aima.core.util

Class SetOps

java.lang.Object

aima.core.util.SetOps

public class SetOps
extends java.lang.Object

Note: This code is based on - Java Tutorial: The Set Interface
Using LinkedHashSet, even though slightly slower than HashSet, in order to ensure order is always respected (i.e. if called with TreeSet or LinkedHashSet implementations).

Author:

Ciaran O'Reilly, Ravi Mohan

Constructor Summary

Constructors

Constructor and Description
SetOps()

Method Summary

Modifier and Type	Method and Description
static <T> java.util.Set<T>	difference(java.util.Set<T> s1, java.util.Set<T> s2)
static <T> java.util.Set<T>	intersection(java.util.Set<T> s1, java.util.Set<T> s2)
static <T> java.util.Set<T>	union(java.util.Set<T> s1, java.util.Set<T> s2)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SetOps

public SetOps()

Method Detail

union

public static <T> java.util.Set<T> union(java.util.Set<T> s1,
                                         java.util.Set<T> s2)

Type Parameters:

T -

Parameters:

s1 -

s2 -

Returns:

the union of s1 and s2. (The union of two sets is the set containing all of the elements contained in either set.)

intersection

public static <T> java.util.Set<T> intersection(java.util.Set<T> s1,
                                                java.util.Set<T> s2)

Type Parameters:

T -

Parameters:

s1 -

s2 -

Returns:

the intersection of s1 and s2. (The intersection of two sets is the set containing only the elements common to both sets.)

difference

public static <T> java.util.Set<T> difference(java.util.Set<T> s1,
                                              java.util.Set<T> s2)

Type Parameters:

T -

Parameters:

s1 -

s2 -

Returns:

the (asymmetric) set difference of s1 and s2. (For example, the set difference of s1 minus s2 is the set containing all of the elements found in s1 but not in s2.)