e426. removing duplicate whitespace in a string.txt

这里面包含了一百多个JAVA源文件

// Returns a version of the input where all contiguous
    // whitespace characters are replaced with a single
    // space. Line terminators are treated like whitespace.
    public static CharSequence removeDuplicateWhitespace(CharSequence inputStr) {
        String patternStr = "\\s+";
        String replaceStr = " ";
        Pattern pattern = Pattern.compile(patternStr);
        Matcher matcher = pattern.matcher(inputStr);
        return matcher.replaceAll(replaceStr);
    }