11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package java.util.function;
26
27 /**
28 * An operation on a single {@code double} operand yielding a {@code double}
29 * result.
30 *
31 * @since 1.8
32 */
33 public interface DoubleUnaryOperator {
34
35 /**
36 * Returns the {@code double} result of the operation upon the
37 * {@code double} operand.
38 *
39 * @param operand the operand value
40 * @return the operation result value
41 */
42 public double operateAsDouble(double operand);
43 }
|
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package java.util.function;
26
27 /**
28 * An operation on a single {@code double} operand yielding a {@code double}
29 * result.
30 *
31 * <p/>This is the primitive type specialization of {@link UnaryOperator} for
32 * {@code double} and also may be used as a {@code UnaryOperator<Double>}. When
33 * used as a {@code UnaryOperator} the default {@code operate} implementation
34 * provided by this interface neither accepts null parameters nor does it return
35 * null results.
36 *
37 * @since 1.8
38 */
39 public interface DoubleUnaryOperator extends UnaryOperator<Double> {
40
41 /**
42 * {@inheritDoc}
43 *
44 * @param operand {@inheritDoc}, must be non-null
45 * @return {@inheritDoc}, always non-null
46 */
47 @Override
48 public default Double operate(Double operand) {
49 return operateAsDouble((double)operand);
50 }
51
52 /**
53 * Returns the {@code double} result of the operation upon the
54 * {@code double} operand.
55 *
56 * @param operand the operand value
57 * @return the operation result value
58 */
59 public double operateAsDouble(double operand);
60 }
|