Javatuples 简明教程

JavaTuples - Triplet Class

Introduction

org.javatuples.Triplet 类表示包含三个元素的元组。

The org.javatuples.Triplet class represents a Tuple with three elements.

Class Declaration

以下是 org.javatuples.Triplet 类的声明 -

Following is the declaration for org.javatuples.Triplet class −

public final class Triplet<A,B,C>
   extends Tuple
      implements IValue0<A>, IValue1<B>, IValue2<C>

Class Constructors

Sr.No.

Constructor & Description

Triplet(A value0, B value1, C value2) This creates a Triplet Tuple.

Class Methods

Sr.No.	Method & Description
1	Quartet add(Unit tuple) This method returns a Quartet tuple. Similarly other methods to add tuples are available e.g. add(Pair tuple) returns Quintet and upto add(Septet tuple) returns Decade tuple.
2	Quartet add(X0 value) This method add a value to the tuple and returns a Quartet tuple. Similarly other methods to add values are available e.g. add(X0 value0, X1 value1) returns Quintet and so on upto add() with seven parameters.
3	Quartet addAt0(Unit value) This method add a Unit tuple at index 0 and returns a Quartet tuple. Similarly other methods to add tuples are available e.g. addAt0(Pair value) returns Quintet and so on upto addAt0(Septet). Other similar method are addAt1(Unit value) which add a unit at index0 and have similar methods upto addAt2(Septet).
4	Quartet addAt0(X0 value) This method add a value at index 0 and returns a Quartet tuple. Similarly other methods to add values are available e.g. addAt0(X0 value0, X1 value1) returns Quintet and so on upto addAt0() with seven parameters. Other similar method are addAt1(X0 value) which add a value at index0 and have similar methods upto addAt2() with seven parameters.
5	static <X> Triplet<X,X,X> fromArray(X[] array) Create tuple from array.
6	static <X> Triplet<X,X,X> fromCollection(Collection<X> collection) Create tuple from collection.
7	static <X> Triplet<X,X,X> fromIterable(Iterable<X> iterable) Create tuple from iterable.
8	static <X> Triplet<X,X,X> fromIterable(Iterable<X> iterable, int index) Create tuple from iterable, starting from the specified index.
9	int getSize() Return the size of the tuple.
10	A getValue0() Returns the value of the tuple at index 0. Similarly getValue1() upto getValue2() returns the value at index 1 and so on.
11	Pair<B,C> removeFrom0() Return the tuple after removing value of the tuple at index 0. Similarly removeFrom1() upto removeFrom2() returns the tuple after removing value of the tuple at index 1 and so on.
12	<X> Triplet<X,B,C> setAt0(X value) Set the value of the tuple at index 0.
13	static <A> Triplet<A,B,C> with(A value0, B value1, C value2) Create the tuple using given value.

Methods inherite

此类从以下类中继承方法：

This class inherits methods from the following classes −

org.javatuples.Tuple
Object

Example

让我们看看 Triplet 类的实际应用。我们将在其中了解如何使用各种方法。

Let’s see Triplet Class in action. Here we’ll see how to use various methods.

在 C:>JavaTuples 中创建一个名为 TupleTester 的 Java 类文件。

Create a java class file named TupleTester in C:\>JavaTuples.

文件：TupleTester.java

File: TupleTester.java

package com.tutorialspoint;
import java.util.ArrayList;
import java.util.List;
import org.javatuples.Pair;
import org.javatuples.Quartet;
import org.javatuples.Triplet;

public class TupleTester {
   public static void main(String args[]){
      Triplet<Integer, Integer, Integer> triplet = Triplet.with(5, 6, 7);
      System.out.println(triplet);
      boolean isPresent = triplet.contains(5);
      System.out.println("5 is present: " + isPresent);
      List<Integer> list = new ArrayList<>();
      list.add(1);
      list.add(2);
      list.add(3);
      Quartet<Integer, Integer, Integer, String> quartet = triplet.add("Test");
      System.out.println(quartet);
      Integer value = triplet.getValue0();
      System.out.println(value);
      Pair<Integer, Integer> pair = triplet.removeFrom0();
      System.out.println(pair);
      Triplet<Integer, Integer, Integer> triplet1 =
         Triplet.fromCollection(list);
      System.out.println(triplet1);
   }
}

Verify the result

使用以下 javac 编译器编译类：

Compile the classes using javac compiler as follows −

C:\JavaTuples>javac -cp javatuples-1.2.jar ./com/tutorialspoint/TupleTester.java

现在运行 TupleTester 查看结果：

Now run the TupleTester to see the result −

C:\JavaTuples>java  -cp .;javatuples-1.2.jar com.tutorialspoint.TupleTester

Output

验证输出

Verify the Output

[5, 6, 7]
5 is present: true
[5, 6, 7, Test]
5
[6, 7]
[1, 2, 3]