Class StringUtils


  • public class StringUtils
    extends java.lang.Object
    Utility methods for strings.
    • Constructor Summary

      Constructors 
      Constructor Description
      StringUtils()  
    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      private static void add​(java.util.List<java.lang.String> strs, java.lang.String str, int beginIndex, int endIndex, boolean trim, boolean excludeEmpty)  
      static boolean isEmpty​(java.lang.String string)
      Returns true if given string is null or length is zero.
      static boolean isTrimmedEmpty​(java.lang.String str)
      This is equal to str.trim().isEmpty(), but avoids temporary trimmed substring allocation.
      static java.lang.String removeLeading​(java.lang.String string, java.lang.String leading)  
      static java.lang.String removeTrailing​(java.lang.String string, java.lang.String trailing)  
      static java.util.List<java.lang.String> split​(java.lang.String str, char delim)  
      static java.util.List<java.lang.String> split​(java.lang.String str, char delim, boolean trim, boolean excludeEmpty)
      Splits a string at the specified delimiter.
      static java.lang.String substringTrimmed​(java.lang.String str, int beginIndex)
      This is equal to str.substring( beginIndex, endIndex ).trim(), but avoids temporary untrimmed substring allocation.
      static java.lang.String substringTrimmed​(java.lang.String str, int beginIndex, int endIndex)
      This is equal to str.substring( beginIndex ).trim(), but avoids temporary untrimmed substring allocation.
      private static int trimBegin​(java.lang.String str, int beginIndex, int endIndex)  
      private static int trimEnd​(java.lang.String str, int beginIndex, int endIndex)  
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • StringUtils

        public StringUtils()
    • Method Detail

      • isEmpty

        public static boolean isEmpty​(java.lang.String string)
        Returns true if given string is null or length is zero.
      • removeLeading

        public static java.lang.String removeLeading​(java.lang.String string,
                                                     java.lang.String leading)
      • removeTrailing

        public static java.lang.String removeTrailing​(java.lang.String string,
                                                      java.lang.String trailing)
      • split

        public static java.util.List<java.lang.String> split​(java.lang.String str,
                                                             char delim)
      • split

        public static java.util.List<java.lang.String> split​(java.lang.String str,
                                                             char delim,
                                                             boolean trim,
                                                             boolean excludeEmpty)
        Splits a string at the specified delimiter. If trimming is enabled, then leading and trailing whitespace characters are removed. If excludeEmpty is true, then only non-empty strings are returned.
        Since:
        2
      • add

        private static void add​(java.util.List<java.lang.String> strs,
                                java.lang.String str,
                                int beginIndex,
                                int endIndex,
                                boolean trim,
                                boolean excludeEmpty)
      • substringTrimmed

        public static java.lang.String substringTrimmed​(java.lang.String str,
                                                        int beginIndex)
        This is equal to str.substring( beginIndex, endIndex ).trim(), but avoids temporary untrimmed substring allocation. If the trimmed string is empty, a shared empty string is returned.
        Since:
        2
      • substringTrimmed

        public static java.lang.String substringTrimmed​(java.lang.String str,
                                                        int beginIndex,
                                                        int endIndex)
        This is equal to str.substring( beginIndex ).trim(), but avoids temporary untrimmed substring allocation. If the trimmed string is empty, a shared empty string is returned.
        Since:
        2
      • isTrimmedEmpty

        public static boolean isTrimmedEmpty​(java.lang.String str)
        This is equal to str.trim().isEmpty(), but avoids temporary trimmed substring allocation.
        Since:
        2
      • trimBegin

        private static int trimBegin​(java.lang.String str,
                                     int beginIndex,
                                     int endIndex)
      • trimEnd

        private static int trimEnd​(java.lang.String str,
                                   int beginIndex,
                                   int endIndex)