remove unused method: StringUtils.split()

core/src/main/java/com/taobao/arthas/core/util/StringUtils.java

@@ -893,78 +893,4 @@ public abstract class StringUtils {
                 : String.format("%.1f EiB", (bytes >> 20) / 0x1p40);
     }
 
-    /**
-     * <p>Splits the provided text into an array, separator specified.
-     * This is an alternative to using StringTokenizer.</p>
-     *
-     * <p>The separator is not included in the returned String array.
-     * Adjacent separators are treated as one separator.
-     * For more control over the split use the StrTokenizer class.</p>
-     *
-     * <p>A {@code null} input String returns {@code null}.</p>
-     *
-     * <pre>
-     * StringUtils.split(null, *)         = null
-     * StringUtils.split("", *)           = []
-     * StringUtils.split("a.b.c", '.')    = ["a", "b", "c"]
-     * StringUtils.split("a..b.c", '.')   = ["a", "b", "c"]
-     * StringUtils.split("a:b:c", '.')    = ["a:b:c"]
-     * StringUtils.split("a b c", ' ')    = ["a", "b", "c"]
-     * </pre>
-     *
-     * @param str  the String to parse, may be null
-     * @param separatorChar  the character used as the delimiter
-     * @return an array of parsed Strings, {@code null} if null String input
-     * @since 2.0
-     */
-    public static String[] split(final String str, final char separatorChar) {
-        return splitWorker(str, separatorChar, false);
-    }
-
-    /**
-     * Performs the logic for the {@code split} and
-     * {@code splitPreserveAllTokens} methods that do not return a
-     * maximum array length.
-     *
-     * @param str  the String to parse, may be {@code null}
-     * @param separatorChar the separate character
-     * @param preserveAllTokens if {@code true}, adjacent separators are
-     * treated as empty token separators; if {@code false}, adjacent
-     * separators are treated as one separator.
-     * @return an array of parsed Strings, {@code null} if null String input
-     */
-    private static String[] splitWorker(final String str, final char separatorChar, final boolean preserveAllTokens) {
-        // Performance tuned for 2.0 (JDK1.4)
-
-        if (str == null) {
-            return null;
-        }
-        final int len = str.length();
-        if (len == 0) {
-            return EMPTY_STRING_ARRAY;
-        }
-        final List<String> list = new ArrayList<String>();
-        int i = 0, start = 0;
-        boolean match = false;
-        boolean lastMatch = false;
-        while (i < len) {
-            if (str.charAt(i) == separatorChar) {
-                if (match || preserveAllTokens) {
-                    list.add(str.substring(start, i));
-                    match = false;
-                    lastMatch = true;
-                }
-                start = ++i;
-                continue;
-            }
-            lastMatch = false;
-            match = true;
-            i++;
-        }
-        if (match || preserveAllTokens && lastMatch) {
-            list.add(str.substring(start, i));
-        }
-        return list.toArray(new String[list.size()]);
-    }
-
 }