# | Line 59 | Line 59 | import java.io.ObjectOutputStream; | |
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59 | * java.util.HashMap}, this class does NOT allow <tt>null</tt> to be | |
60 | * used as a key or value. | |
61 | * | |
62 | + | * <p>This class is a member of the |
63 | + | * <a href="{@docRoot}/../guide/collections/index.html"> |
64 | + | * Java Collections Framework</a>. |
65 | + | * |
66 | * @since 1.5 | |
67 | * @author Doug Lea | |
68 | * @param <K> the type of keys maintained by this map |
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