Java 中如何使用元组 Tuple

Java 内置数据类型中是没有 Tuple 元组类型的，需要引入第三方包 vavr，它提供了最多八个元素的 Tuple 类型。

• 添加依赖

<dependency>
  <groupId>io.vavr</groupId>
  <artifactId>vavr</artifactId>
  <version>0.10.4</version>
</dependency>

• 使用示例

package org.example;

import io.vavr.Tuple;
import io.vavr.Tuple2;
import io.vavr.Tuple3;

public class Main {
    public static void main(String[] args) {
        Tuple2<Integer, Integer> tuple2 = Tuple.of(5, 6);
        Tuple3<String, Integer, Integer> tuple3 = Tuple.of("beijing", 50, 60);

        System.out.println("tuple3 = " + tuple3);
        System.out.println("tuple2 = " + tuple2);

        System.out.println("tuple2._1 = " + tuple2._1);
        System.out.println("tuple2._2() = " + tuple2._2());

    }
}