IPADDRESS validation

IPADDRESS validation

SOURCE : IPAddressVerification.java

import java.util.StringTokenizer;

public class IPAddressVerification {

	int count = 0;

	public static void main(String[] args) {

		String ip = "1.2.3.8";

		IPAddressVerification ipr = new IPAddressVerification();
		try {
			boolean b = ipr.validate(ip);
			System.out.println("the ip address is:  " + b);
		} catch (Exception e) {
			// TODO: handle exception
		}

	}

	private boolean validate(String ip) {

		StringTokenizer st = new StringTokenizer(ip, ".");

		int token = st.countTokens();

		System.out.println(token);
		if (token != 4) {

			return false;
		}

		while (st.hasMoreTokens()) {

			int i = Integer.parseInt(st.nextToken());

			if (i < 0 || i > 255) {

				return false;
			}

			if (i == 0) {

				count++;
			}

			if (count == 4) {

				return false;
			}

		}

		return true;
		// TODO Auto-generated method stub

	}

}

INPUT

OUTPUT

the ip address is:  true

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