1  public static String fromEncodedUnicode(char[] in, int off, int len) {
  2 
  3         char aChar;
  4 
  5         char[] out = new char[len]; 
  6 
  7         int outLen = 0;
  8 
  9         int end = off + len;
 10 
 11         while (off < end) {
 12 
 13             aChar = in[off++];
 14 
 15             if (aChar == ‘\\‘) {
 16 
 17                 aChar = in[off++];
 18 
 19                 if (aChar == ‘u‘) {
 20 
 21                     // Read the xxxx
 22 
 23                     int value = 0;
 24 
 25                     for (int i = 0; i < 4; i++) {
 26 
 27                         aChar = in[off++];
 28 
 29                         switch (aChar) {
 30 
 31                             case ‘0‘:
 32 
 33                             case ‘1‘:
 34 
 35                             case ‘2‘:
 36 
 37                             case ‘3‘:
 38 
 39                             case ‘4‘:
 40 
 41                             case ‘5‘:
 42 
 43                             case ‘6‘:
 44 
 45                             case ‘7‘:
 46 
 47                             case ‘8‘:
 48 
 49                             case ‘9‘:
 50 
 51                                 value = (value << 4) + aChar - ‘0‘;
 52 
 53                                 break;
 54 
 55                             case ‘a‘:
 56 
 57                             case ‘b‘:
 58 
 59                             case ‘c‘:
 60 
 61                             case ‘d‘:
 62 
 63                             case ‘e‘:
 64 
 65                             case ‘f‘:
 66 
 67                                 value = (value << 4) + 10 + aChar - ‘a‘;
 68 
 69                                 break;
 70 
 71                             case ‘A‘:
 72 
 73                             case ‘B‘:
 74 
 75                             case ‘C‘:
 76 
 77                             case ‘D‘:
 78 
 79                             case ‘E‘:
 80 
 81                             case ‘F‘:
 82 
 83                                 value = (value << 4) + 10 + aChar - ‘A‘;
 84 
 85                                 break;
 86 
 87                             default:
 88 
 89                                 throw new IllegalArgumentException("Malformed \\uxxxx encoding.");
 90 
 91                         }
 92 
 93                     }
 94 
 95                     out[outLen++] = (char) value;
 96 
 97                 } else {
 98 
 99                     if (aChar == ‘t‘) {
100 
101                         aChar = ‘\t‘;
102 
103                     } else if (aChar == ‘r‘) {
104 
105                         aChar = ‘\r‘;
106 
107                     } else if (aChar == ‘n‘) {
108 
109                         aChar = ‘\n‘;
110 
111                     } else if (aChar == ‘f‘) {
112 
113                         aChar = ‘\f‘;
114 
115                     }
116 
117                     out[outLen++] = aChar;
118 
119                 }
120 
121             } else {
122 
123                 out[outLen++] = (char) aChar;
124 
125             }
126 
127         }
128 
129         return new String(out, 0, outLen);
130 
131     }