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85 * this class does not permit the use of {@code null} elements, |
85 * this class does not permit the use of {@code null} elements, |
86 * because {@code null} arguments and return values cannot be reliably |
86 * because {@code null} arguments and return values cannot be reliably |
87 * distinguished from the absence of elements. |
87 * distinguished from the absence of elements. |
88 * |
88 * |
89 * <p>This class is a member of the |
89 * <p>This class is a member of the |
90 * <a href="{@docRoot}/../technotes/guides/collections/index.html"> |
90 * <a href="{@docRoot}/java/util/package-summary.html#CollectionsFramework"> |
91 * Java Collections Framework</a>. |
91 * Java Collections Framework</a>. |
92 * |
92 * |
93 * @author Doug Lea |
93 * @author Doug Lea |
94 * @param <E> the type of elements maintained by this set |
94 * @param <E> the type of elements maintained by this set |
95 * @since 1.6 |
95 * @since 1.6 |