Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

public class Main {
    private static boolean validIP(String ip) {
        if (ip == null || ip.length() < 7 || ip.length() > 15)
            return false;
        if (ip.contains("-"))
            return false;

        try {
            int x = 0;
            int y = ip.indexOf('.');

            if (y != -1 && Integer.parseInt(ip.substring(x, y)) > 255)
                return false;

            x = ip.indexOf('.', ++y);
            if (x != -1 && Integer.parseInt(ip.substring(y, x)) > 255)
                return false;

            y = ip.indexOf('.', ++x);
            return !(y != -1 && Integer.parseInt(ip.substring(x, y)) > 255
                    && Integer.parseInt(ip.substring(++y, ip.length() - 1)) > 255
                    && ip.charAt(ip.length() - 1) != '.');

        } catch (NumberFormatException e) {
            return false;
        }
    }
}