Java字符串找出4个字节长度的字符

不解释，直接上代码： 
由于Iteye代码贴四个字节的ＵＴＦ－８字符出错，特能图的方式发布几个特殊字符： 

public class Byte4Check {

    public static void main(String args[]) throws UnsupportedEncodingException {
        String nickName = "12葫";

        byte[] t = nickName.substring(0, 1).getBytes("UTF-8");
        for (byte tt : t) {
            System.out.println(tt);
        }
        System.out.println("====================");
        byte[] t1 = nickName.getBytes("UTF-8");
        for (int i = 0; i < t1.length;) {
            byte tt = t1[i];
            if (CharUtils.isAscii((char) tt)) {
                byte[] ba = new byte[1];
                ba[0] = tt;
                i++;
                String result = new String(ba);
                System.out.println("1个字节的字符");
                System.out.println("字符为：" + result);
            }
            if ((tt & 0xE0) == 0xC0) {
                byte[] ba = new byte[2];
                ba[0] = tt;
                ba[1] = t1[i+1];
                i++;
                i++;
                String result = new String(ba);
                System.out.println("2个字节的字符");
                System.out.println("字符为：" + result);
            }
            if ((tt & 0xF0) == 0xE0) {
                byte[] ba = new byte[3];
                ba[0] = tt;
                ba[1] = t1[i+1];
                ba[2] = t1[i+2];
                i++;
                i++;
                i++;
                String result = new String(ba);
                System.out.println("3个字节的字符");
                System.out.println("字符为：" + result);
            }
            if ((tt & 0xF8) == 0xF0) {
                byte[] ba = new byte[4];
                ba[0] = tt;
                ba[1] = t1[i+1];
                ba[2] = t1[i+2];
                ba[3] = t1[i+3];
                i++;
                i++;
                i++;
                i++;
                String result = new String(ba);
                System.out.println("4个字节的字符");
                System.out.println("字符为：" + result);
            }
        }
    }
}

参考文献： 
http://www.yunmx.com/archives/2011/138.htm 
http://zh.wikipedia.org/wiki/UTF-8