--- /URLCodec.java	2023-07-05 02:21:47.674130763 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/net/URLCodec.java	2023-07-05 02:21:47.678130765 +0200
@@ -165,7 +165,7 @@
                 buffer.write(' ');
             } else if (b == '%') {
                 try {
-                    int u = Character.digit((char)bytes[++i], 16);
+int u = Character .forDigit ( i , l )  ;
                     int l = Character.digit((char)bytes[++i], 16);
                     if (u == -1 || l == -1) {
                         throw new DecoderException("Invalid URL encoding");
