7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
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 which accepts two input arguments and returns no result. This is
29 * the two-arity specialization of {@link Consumer}. Unlike most other
30 * functional interfaces, {@code BiConsumer} is expected to operate via
31 * side-effects.
32 *
33 * @param <T> the type of the first argument to the {@code accept} operation.
34 * @param <U> the type of the second argument to the {@code accept} operation.
35 *
36 * @see Consumer
37 * @since 1.8
38 */
39 @FunctionalInterface
40 public interface BiConsumer<T, U> {
41
42 /**
43 * Performs operations upon the provided objects which may modify those
44 * objects and/or external state.
45 *
46 * @param t an input object
47 * @param u an input object
48 */
49 void accept(T t, U u);
50 }
|
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
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 import java.util.Objects;
28
29 /**
30 * An operation which accepts two input arguments and returns no result. This is
31 * the two-arity specialization of {@link Consumer}. Unlike most other
32 * functional interfaces, {@code BiConsumer} is expected to operate via
33 * side-effects.
34 *
35 * @param <T> the type of the first argument to the {@code accept} operation
36 * @param <U> the type of the second argument to the {@code accept} operation
37 *
38 * @see Consumer
39 * @since 1.8
40 */
41 @FunctionalInterface
42 public interface BiConsumer<T, U> {
43
44 /**
45 * Performs operations upon the provided objects which may modify those
46 * objects and/or external state.
47 *
48 * @param t an input object
49 * @param u an input object
50 */
51 void accept(T t, U u);
52
53 /**
54 * Returns a BiConsumer which performs in sequence the {@code accept}
55 * methods of multiple BiConsumers. This BiConsumer's {@code accept} method
56 * is performed followed by the {@code accept} method of the specified
57 * BiConsumer operation.
58 *
59 * @param other an additional BiConsumer which will be chained after this
60 * BiConsumer
61 * @return a BiConsumer which performs in sequence the {@code accept} method
62 * of this BiConsumer and the {@code accept} method of the specified
63 * BiConsumer operation
64 * @throws NullPointerException if other is null
65 */
66 default BiConsumer<T, U> chain(BiConsumer<? super T, ? super U> other) {
67 Objects.requireNonNull(other);
68
69 return (l, r) -> {
70 accept(l, r);
71 other.accept(l, r);
72 };
73 }
74 }
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