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Class structure.SetList

java.lang.Object
    |
    +----structure.SetList

public class SetList

extends Object

implements Set

SetList()

Construct a new set list.

add(Object)

Add an element to set, if not already present.

clear()

Remove all the elements from the set.

clone()

Returns a shallow clone of this set.

contains(Object)

Returns true if value is an element of the set.

difference(Set)

Compute the difference between two sets.

elements()

Construct an iterator to traverse the elements of the set.

intersection(Set)

Compute the intersection of this set and other.

isEmpty()

Determine if the set is empty.

remove(Object)

Remove an element from the set.

size()

Determine the number of elements in the set.

subset(Set)

Determine if this set is a subset of other.

toString()

Construct a string representation of the set.

union(Set)

Compute the union of this set with other.

public SetList()

Construct a new set list.

Postcondition:

constructs a new, empty set

public void clear()

Remove all the elements from the set.

Postcondition:

elements of set are removed

public boolean isEmpty()

Determine if the set is empty.

Postcondition:

returns true iff set is empty

Returns:

True iff there are no elements in set.

public void add(Object e)

Add an element to set, if not already present.

Precondition:

e is non-null object

Postcondition:

adds element e to interface

Parameters:

e - The new value to be added to set.

public Object remove(Object e)

Remove an element from the set.

Precondition:

e is non-null object

Postcondition:

e is removed from set, value returned

Parameters:

e - The element of the set to be removed.

Returns:

The value actually removed.

public boolean contains(Object e)

Returns true if value is an element of the set.

Precondition:

e is non-null

Postcondition:

returns true iff e is in set

Parameters:

e - The element sought in set.

Returns:

True iff the element is in the set.

public boolean subset(Set other)

Determine if this set is a subset of other.

Precondition:

other is non-null reference to set

Postcondition:

returns true iff this set is subset of other

Parameters:

other - The potential superset.

public Object clone()

Returns a shallow clone of this set.

Postcondition:

returns a copy of set

Returns:

A new set with same values.

Overrides:

clone in class Object

public Object union(Set other)

Compute the union of this set with other. This set not modified.

Precondition:

other is non-null reference to set

Postcondition:

returns new set containing union of this and other

Parameters:

other - The set to be unioned with this.

Returns:

Union of this and other.

public Object intersection(Set other)

Compute the intersection of this set and other. Members of result are in both this and other.

Precondition:

other is non-null reference to set

Postcondition:

returns new set containing intersection of this and other

Parameters:

other - The other set to be intersected with this.

Returns:

Intersection of this and other.

public Object difference(Set other)

Compute the difference between two sets. Values of the result are members of this, but not other.

Precondition:

other is non-null reference to set

Postcondition:

returns new set containing difference of this and other

Parameters:

other - The set whose values are to be eliminated from this.

Returns:

Difference between this and other.

public Iterator elements()

Construct an iterator to traverse the elements of the set. Elements will not appear in any particular order.

Postcondition:

returns iterator to traverse the elements of set

Returns:

An iterator for inspecting members of the set.

public int size()

Determine the number of elements in the set.

Postcondition:

returns number of elements in set

Returns:

The number of elements in the set.

public String toString()

Construct a string representation of the set.

Postcondition:

returns a string representation of set

Returns:

A string representing the set.

Overrides:

toString in class Object

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