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src/java.base/share/classes/java/util/HashSet.java

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   1 /*
   2  * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   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


 340             @SuppressWarnings("unchecked")
 341                 E e = (E) s.readObject();
 342             map.put(e, PRESENT);
 343         }
 344     }
 345 
 346     /**
 347      * Creates a <em><a href="Spliterator.html#binding">late-binding</a></em>
 348      * and <em>fail-fast</em> {@link Spliterator} over the elements in this
 349      * set.
 350      *
 351      * <p>The {@code Spliterator} reports {@link Spliterator#SIZED} and
 352      * {@link Spliterator#DISTINCT}.  Overriding implementations should document
 353      * the reporting of additional characteristic values.
 354      *
 355      * @return a {@code Spliterator} over the elements in this set
 356      * @since 1.8
 357      */
 358     public Spliterator<E> spliterator() {
 359         return new HashMap.KeySpliterator<>(map, 0, -1, 0, 0);
 360     }
 361 
 362     @Override
 363     public Object[] toArray() {
 364         return map.keysToArray(new Object[map.size()]);
 365     }
 366 
 367     @Override
 368     public <T> T[] toArray(T[] a) {
 369         return map.keysToArray(map.prepareArray(a));
 370     }
 371 }
   1 /*
   2  * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   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


 340             @SuppressWarnings("unchecked")
 341                 E e = (E) s.readObject();
 342             map.put(e, PRESENT);
 343         }
 344     }
 345 
 346     /**
 347      * Creates a <em><a href="Spliterator.html#binding">late-binding</a></em>
 348      * and <em>fail-fast</em> {@link Spliterator} over the elements in this
 349      * set.
 350      *
 351      * <p>The {@code Spliterator} reports {@link Spliterator#SIZED} and
 352      * {@link Spliterator#DISTINCT}.  Overriding implementations should document
 353      * the reporting of additional characteristic values.
 354      *
 355      * @return a {@code Spliterator} over the elements in this set
 356      * @since 1.8
 357      */
 358     public Spliterator<E> spliterator() {
 359         return new HashMap.KeySpliterator<>(map, 0, -1, 0, 0);










 360     }
 361 }
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