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📜  JavaTuples-配对类

📅  最后修改于: 2020-11-15 03:27:22             🧑  作者: Mango

介绍

org.javatuples.Pair类表示具有两个元素的元组。

类声明

以下是org.javatuples.Pair类的声明-

public final class Pair
   extends Tuple
      implements IValue0, IValue1

类构造器

Sr.No. Constructor & Description
1

Pair(A value0, B value1)

This creates a Pair Tuple.

类方法

Similarly setAt1() set the value at index 1.

Sr.No. Method & Description
1

Triplet add(Unit tuple)

This method returns a Triplet tuple.

Similarly other methods to add tuples are available e.g. add(Pair tuple) returns Quartet and upto add(Octet tuple) returns Decade tuple.
2

Triplet add(X0 value)

This method add a value to the tuple and returns a Triplet tuple.

Similarly other methods to add values are available e.g. add(X0 value0, X1 value1) returns Quartet and so on upto add() with eight parameters.
3

Triplet addAt0(Unit value)

This method add a Unit tuple at index 0 and returns a Triplet tuple.

Similarly other methods to add tuples are available e.g. addAt0(Pair value) returns Quartet and so on upto addAt0(Octet). Other similar method are addAt1(Unit value) which add a unit at index0 and have similar methods upto addAt2(Octet).
4

Triplet addAt0(X0 value)

This method add a value at index 0 and returns a Triplet tuple.

Similarly other methods to add values are available e.g. addAt0(X0 value0, X1 value1) returns Quartet and so on upto addAt0() with eight parameters. Other similar method are addAt1(X0 value) which add a value at index0 and have similar methods upto addAt2() with eight parameters.
5

static Pair fromArray(X[] array)

Create tuple from array.
6

static Pair fromCollection(Collection collection)

Create tuple from collection.
7

static Pair fromIterable(Iterable iterable)

Create tuple from iterable.
8

static Pair fromIterable(Iterable 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() returns the value at index 1.
11

Unit removeFrom0()

Return the tuple after removing value of the tuple at index 0.

Similarly removeFrom1() returns the tuple after removing value of the tuple at index 1.
12

Pair setAt0(X value)

Set the value of the tuple at index 0.
13

static Pair with(A value0, B value1)

Create the tuple using given value.

方法继承

此类从以下类继承方法-

  • org.javatuples.Tuple

  • 目的

例

让我们看一下配对类的实际应用。在这里，我们将看到如何使用各种方法。

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

文件：TupleTester.java

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

public class TupleTester {
   public static void main(String args[]){
      Pair pair = Pair.with(5,6);
      System.out.println(pair);
      boolean isPresent = pair.contains(5);
      System.out.println("5 is present: " + isPresent);
      List list = new ArrayList<>();
      list.add(1);
      list.add(2);
      Triplet triplet = pair.add("Test");
      System.out.println(triplet);
      Integer value = pair.getValue0();
      System.out.println(value);
      Unit unit = pair.removeFrom0();
      System.out.println(unit);
      Pair pair1 = Pair.fromCollection(list);   
      System.out.println(pair1);
   }
}

验证结果

使用javac编译器编译类，如下所示：

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

现在运行TupleTester以查看结果-

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

输出

验证输出

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