Class StringUtils


  • public class StringUtils
    extends Object
    Supplement of commons-lang, the stringSubstitution() was in a simpler implementation available in an older commons-lang implementation. This class is not part of the public API and could change without warning.
    Version:
    $Id: StringUtils.java 1636204 2014-11-02 22:30:31Z ggregory $
    • Constructor Detail

      • StringUtils

        public StringUtils()
    • Method Detail

      • stringSubstitution

        public static StringBuffer stringSubstitution​(String argStr,
                                                      Map<? super String,​?> vars,
                                                      boolean isLenient)
        Perform a series of substitutions.

        The substitutions are performed by replacing ${variable} in the target string with the value of provided by the key "variable" in the provided hash table.

        A key consists of the following characters:

        • letter
        • digit
        • dot character
        • hyphen character
        • plus character
        • underscore character
        Parameters:
        argStr - the argument string to be processed
        vars - name/value pairs used for substitution
        isLenient - ignore a key not found in vars or throw a RuntimeException?
        Returns:
        String target string with replacements.
      • split

        public static String[] split​(String input,
                                     String splitChar)
        Split a string into an array of strings based on a separator.
        Parameters:
        input - what to split
        splitChar - what to split on
        Returns:
        the array of strings
      • fixFileSeparatorChar

        public static String fixFileSeparatorChar​(String arg)
        Fixes the file separator char for the target platform using the following replacement.
        • '/' → File.separatorChar
        • '\\' → File.separatorChar
        Parameters:
        arg - the argument to fix
        Returns:
        the transformed argument
      • toString

        public static String toString​(String[] strings,
                                      String separator)
        Concatenates an array of string using a separator.
        Parameters:
        strings - the strings to concatenate
        separator - the separator between two strings
        Returns:
        the concatenated strings
      • quoteArgument

        public static String quoteArgument​(String argument)
        Put quotes around the given String if necessary.

        If the argument doesn't include spaces or quotes, return it as is. If it contains double quotes, use single quotes - else surround the argument by double quotes.

        Parameters:
        argument - the argument to be quoted
        Returns:
        the quoted argument
        Throws:
        IllegalArgumentException - If argument contains both types of quotes
      • isQuoted

        public static boolean isQuoted​(String argument)
        Determines if this is a quoted argument - either single or double quoted.
        Parameters:
        argument - the argument to check
        Returns:
        true when the argument is quoted