src/share/classes/java/lang/Byte.java

*** 444,453 ****
--- 444,484 ----
      public static int compare(byte x, byte y) {
          return x - y;
      }
  
      /**
+      * Converts the argument to an {@code int} by an unsigned
+      * conversion.  In an unsigned conversion to an {@code int}, the
+      * high-order 24 bits of the {@code int} are zero and the
+      * low-order 8 bits are equal to the bits of the {@code byte} argument.
+      *
+      * @return the argument converted to {@code int} by an unsigned
+      *         conversion
+      * @param  x the value to convert to an unsigned {@code int}
+      * @since 1.8
+      */
+     public static int toUnsignedInt(byte x) {
+         return ((int) x) & 0xff;
+     }
+ 
+     /**
+      * Converts the argument to a {@code long} by an unsigned
+      * conversion.  In an unsigned conversion to a {@code long}, the
+      * high-order 56 bits of the {@code long} are zero and the
+      * low-order 8 bits are equal to the bits of the {@code byte} argument.
+      *
+      * @return the argument converted to {@code long} by an unsigned
+      *         conversion
+      * @param  x the value to convert to an unsigned {@code long}
+      * @since 1.8
+      */
+     public static long toUnsignedLong(byte x) {
+         return ((long) x) & 0xffL;
+     }
+ 
+ 
+     /**
       * The number of bits used to represent a {@code byte} value in two's
       * complement binary form.
       *
       * @since 1.5
       */