package test;

public class TestYYS {

	private static String CMCC = "CMCC";		//移动
	private static String UNICOM = "UNICOM";	//联通
	private static String TELECOM = "TELECOM";	//电信
	private static String UNKNWON = "UNKNWON";	//未知

	private static boolean isNumeric(String msg) {
		for (int i = 0; i < msg.length(); i++) {
			if (java.lang.Character.isDigit(msg.charAt(i))) {
				continue;
			}
			return false;
		}
		return true;
	}

	public static String getOperater(String phoneNum) {
		String head3 = "";
		String head4 = "";
		phoneNum = phoneNum.trim();

		if (phoneNum == null || phoneNum.length() < 11) {
			return UNKNWON;
		} else {
			if (phoneNum.startsWith("+")) {
				phoneNum = phoneNum.substring(1);
			}
			if (phoneNum.startsWith("86")) {
				phoneNum = phoneNum.substring(2);
			}
		}

		if (phoneNum.length() != 11) {
			return UNKNWON;
		}

		if (!isNumeric(phoneNum)) {
			return UNKNWON;
		}

		head3 = phoneNum.substring(0, 3);
		head4 = phoneNum.substring(0, 4);

		if (head3.equals("135") || head3.equals("136") || head3.equals("137")
				|| head3.equals("138") || head3.equals("139")
				|| head3.equals("150") || head3.equals("151")
				|| head3.equals("152") || head3.equals("157")
				|| head3.equals("158") || head3.equals("159")
				|| head3.equals("182") || head3.equals("187")
				|| head3.equals("188") || head3.equals("147")) {
			return CMCC;
		}
		if (head4.equals("1340") || head4.equals("1341")
				|| head4.equals("1342") || head4.equals("1343")
				|| head4.equals("1344") || head4.equals("1345")
				|| head4.equals("1346") || head4.equals("1347")
				|| head4.equals("1348")) {
			return CMCC;
		}
		if (head3.equals("130") || head3.equals("131") || head3.equals("132")
				|| head3.equals("145") || head3.equals("155")
				|| head3.equals("156") || head3.equals("185")
				|| head3.equals("186")) {
			return UNICOM;
		}
		if (head3.equals("133") || head3.equals("153") || head3.equals("180")
				|| head3.equals("189")) {
			return TELECOM;
		}
		if (head4.equals("1349")) {
			return TELECOM;
		}

		return UNKNWON;
	}
	public static void main(String[] args) {
		System.out.println(TestYYS.getOperater("18551634030"));
	}
}