com.hp.util.tuple

Class Pair<T1,T2>

java.lang.Object

com.hp.util.tuple.UnaryTuple<T1>

com.hp.util.tuple.Pair<T1,T2>

Type Parameters:

T1 - Type for the first element of the tuple.

T2 - Type for the second element of the tuple.

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

Triplet

public class Pair<T1,T2>
extends UnaryTuple<T1>

In mathematics and computer science a tuple captures the intuitive notion of an ordered list of elements. Depending on the mathematical foundation chosen, the formal notion differs slightly. In set theory, an (ordered) n-tuple is a sequence (or ordered list) of n elements, where n is a positive integer. The main properties that distinguish a tuple from, for example, a set are that 1. It can contain an object more than once; 2. The objects appear in a certain order; 3. It has finite size.

Author:

Fabiel Zuniga

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Pair(T1 first, T2 second) Constructs a 2-tuple.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
T2	getSecond() Gets the second element of the tuple.
int	hashCode()
void	setSecond(T2 second) Sets the second element of the tuple.
String	toString()
static <TT1,TT2> Pair<TT1,TT2>	valueOf(TT1 first, TT2 second) Creates a new 2-tuple using the given values.

Methods inherited from class com.hp.util.tuple.UnaryTuple

getFirst, setFirst, valueOf

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Pair

protected Pair(T1 first,
               T2 second)

Constructs a 2-tuple.

Parameters:

first - First element in the tuple.

second - Second element in the tuple.

Method Detail

valueOf

public static <TT1,TT2> Pair<TT1,TT2> valueOf(TT1 first,
                                              TT2 second)

Creates a new 2-tuple using the given values.

Type Parameters:

TT1 - the type for the first element of the tuple.

TT2 - the type for the second element of the tuple.

Parameters:

first - First element in the tuple.

second - Second element in the tuple.

Returns:

a new 2-tuple using the given values.

getSecond

public T2 getSecond()

Gets the second element of the tuple.

Returns:

The second element.

setSecond

public void setSecond(T2 second)

Sets the second element of the tuple.

Parameters:

second - The Second element.

hashCode

public int hashCode()

Overrides:

hashCode in class UnaryTuple<T1>

equals

public boolean equals(Object obj)

Overrides:

equals in class UnaryTuple<T1>

toString

public String toString()

Overrides:

toString in class UnaryTuple<T1>