Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;
import java.util.SortedSet;
import java.util.TreeSet;

public class Main {
    static Long toNumeric(String ip) {
        Scanner sc = new Scanner(ip).useDelimiter("\\.");
        Long l = (sc.nextLong() << 24) + (sc.nextLong() << 16) + (sc.nextLong() << 8) + (sc.nextLong());

        sc.close();
        return l;
    }

    public static void main(String[] args) {
        Comparator<String> ipComparator = new Comparator<String>() {
            @Override
            public int compare(String ip1, String ip2) {
                return toNumeric(ip1).compareTo(toNumeric(ip2));
            }
        };
        SortedSet<String> ips = new TreeSet<String>(ipComparator);
        ips.addAll(Arrays.asList("192.168.0.1", "192.168.0.2", "192.168.0.9", "9.9.9.9", "127.0.0.1"));
        System.out.println(ips);
    }
}