public class DirList { public static void main(String[] args) { File path = new File("."); String[] list; if (args.length == 0) list = path.list(); else list = path.list(new DirFilter(args[0])); Arrays.sort(list, new AlphabeticComparator()); for (int i = 0; i < list.length; i++) System.out.println(list[i]); } }
class DirFilter implements FilenameFilter { private Pattern pattern;
public DirFilter(String regex) { pattern = Pattern.compile(regex); }
public boolean accept(File dir, String name) { // Strip path information, search for regex: return pattern.matcher(new File(name).getName()).matches(); } } ///:~
class AlphabeticComparator implements Comparator { public int compare(Object o1, Object o2) { String s1 = (String) o1; String s2 = (String) o2; return s1.toLowerCase().compareTo(s2.toLowerCase()); } } ///:~
