Tuple2

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 java.lang.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:

$Revision$ $Date$

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`A`	`a()`
`B`	`b()`
`boolean`	`equals(java.lang.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.
`java.lang.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(java.lang.Object obj)
```
    Overrides:
    
    equals in class java.lang.Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.Object
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.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