lumis.util.collections

Class Tuple2<A,B>

java.lang.Object

lumis.util.collections.Tuple2<A,B>

Type Parameters:

A - The object a type.

B - The object b type.

Direct Known Subclasses:

Tuple3

public class Tuple2<A,B>
extends Object

Two-object holder. The two objects are called by convention, a and b.
Implements equals(Object) and hashCode(), based on the two objects.
If two tuples tup1 and tup2 have the same objects, but in different order, tup1.equals(tup2) may be false and tup1.hashCode() == tup2.hashCode() may be false.
Example:
Tuple2.newInstance(1, 2).equals(Tuple2.newInstance(2, 1)) is false.
Tuple2.newInstance(1, 2).hashCode() == Tuple2.newInstance(2, 1).hashCode() is false.
This holder accepts null values.

Since:

11.0.0

Version:

$Revision: 21880 $ $Date: 2018-09-21 20:07:19 +0000 (Fri, 21 Sep 2018) $

Method Summary

Modifier and Type	Method and Description
A	a()
B	b()
boolean	equals(Object obj)
int	hashCode()
boolean	isEmpty() Returns whether this tupple is empty (composed with null values).
static <A,B> Tuple2<A,B>	of(A a, B b) Creates a new instance.
String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

of

public static <A,B> Tuple2<A,B> of(A a,
                                   B b)

Creates a new instance.

Parameters:

a - the object a.

b - the object b.

Returns:

the created instance.

Since:

11.0.0

a

public A a()

b

public B b()

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

isEmpty

public boolean isEmpty()

Returns whether this tupple is empty (composed with null values).

Returns:

whether this tupple is empty (composed with null values).

Since:

11.0.0