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
26 package java.lang;
27
28 import java.util.Iterator;
29
30 /**
31 * Implementing this interface allows an object to be the target of
32 * the "foreach" statement.
33 *
34 * @param <T> the type of elements returned by the iterator
35 *
36 * @since 1.5
37 */
38 public interface Iterable<T> {
39
40 /**
41 * Returns an iterator over a set of elements of type T.
42 *
43 * @return an Iterator.
44 */
45 Iterator<T> iterator();
46 }
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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
26 package java.lang;
27
28 import java.util.Iterator;
29 import java.util.Objects;
30 import java.util.function.Block;
31
32 /**
33 * Implementing this interface allows an object to be the target of
34 * the "foreach" statement.
35 *
36 * @param <T> the type of elements returned by the iterator
37 *
38 * @since 1.5
39 */
40 public interface Iterable<T> {
41
42 /**
43 * Returns an iterator over a set of elements of type T.
44 *
45 * @return an Iterator.
46 */
47 Iterator<T> iterator();
48
49 /**
50 * Execute the specified Block for each element
51 *
52 * @param block The Block to which elements will be provided
53 * @throws NullPointerException if the specified block is null
54 * @since 1.8
55 */
56 public default void forEach(Block<? super T> block) {
57 Objects.requireNonNull(block);
58 for (T t : this) {
59 block.accept(t);
60 }
61 }
62 }
|