Subversion Repositories programming

Rev

Rev 222 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
224 ira 1 
/*******************************************************************************
2 
 * File: IPAddr.java
3 
 * Author: Ira W. Snyder (devel@irasnyder.com)
4 
 * License: GNU General Public License v2
5 
 * Class: CS380 - Computer Networking
6 
 *
7 
 * Assignment: Project #3
8 
 * Date Last Modified: 2006-02-15
9 
 *
10 
 * Purpose: //FIXME
11 
 ******************************************************************************/
221 ira 12 
 
13 
public class IPAddr
14 
{
224 ira 15 
    /* Instance Variables */
221 ira 16 
    private int[] fields = new int[4];
17 
 
224 ira 18 
    /**
19 
     * Method: IPAddr constructor
20 
     * Purpose: Construct an IPAddr object
21 
     */
221 ira 22 
    public IPAddr (String ip)
23 
    {
222 ira 24 
        int i;
221 ira 25 
        String[] sp = ip.split("\\.");
222 ira 26 
 
224 ira 27 
        // We must have a bad argument
28 
        if (sp.length < 4)
29 
            throw new IllegalArgumentException();
30 
 
31 
        // Set the private variable array to the argument
222 ira 32 
        for (i=0; i<sp.length; i++)
221 ira 33 
            fields[i] = Integer.parseInt(sp[i]);
34 
    }
35 
 
224 ira 36 
    /**
37 
     * Method: getField
38 
     * Purpose: Get one of the fields of an IP Address
39 
     */
221 ira 40 
    public int getField (int fieldNum)
41 
    {
224 ira 42 
        if (fieldNum < 0 || fieldNum > 3)
43 
            throw new IllegalArgumentException();
44 
 
221 ira 45 
        return fields[fieldNum];
46 
    }
47 
 
224 ira 48 
    /**
49 
     * Method: toString
50 
     * Purpose: Convert this IPAddr object to a String
51 
     */
221 ira 52 
    public String toString ()
53 
    {
222 ira 54 
        String s = new String("" + fields[0] + '.' + fields[1] + '.'
55 
                            + fields[2] + '.' + fields[3]);
221 ira 56 
        return s;
57 
    }
58 
}
59