1 6 package fr.jayasoft.ivy.util; 7 8 import java.util.Arrays ; 9 import java.util.HashSet ; 10 import java.util.List ; 11 12 20 public class StringUtils { 21 public static String uncapitalize(String string) { 22 if (string == null || string.length() == 0) { 23 return string; 24 } 25 if (string.length() == 1) { 26 return string.toLowerCase(); 27 } 28 return string.substring(0,1).toLowerCase() + string.substring(1); 29 } 30 31 39 public static String join(Object [] objs, String sep) { 40 StringBuffer buf = new StringBuffer (); 41 for (int i = 0; i < objs.length; i++) { 42 buf.append(objs[i]).append(sep); 43 } 44 if (objs.length > 0) { 45 buf.setLength(buf.length() - sep.length()); } 47 return buf.toString(); 48 } 49 50 51 53 private final static char[] SHIFTS = { 54 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 55 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 56 114, 120, 53, 79, 96, 109, 72, 108, 70, 64, 76, 67, 116, 74, 68, 87, 57 111, 52, 75, 119, 49, 34, 82, 81, 95, 65, 112, 86, 118, 110, 122, 105, 58 41, 57, 83, 43, 46, 102, 40, 89, 38, 103, 45, 50, 42, 123, 91, 35, 59 125, 55, 54, 66, 124, 126, 59, 47, 92, 71, 115, 78, 88, 107, 106, 56, 60 36, 121, 117, 104, 101, 100, 69, 73, 99, 63, 94, 93, 39, 37, 61, 48, 61 58, 113, 32, 90, 44, 98, 60, 51, 33, 97, 62, 77, 84, 80, 85, 223, 62 225, 216, 187, 166, 229, 189, 222, 188, 141, 249, 148, 200, 184, 136, 248, 190, 63 199, 170, 181, 204, 138, 232, 218, 183, 255, 234, 220, 247, 213, 203, 226, 193, 64 174, 172, 228, 252, 217, 201, 131, 230, 197, 211, 145, 238, 161, 179, 160, 212, 65 207, 221, 254, 173, 202, 146, 224, 151, 140, 196, 205, 130, 135, 133, 143, 246, 66 192, 159, 244, 239, 185, 168, 215, 144, 139, 165, 180, 157, 147, 186, 214, 176, 67 227, 231, 219, 169, 175, 156, 206, 198, 129, 164, 150, 210, 154, 177, 134, 127, 68 182, 128, 158, 208, 162, 132, 167, 209, 149, 241, 153, 251, 237, 236, 171, 195, 69 243, 233, 253, 240, 194, 250, 191, 155, 142, 137, 245, 235, 163, 242, 178, 152 70 }; 71 82 public final static String encrypt(String str) { 83 if (str == null) { 84 return null; 85 } 86 StringBuffer buf = new StringBuffer (); 87 for (int i = 0; i < str.length(); i++) { 88 char c = str.charAt(i); 89 if (c >= SHIFTS.length) { 90 throw new IllegalArgumentException ("encrypt method can only be used with simple characters. '"+c+"' not allowed"); 91 } 92 buf.append(SHIFTS[c]); 93 } 94 return buf.toString(); 95 } 96 97 102 public final static String decrypt(String str) { 103 if (str == null) { 104 return null; 105 } 106 StringBuffer buf = new StringBuffer (); 107 for (int i = 0; i < str.length(); i++) { 108 buf.append(decrypt(str.charAt(i))); 109 } 110 return buf.toString(); 111 } 112 113 private static char decrypt(char c) { 114 for (char i = 0; i < SHIFTS.length; i++) { 115 if (SHIFTS[i] == c) { 116 return i; 117 } 118 } 119 throw new IllegalArgumentException ("Impossible to decrypt '"+c+"'. Unhandled character."); 120 } 121 122 } 123 | Popular Tags |