src/java.xml/share/classes/com/sun/xml/internal/stream/writers/UTF8OutputStreamWriter.java

@@ -87,11 +87,11 @@
         }
 
         // Otherwise, encode char as defined in UTF-8
         if (c < 0x80) {
             // 1 byte, 7 bits
-            out.write((int) c);
+            out.write(c);
         }
         else if (c < 0x800) {
             // 2 bytes, 11 bits
             out.write(0xC0 | (c >> 6));    // first 5
             out.write(0x80 | (c & 0x3F));  // second 6