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java.lang.Objectjava.util.AbstractCollection<E>
java.util.AbstractSet<E>
org.openide.util.WeakSet<E>
public class WeakSet<E>
Set which holds its members by using of WeakReferences. MT level: unsafe.
Note: as of JDK 6.0 (b51), you can instead use
Set<T> s = Collections.newSetFromMap(new WeakHashMap<T, Boolean>());
Constructor Summary | |
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WeakSet()
Constructs a new set. |
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WeakSet(java.util.Collection<? extends E> c)
Constructs a new set containing the elements in the specified collection. |
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WeakSet(int initialCapacity)
Constructs a new, empty set; |
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WeakSet(int initialCapacity,
float loadFactor)
Constructs a new, empty set; |
Method Summary | ||
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boolean |
add(E o)
Adds the specified element to this set if it is not already present. |
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void |
clear()
Removes all of the elements from this set. |
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java.lang.Object |
clone()
Returns a shallow copy of this WeakSet instance: the elements themselves are not cloned. |
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boolean |
contains(java.lang.Object o)
Returns true if this set contains the specified element. |
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boolean |
isEmpty()
Returns true if this set contains no elements. |
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java.util.Iterator<E> |
iterator()
Returns an iterator over the elements in this set. |
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boolean |
remove(java.lang.Object o)
Removes the given element from this set if it is present. |
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int |
size()
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java.lang.Object[] |
toArray()
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toArray(T[] array)
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java.lang.String |
toString()
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Methods inherited from class java.util.AbstractSet |
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equals, hashCode, removeAll |
Methods inherited from class java.util.AbstractCollection |
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addAll, containsAll, retainAll |
Methods inherited from class java.lang.Object |
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finalize, getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface java.util.Set |
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addAll, containsAll, retainAll |
Constructor Detail |
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public WeakSet()
public WeakSet(java.util.Collection<? extends E> c)
c
- a collection to addpublic WeakSet(int initialCapacity)
initialCapacity
- initial capacitypublic WeakSet(int initialCapacity, float loadFactor)
initialCapacity
- initial capacityloadFactor
- load factorMethod Detail |
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public boolean add(E o)
add
in interface java.util.Collection<E>
add
in interface java.util.Set<E>
add
in class java.util.AbstractCollection<E>
o
- an Object to addpublic void clear()
clear
in interface java.util.Collection<E>
clear
in interface java.util.Set<E>
clear
in class java.util.AbstractCollection<E>
public java.lang.Object clone()
clone
in class java.lang.Object
public boolean contains(java.lang.Object o)
contains
in interface java.util.Collection<E>
contains
in interface java.util.Set<E>
contains
in class java.util.AbstractCollection<E>
o
- an Object to examinepublic boolean isEmpty()
isEmpty
in interface java.util.Collection<E>
isEmpty
in interface java.util.Set<E>
isEmpty
in class java.util.AbstractCollection<E>
public java.util.Iterator<E> iterator()
iterator
in interface java.lang.Iterable<E>
iterator
in interface java.util.Collection<E>
iterator
in interface java.util.Set<E>
iterator
in class java.util.AbstractCollection<E>
public boolean remove(java.lang.Object o)
remove
in interface java.util.Collection<E>
remove
in interface java.util.Set<E>
remove
in class java.util.AbstractCollection<E>
o
- an Object to remove
public int size()
size
in interface java.util.Collection<E>
size
in interface java.util.Set<E>
size
in class java.util.AbstractCollection<E>
public <T> T[] toArray(T[] array)
toArray
in interface java.util.Collection<E>
toArray
in interface java.util.Set<E>
toArray
in class java.util.AbstractCollection<E>
public java.lang.Object[] toArray()
toArray
in interface java.util.Collection<E>
toArray
in interface java.util.Set<E>
toArray
in class java.util.AbstractCollection<E>
public java.lang.String toString()
toString
in class java.util.AbstractCollection<E>
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