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Is there available a proven Java Pair class implementation?
I mean readily available, widely accepted and tested, maybe part of a more extensive library such as Apache Commons or Guava.
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The implementation of Pair class contains the following components: Two public fields: first and second, just like in C++. A private constructor: takes two arguments – a key and, its corresponding value. Method of(): A static factory method for creating an immutable, Typed Pair instance.
To sum it up: a generic Pair class doesn't have any special semantics and you could as well need a Tripplet class etc. The developers of Java thus didn't include a generic Pair but suggest to write special classes (which isn't that hard) like Point(x,y) , Range(start, end) or Map.
Pair class which can be used to store a pair. We need to store the values into Pair using the parameterized constructor provided by the javafx. util. Pair class.
A mutable pair consists of two object elements. MutablePair is defined in the Apache Commons Lang. The package has to be added to the classpath before MutablePair is used.
Yes, have a look at Apache Commons Pair.
Use sparingly, if at all; left and right doesn't really convey anything about the content or relation between the elements.
(The Pair class was deliberately left out of the standard Java API.)
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Map.EntryWhat about java.util.Map.Entry interface?
Two concrete implementation bundled with Java 6 and later:
java.util.AbstractMap.SimpleEntryjava.util.AbstractMap.SimpleImmutableEntry
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