://git-wip-us.apache.org/repos/asf/commons-lang/commit/9b3257e4 Tree: http://git-wip-us.apache.org/repos/asf/commons-lang/tree/9b3257e4 Diff: http://git-wip-us.apache.org/repos/asf/commons-lang/diff/9b3257e4 Branch: refs/heads/master Commit: 9b3257e4d1a63e0a4d971a331eaf7b9a08d98040 Parents: c8e648b Author: Arshad Basha <arba...@paypal.com> Authored: Tue Jan 3 00:14:33 2017 +0530 Committer: pascalschumacher <pascalschumac...@gmx.net> Committed: Mon May 1 11:05:45 2017 +0200 ---------------------------------------------------------------------- .../org/apache/commons/lang3/StringUtils.java | 36 ++++++++++++++++++++ .../apache/commons/lang3/StringUtilsTest.java | 11 ++++++ 2 files changed, 47 insertions(+) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/commons-lang/blob/9b3257e4/src/main/java/org/apache/commons/lang3/StringUtils.java ---------------------------------------------------------------------- diff --git a/src/main/java/org/apache/commons/lang3/StringUtils.java b/src/main/java/org/apache/commons/lang3/StringUtils.java index bd660bc..6ab1118 100644 --- a/src/main/java/org/apache/commons/lang3/StringUtils.java +++ b/src/main/java/org/apache/commons/lang3/StringUtils.java @@ -7157,6 +7157,42 @@ public class StringUtils { } /** + * <p>Checks if a String {@code str} contains Unicode digits, + * if yes then concatenate all the digits in {@code str} and return it as a String.</p> + * + * <p>An empty ("") String will be returned if no digits found in {@code str}.</p> + * + * <pre> + * StringUtils.getDigits(null) = null + * StringUtils.getDigits("") = "" + * StringUtils.getDigits("abc") = "" + * StringUtils.getDigits("1000$") = "1000" + * StringUtils.getDigits("1123~45") = "12345" + * StringUtils.getDigits("(541) 754-3010") = "5417543010" + * StringUtils.getDigits("\u0967\u0968\u0969") = "\u0967\u0968\u0969" + * </pre> + * + * @param str the String to extract digits from, may be null + * @return String with only digits, + * or an empty ("") String if no digits found, + * or {@code null} String if {@code str} is null + */ + public static String getDigits(final String str) { + if (isEmpty(str)) { + return str; + } + final int sz = str.length(); + final StringBuilder strDigits = new StringBuilder(sz); + for (int i = 0; i < sz; i++) { + final char tempChar = str.charAt(i); + if (Character.isDigit(tempChar)) { + strDigits.append(tempChar); + } + } + return strDigits.toString(); + } + + /** * <p>Checks if the CharSequence contains only whitespace.</p> * * <p>Whitespace is defined by {@link Character#isWhitespace(char)}.</p> http://git-wip-us.apache.org/repos/asf/commons-lang/blob/9b3257e4/src/test/java/org/apache/commons/lang3/StringUtilsTest.java ---------------------------------------------------------------------- diff --git a/src/test/java/org/apache/commons/lang3/StringUtilsTest.java b/src/test/java/org/apache/commons/lang3/StringUtilsTest.java index b776b3b..3051b47 100644 --- a/src/test/java/org/apache/commons/lang3/StringUtilsTest.java +++ b/src/test/java/org/apache/commons/lang3/StringUtilsTest.java @@ -3206,4 +3206,15 @@ public class StringUtilsTest { assertNull(StringUtils.toCodePoints(null)); assertArrayEquals(ArrayUtils.EMPTY_INT_ARRAY, StringUtils.toCodePoints("")); } + + @Test + public void testGetDigits() { + assertEquals(null, StringUtils.getDigits(null)); + assertEquals("", StringUtils.getDigits("")); + assertEquals("", StringUtils.getDigits("abc")); + assertEquals("1000", StringUtils.getDigits("1000$")); + assertEquals("12345", StringUtils.getDigits("123password45")); + assertEquals("5417543010", StringUtils.getDigits("(541) 754-3010")); + assertEquals("\u0967\u0968\u0969", StringUtils.getDigits("\u0967\u0968\u0969")); + } }
