1    package utils; 
2     
3    public class ByteUtil { 
4        public static void printToDecimal(byte b) { 
5            System.out.println(toInt(b)); 
6        } 
7     
8        public static int toInt(byte b) { 
9            return 
10                   ((b >> 4) & 0xF) * 16 + 
11                   (b & 0xF); 
12       } 
13    
14       public static String toString(byte b, int radix) { 
15           return 
16                   Integer.toString(toInt(b), radix); 
17       } 
18    
19       public static String toString(byte b) { 
20           return toString(b, 10); 
21       } 
22    
23       public static void printToHex(byte b) { 
24           System.out.print("0x" + getHex(b)); 
25       } 
26    
27       public static void main(String[] args) { 
28           testGetHex(); 
29       } 
30    
31       public static void testGetHex() { 
32           byte b[] = { 
33               0, 1, 16, 127 
34           }; 
35           System.out.println(getHex(b)); 
36       } 
37       /** 
38        * Encode a byte array into a hexidecimal String 
39        * @param b 
40        * @return 
41        */ 
42       public static String getHex(byte b[]) { 
43           char hex[] = { 
44               '0', '1', '2', '3', '4', 
45               '5', '6', '7', '8', '9', 
46               'A', 'B', 'C', 'D', 'E', 'F'}; 
47           StringBuffer sb = new StringBuffer(); 
48           for (int i = 0; i < b.length; i++) 
49               sb.append(hex[(b[i] >> 4) & 0x0f]  + "" + hex[b[i] & 0x0f]); 
50           return sb.toString(); 
51       } 
52    
53       public static String getHex(byte b) { 
54           char hex[] = { 
55               '0', '1', '2', '3', '4', 
56               '5', '6', '7', '8', '9', 
57               'A', 'B', 'C', 'D', 'E', 'F'}; 
58           return hex[(b >> 4) & 0x0f]  + "" + hex[b & 0x0f]; 
59       } 
60    
61       public static void printToOctal(byte b) { 
62           char oct[] = { 
63               '0', '1', '2', '3', '4', 
64               '5', '6', '7'}; 
65           System.out.print("0" + 
66                   oct[(b >> 6) & 03] + 
67                   oct[(b >> 3) & 07] + 
68                   oct[b & 07] + " "); 
69       } 
70    
71    
72   } 
73