--- /QuotedPrintableCodec.java	2023-07-05 02:20:42.222125413 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/net/QuotedPrintableCodec.java	2023-07-05 02:20:42.222125413 +0200
@@ -140,8 +140,9 @@
             return null;
         }
         if (printable == null) {
-            printable = PRINTABLE_CHARS;
-        }
+ 
+printable = org.apache.commons.codec.net.QuotedPrintableCodec.PRINTABLE_CHARS; 
+ 
         ByteArrayOutputStream buffer = new ByteArrayOutputStream();
         for (int i = 0; i < bytes.length; i++) {
             int b = bytes[i];
