IntSet

All Known Implementing Classes:

IntervalSet
```
public interface IntSet
```
A generic set of integers.

See Also:

IntervalSet

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`add(int el)` Adds the specified value to the current set.
`IntSet`	`addAll(IntSet set)` Modify the current `IntSet` object to contain all elements that are present in itself, the specified `set`, or both.
`IntSet`	`and(IntSet a)` Return a new `IntSet` object containing all elements that are present in both the current set and the specified set `a`.
`IntSet`	`complement(IntSet elements)` Return a new `IntSet` object containing all elements that are present in `elements` but not present in the current set.
`boolean`	`contains(int el)` Returns `true` if the set contains the specified element.
`boolean`	`equals(Object obj)`
`boolean`	`isNil()` Returns `true` if this set contains no elements.
`IntSet`	`or(IntSet a)` Return a new `IntSet` object containing all elements that are present in the current set, the specified set `a`, or both.
`void`	`remove(int el)` Removes the specified value from the current set.
`int`	`size()` Return the total number of elements represented by the current set.
`IntSet`	`subtract(IntSet a)` Return a new `IntSet` object containing all elements that are present in the current set but not present in the input set `a`.
`List<Integer>`	`toList()` Return a list containing the elements represented by the current set.
`String`	`toString()`

- Method Detail
  - add
```
void add(int el)
```
    Adds the specified value to the current set.
    
    Parameters:
    
    el - the value to add
    
    Throws:
    
    IllegalStateException - if the current set is read-only
  - addAll
```
IntSet addAll(IntSet set)
```
    Modify the current IntSet object to contain all elements that are present in itself, the specified set, or both.
    
    Parameters:
    
    set - The set to add to the current set. A null argument is treated as though it were an empty set.
    
    Returns:
    
    this (to support chained calls)
    
    Throws:
    
    IllegalStateException - if the current set is read-only
  - and
```
IntSet and(IntSet a)
```
    Return a new IntSet object containing all elements that are present in both the current set and the specified set a.
    
    Parameters:
    
    a - The set to intersect with the current set. A null argument is treated as though it were an empty set.
    
    Returns:
    
    A new IntSet instance containing the intersection of the current set and a. The value null may be returned in place of an empty result set.
  - complement
```
IntSet complement(IntSet elements)
```
    Return a new IntSet object containing all elements that are present in elements but not present in the current set. The following expressions are equivalent for input non-null IntSet instances x and y.
    - x.complement(y)
    - y.subtract(x)
    Parameters:
    
    elements - The set to compare with the current set. A null argument is treated as though it were an empty set.
    
    Returns:
    
    A new IntSet instance containing the elements present in elements but not present in the current set. The value null may be returned in place of an empty result set.
  - or
```
IntSet or(IntSet a)
```
    Return a new IntSet object containing all elements that are present in the current set, the specified set a, or both.
    This method is similar to IntSet.addAll(IntSet), but returns a new IntSet instance instead of modifying the current set.
    
    Parameters:
    
    a - The set to union with the current set. A null argument is treated as though it were an empty set.
    
    Returns:
    
    A new IntSet instance containing the union of the current set and a. The value null may be returned in place of an empty result set.
  - subtract
```
IntSet subtract(IntSet a)
```
    Return a new IntSet object containing all elements that are present in the current set but not present in the input set a. The following expressions are equivalent for input non-null IntSet instances x and y.
    - y.subtract(x)
    - x.complement(y)
    Parameters:
    
    a - The set to compare with the current set. A null argument is treated as though it were an empty set.
    
    Returns:
    
    A new IntSet instance containing the elements present in elements but not present in the current set. The value null may be returned in place of an empty result set.
  - size
```
int size()
```
    Return the total number of elements represented by the current set.
    
    Returns:
    
    the total number of elements represented by the current set, regardless of the manner in which the elements are stored.
  - isNil
```
boolean isNil()
```
    Returns true if this set contains no elements.
    
    Returns:
    
    true if the current set contains no elements; otherwise, false.
  - equals
```
boolean equals(Object obj)
```
    Overrides:
    
    equals in class Object
  - contains
```
boolean contains(int el)
```
    Returns true if the set contains the specified element.
    
    Parameters:
    
    el - The element to check for.
    
    Returns:
    
    true if the set contains el; otherwise false.
  - remove
```
void remove(int el)
```
    Removes the specified value from the current set. If the current set does not contain the element, no changes are made.
    
    Parameters:
    
    el - the value to remove
    
    Throws:
    
    IllegalStateException - if the current set is read-only
  - toList
```
List<Integer> toList()
```
    Return a list containing the elements represented by the current set. The list is returned in ascending numerical order.
    
    Returns:
    
    A list containing all element present in the current set, sorted in ascending numerical order.
  - toString
```
String toString()
```
    Overrides:
    
    toString in class Object

Interface IntSet

Method Summary

Method Detail

add

addAll

and

complement

or

subtract

size

isNil

equals

contains

remove

toList

toString