DirList3.java Source code

Introduction

Here is the source code for DirList3.java

Source

// : c12:DirList3.java
// Building the anonymous inner class "in-place."
// {Args: "D.*\.java"}
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.

import java.io.File;
import java.io.FilenameFilter;
import java.util.Arrays;
import java.util.Comparator;
import java.util.regex.Pattern;

public class DirList3 {
    public static void main(final String[] args) {
        File path = new File(".");
        String[] list;
        if (args.length == 0)
            list = path.list();
        else
            list = path.list(new FilenameFilter() {
                private Pattern pattern = Pattern.compile(args[0]);

                public boolean accept(File dir, String name) {
                    return pattern.matcher(new File(name).getName()).matches();
                }
            });
        Arrays.sort(list, new AlphabeticComparator());
        for (int i = 0; i < list.length; i++)
            System.out.println(list[i]);
    }
} ///:~

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());
    }
} ///:~