IPAddress

package router;

import java.util.ArrayList;
public class IPAddress implements Comparable<IPAddress>{

    private int[] ipCim;


    public IPAddress(int[] tomb){
        ipCim = new int[4];
        for(int i = 0; i < 4; ++i){
            ipCim[i] = tomb[i];
        }
    }

    private int[] getIpCim(){
        return ipCim;
    }
    public String toString(){
        return ipCim[0] + "." + ipCim[1] + "." + ipCim[2] + "." +ipCim[3];
    }

    public static IPAddress fromString(String s) throws IPFormatException{
        int[] sv = new int[4];
        String[] darabok = s.split("\\.");
        try{
            for(int i = 0; i < 4; ++i){
                sv[i] = Integer.parseInt(darabok[i]);
            }
        }
        catch(Exception e){
            throw new IPFormatException(s);
        }
        boolean jo_e = true;
        for(int i = 0; i < 4; ++i){
            if( sv[i] < 0 || sv[i] > 255){
                jo_e = false;
            }
        }
        if(jo_e){
            return new IPAddress(sv);
        }else{
            throw new IPFormatException(s);
        }
    }

    @Override
    public boolean equals(Object o){
        if(o instanceof IPAddress){
            IPAddress ip = (IPAddress) o;
            return ugyanaz_e(this,ip);
        }else{
            return false;
        }
    }

    private boolean ugyanaz_e(IPAddress seged1, IPAddress seged2){
        int[] ip1 = seged1.getIpCim();
        int[] ip2 = seged2.getIpCim();

        double sv1 = 0;
        double sv2 = 0;
        int x = 1000000000;
        for(int i = 0; i < 4; ++i){
            if(i > 0){

                x = x/1000;
            }
            sv1 += (double)ip1[i]*x;
            sv2 += (double)ip2[i]*x;
        }
        return sv1==sv2;
    }

    @Override
    public int hashCode(){
        int sv = 0;
        for(int i = 0; i < 4; ++i){
            sv+= ipCim[i];
        }
        return sv;
    }

    @Override
    public int compareTo(IPAddress o) throws NullPointerException, ClassCastException{
        if(o == null){
            throw new NullPointerException();
        }
        if(o instanceof IPAddress){
            int[] ip1 = ipCim;
            IPAddress ip = o;
            int[] ip2 = ip.getIpCim();
            double sajat = 0;
            double param = 0;
            int x = 1000000000;
            for(int i = 0; i < 4; ++i){
                if(i > 0){

                    x = x/1000;
                }
                sajat += (double)ip1[i]*x;
                param += (double)ip2[i]*x;
            }
            if(param < sajat){
                return 1;
            }
            if(param == sajat){
                return 0;
            }
            if(param > sajat){
                return -1;
            }
        }
        throw new ClassCastException();
    }

    public boolean insideRng(IPAddress sv1, IPAddress sv2){
        if((sv1.compareTo(this) == -1 ||sv1.compareTo(this) == 0 )&&
            (sv2.compareTo(this) == 1 || sv2.compareTo(this)== 0)
            ){
            return true;
        }
        return false;
    }
}