1522 */
1523 public static int signum(long i) {
1524 // HD, Section 2-7
1525 return (int) ((i >> 63) | (-i >>> 63));
1526 }
1527
1528 /**
1529 * Returns the value obtained by reversing the order of the bytes in the
1530 * two's complement representation of the specified {@code long} value.
1531 *
1532 * @return the value obtained by reversing the bytes in the specified
1533 * {@code long} value.
1534 * @since 1.5
1535 */
1536 public static long reverseBytes(long i) {
1537 i = (i & 0x00ff00ff00ff00ffL) << 8 | (i >>> 8) & 0x00ff00ff00ff00ffL;
1538 return (i << 48) | ((i & 0xffff0000L) << 16) |
1539 ((i >>> 16) & 0xffff0000L) | (i >>> 48);
1540 }
1541
1542 /** use serialVersionUID from JDK 1.0.2 for interoperability */
1543 private static final long serialVersionUID = 4290774380558885855L;
1544 }
|
1522 */
1523 public static int signum(long i) {
1524 // HD, Section 2-7
1525 return (int) ((i >> 63) | (-i >>> 63));
1526 }
1527
1528 /**
1529 * Returns the value obtained by reversing the order of the bytes in the
1530 * two's complement representation of the specified {@code long} value.
1531 *
1532 * @return the value obtained by reversing the bytes in the specified
1533 * {@code long} value.
1534 * @since 1.5
1535 */
1536 public static long reverseBytes(long i) {
1537 i = (i & 0x00ff00ff00ff00ffL) << 8 | (i >>> 8) & 0x00ff00ff00ff00ffL;
1538 return (i << 48) | ((i & 0xffff0000L) << 16) |
1539 ((i >>> 16) & 0xffff0000L) | (i >>> 48);
1540 }
1541
1542 /**
1543 * Adds two {@code long} values together as per the + operator.
1544 *
1545 * @param a the first operand
1546 * @param b the second operand
1547 * @return the sum of {@code a} and {@code b}
1548 * @see java.util.function.BinaryOperator
1549 * @since 1.8
1550 */
1551 public static long sum(long a, long b) {
1552 return a + b;
1553 }
1554
1555 /**
1556 * Returns the greater of two {@code long} values.
1557 *
1558 * @param a the first operand
1559 * @param b the second operand
1560 * @return the larger of {@code a} and {@code b}
1561 * @see java.util.function.BinaryOperator
1562 * @since 1.8
1563 */
1564 public static long max(long a, long b) {
1565 return Math.max(a, b);
1566 }
1567
1568 /**
1569 * Returns the lesser of two {@code long} values.
1570 *
1571 * @param a the first operand
1572 * @param b the second operand
1573 * @return the lesser of {@code a} and {@code b}
1574 * @see java.util.function.BinaryOperator
1575 * @since 1.8
1576 */
1577 public static long min(long a, long b) {
1578 return Math.min(a, b);
1579 }
1580
1581 /** use serialVersionUID from JDK 1.0.2 for interoperability */
1582 private static final long serialVersionUID = 4290774380558885855L;
1583 }
|