Tuple2 (vespajlib 7.529.2 API)

java.lang.Object
- com.yahoo.collections.Tuple2<T1,T2>

```
public final class Tuple2<T1,T2>
extends Object
```
A pair of values. This class is to avoid littering a class with thin wrapper objects for passing around e.g. the state of an operation and the result value. Using this class may be correct, but it is a symptom that you may want to redesign your code. (Should you pass mutable objects to the method instead? Create a new class and do the work inside that class instead? Etc.)

Author:

Steinar Knutsen

Field Summary

Fields
Modifier and Type Field Description

T1 first

T2 second

Constructor Summary

Constructors
Constructor Description

Tuple2(T1 first, T2 second)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(Object obj)`	equals(Object) will always throw UnsupportedOperationException.
`int`	`hashCode()`	hashCode() will always throw UnsupportedOperationException.
`String`	`toString()`	Human readable string representation which invokes the contained instances' toString() implementation.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - first
```
public final T1 first
```
  - second
```
public final T2 second
```
- Constructor Detail
  - Tuple2
```
public Tuple2(T1 first,
              T2 second)
```
- Method Detail
  - hashCode
```
public int hashCode()
```
    hashCode() will always throw UnsupportedOperationException. The reason is this class is not meant for being put in Container implementation or similar use where Java generics will lead to a type unsafe maintenance nightmare.
    
    Overrides:
    
    hashCode in class Object
    
    Throws:
    
    UnsupportedOperationException - will always throw this when invoked
  - equals
```
public boolean equals(Object obj)
```
    equals(Object) will always throw UnsupportedOperationException. The intention is always using the objects contained in the tuple directly.
    
    Overrides:
    
    equals in class Object
    
    Parameters:
    
    obj - ignored
    
    Throws:
    
    UnsupportedOperationException - will always throw this when invoked
  - toString
```
public String toString()
```
    Human readable string representation which invokes the contained instances' toString() implementation.
    
    Overrides:
    
    toString in class Object