*
   * <p><b>Java 8+ users:</b> use {@link Long#divideUnsigned(long, long)} instead.
   *
   * @param dividend the dividend (numerator)
   * @param divisor the divisor (denominator)
   * @throws ArithmeticException if divisor is 0
   */
  public static long divide(long dividend, long divisor) {
    if (divisor < 0) { // i.e., divisor >= 2^63:
      if (compare(dividend, divisor) < 0) {
        return 0; // dividend < divisor

   * @throws IllegalArgumentException if {@code duration} is negative
   * @throws IllegalStateException if {@link #expireAfterWrite} was already set
   * @throws ArithmeticException for durations greater than +/- approximately 292 years
   * @since 33.3.0 (but since 25.0 in the JRE <a
   *     href="https://github.com/google/guava#guava-google-core-libraries-for-java">flavor</a>)
   */

   * @throws IllegalArgumentException if {@code duration} is negative
   * @throws IllegalStateException if {@link #expireAfterWrite} was already set
   * @throws ArithmeticException for durations greater than +/- approximately 292 years
   * @since 25.0 (but only since 33.3.0 in the Android <a
   *     href="https://github.com/google/guava#guava-google-core-libraries-for-java">flavor</a>)
   */

    ListeningExecutorService e = newDirectExecutorService();
    List<Callable<Integer>> l = new ArrayList<>();
    l.add(
        () -> {
          throw new ArithmeticException("/ by zero");
        });
    l.add(null);
    try {
      invokeAnyImpl(e, l, false, 0, NANOSECONDS);
      fail();
    } catch (NullPointerException success) {
    } finally {
      joinPool(e);

            if (existingCounter.compareAndSet(oldValue, newValue)) {
              // newValue can't == 0, so no need to check & remove
              return oldValue;
            }
          } catch (ArithmeticException overflow) {
            throw new IllegalArgumentException(
                "Overflow adding " + occurrences + " occurrences to a count of " + oldValue);
          }
        } else {

    ListeningExecutorService e = newDirectExecutorService();
    List<Callable<Integer>> l = new ArrayList<>();
    l.add(
        () -> {
          throw new ArithmeticException("/ by zero");
        });
    l.add(null);
    try {
      invokeAnyImpl(e, l, false, 0, NANOSECONDS);
      fail();
    } catch (NullPointerException success) {
    } finally {
      joinPool(e);

            if (existingCounter.compareAndSet(oldValue, newValue)) {
              // newValue can't == 0, so no need to check & remove
              return oldValue;
            }
          } catch (ArithmeticException overflow) {
            throw new IllegalArgumentException(
                "Overflow adding " + occurrences + " occurrences to a count of " + oldValue);
          }
        } else {

        assertEquals(100, InputValidator.safeAdd(50, 50));
        assertEquals(0, InputValidator.safeAdd(-50, 50));

        assertThrows(ArithmeticException.class, () -> InputValidator.safeAdd(Integer.MAX_VALUE, 1));
        assertThrows(ArithmeticException.class, () -> InputValidator.safeAdd(Integer.MIN_VALUE, -1));
    }

    @Test
    @DisplayName("Test safe integer multiplication")

   *
   * <p><b>Note:</b> this method is now unnecessary and should be treated as deprecated. Use {@link
   * Math#toIntExact(long)} instead, but be aware that that method throws {@link
   * ArithmeticException} rather than {@link IllegalArgumentException}.
   *
   * @param value any value in the range of the {@code int} type
   * @return the {@code int} value that equals {@code value}

        }
      }
    }
  }

  public void testDivideByZeroThrows() {
    for (int a : TEST_INTS) {
      assertThrows(
          ArithmeticException.class,
          () -> {
            UnsignedInteger unused = UnsignedInteger.fromIntBits(a).dividedBy(UnsignedInteger.ZERO);
          });
    }
  }

  public void testMod() {