delete isHexadecimal

Author: JuliaRecalde

jpos/src/main/java/org/jpos/iso/ISOUtil.java

@@ -182,18 +182,6 @@ public static String zeropad(String s, int len) throws ISOException {
         return padleft(s, len, '0');
     }
 
-    public static boolean isHexadecimal(byte[] bytes) {
-        for (byte b : bytes) {
-            int unsignedByte = b & 0xFF;
-            if (!((unsignedByte >= 0x30 && unsignedByte <= 0x39) ||  // Dígitos 0-9
-                  (unsignedByte >= 0x41 && unsignedByte <= 0x46) ||  // Letras A-F
-                  (unsignedByte >= 0x61 && unsignedByte <= 0x66))) {  // Letras a-f
-                return false;
-            }
-        }
-        return true;
-    }
-    
     /**
      * zeropads a long without throwing an ISOException (performs modulus operation)
      *

jpos/src/test/java/org/jpos/iso/ISOUtilTest.java

@@ -67,7 +67,7 @@ public void testHex2byte_ValidInput() {
     public void testHex2byte_InvalidInput_ThrowsExceptionWithMessage() {
 
         Exception exception = assertThrows(IllegalArgumentException.class, () -> {
-            ISOUtil.hex2byte("1111");
+            ISOUtil.hex2byte("1A2B3C");
         }, "Not hex");
 
         assertEquals("Not hex", exception.getMessage());