Class HashBag<E>
- java.lang.Object
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- org.apache.commons.collections4.bag.AbstractMapBag<E>
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- org.apache.commons.collections4.bag.HashBag<E>
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- Type Parameters:
E
- the type of elements in this bag
- All Implemented Interfaces:
java.io.Serializable
,java.lang.Iterable<E>
,java.util.Collection<E>
,Bag<E>
public class HashBag<E> extends AbstractMapBag<E> implements java.io.Serializable
ImplementsBag
, using aHashMap
to provide the data storage. This is the standard implementation of a bag.A
Bag
stores each object in the collection together with a count of occurrences. Extra methods on the interface allow multiple copies of an object to be added or removed at once. It is important to read the interface javadoc carefully as several methods violate theCollection
interface specification.- Since:
- 3.0 (previously in main package v2.0)
- See Also:
- Serialized Form
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.commons.collections4.bag.AbstractMapBag
AbstractMapBag.BagIterator<E>, AbstractMapBag.MutableInteger
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Field Summary
Fields Modifier and Type Field Description private static long
serialVersionUID
Serial version lock
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description private void
readObject(java.io.ObjectInputStream in)
Read the bag in using a custom routine.private void
writeObject(java.io.ObjectOutputStream out)
Write the bag out using a custom routine.-
Methods inherited from class org.apache.commons.collections4.bag.AbstractMapBag
add, add, addAll, clear, contains, containsAll, containsAll, doReadObject, doWriteObject, equals, getCount, getMap, hashCode, isEmpty, iterator, remove, remove, removeAll, retainAll, retainAll, size, toArray, toArray, toString, uniqueSet
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Field Detail
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serialVersionUID
private static final long serialVersionUID
Serial version lock- See Also:
- Constant Field Values
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Method Detail
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writeObject
private void writeObject(java.io.ObjectOutputStream out) throws java.io.IOException
Write the bag out using a custom routine.- Parameters:
out
- the output stream- Throws:
java.io.IOException
- if an error occurs while writing to the stream
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readObject
private void readObject(java.io.ObjectInputStream in) throws java.io.IOException, java.lang.ClassNotFoundException
Read the bag in using a custom routine.- Parameters:
in
- the input stream- Throws:
java.io.IOException
- if an error occurs while reading from the streamjava.lang.ClassNotFoundException
- if an object read from the stream can not be loaded
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