AbstractSet (Codename One API)

java.lang.Object
- java.util.AbstractCollection<E>
- - java.util.AbstractSet<E>

All Implemented Interfaces:

Iterable<E>, Collection<E>, Set<E>

Direct Known Subclasses:

HashSet, TreeSet
```
public abstract class AbstractSet<E>
extends AbstractCollection<E>
implements Set<E>
```
An AbstractSet is an abstract implementation of the Set interface. This implementation does not support adding. A subclass must implement the abstract methods iterator() and size().

Since:

1.2

Constructor Summary

Constructors
Modifier Constructor and Description

protected AbstractSet()
Constructs a new instance of this AbstractSet.

Constructors
Modifier	Constructor and Description
`protected`	`AbstractSet()` Constructs a new instance of this AbstractSet.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`equals(Object object)` Compares the specified object to this Set and returns true if they are equal.
`int`	`hashCode()` Returns the hash code for this set.
`boolean`	`removeAll(Collection<?> collection)` Removes all occurrences in this collection which are contained in the specified collection.

Methods inherited from class java.util.AbstractCollection
add, addAll, clear, contains, containsAll, isEmpty, iterator, remove, retainAll, size, toArray, toArray, toString

Methods inherited from class java.lang.Object
clone, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Set
add, addAll, clear, contains, containsAll, isEmpty, iterator, remove, retainAll, size, toArray, toArray

- Constructor Detail
  - AbstractSet
```
protected AbstractSet()
```
    Constructs a new instance of this AbstractSet.
- Method Detail
  - equals
```
public boolean equals(Object object)
```
    Compares the specified object to this Set and returns true if they are equal. The object must be an instance of Set and contain the same objects.
    
    Specified by:
    
    equals in interface Collection<E>
    
    Specified by:
    
    equals in interface Set<E>
    
    Overrides:
    
    equals in class Object
    
    Parameters:
    
    object - the object to compare with this set.
    
    Returns:
    
    true if the specified object is equal to this set, false otherwise
    
    See Also:
    
    hashCode()
  - hashCode
```
public int hashCode()
```
    Returns the hash code for this set. Two set which are equal must return the same value. This implementation calculates the hash code by adding each element's hash code.
    
    Specified by:
    
    hashCode in interface Collection<E>
    
    Specified by:
    
    hashCode in interface Set<E>
    
    Overrides:
    
    hashCode in class Object
    
    Returns:
    
    the hash code of this set.
    
    See Also:
    
    equals(java.lang.Object)
  - removeAll
```
public boolean removeAll(Collection<?> collection)
```
    Removes all occurrences in this collection which are contained in the specified collection.
    
    Specified by:
    
    removeAll in interface Collection<E>
    
    Specified by:
    
    removeAll in interface Set<E>
    
    Overrides:
    
    removeAll in class AbstractCollection<E>
    
    Parameters:
    
    collection - the collection of objects to remove.
    
    Returns:
    
    true if this collection was modified, false otherwise.
    
    Throws:
    
    UnsupportedOperationException - if removing from this collection is not supported.

Class AbstractSet<E>

Constructor Summary

Method Summary

Methods inherited from class java.util.AbstractCollection

Methods inherited from class java.lang.Object

Methods inherited from interface java.util.Set

Constructor Detail

AbstractSet

Method Detail

equals

hashCode

removeAll