Java Decade Tuple 的 contains() 方法


contains() 方法用於在 Decade Tuple 中搜索一個值。讓我們首先了解一下,使用 JavaTuples 需要做哪些準備。要使用 JavaTuples 中的 Decade 類,需要匯入以下包

import org.javatuples.Decade;

注意下載 JavaTuples jar 庫以執行 JavaTuples 程式。如果你使用的是 Eclipse IDE,則右鍵單擊專案->屬性->Java 構建路徑->新增外部 jar,然後上傳下載的 JavaTuples jar 檔案。參閱下面的指南,瞭解執行 JavaTuples 所需的所有步驟

步驟: 如何在 Eclipse 中執行 JavaTuples 程式

下面是一個示例,演示如何實現 Java Decade Tuple 的 contains() 方法

示例

import org.javatuples.Decade;
public class Demo {
   public static void main(String[] args) {
      // Tuple with 10 elements
      Decade<String, String, String, String, String, String, String, String, String, String> d =
         Decade.with("AB","CD", "EF","GH", "IJ","KL", "MN","OP", "QR", "ST");
      System.out.println("Elements in the Decade Tuple = "+d);
      boolean res1 = d.contains("MN");
      System.out.println("Does the value exist in the Decade Tuple? = "+res1);
      boolean res2 = d.contains("YZ");
      System.out.println("Does the value exist in the Decade Tuple? = "+res2);
      boolean res3 = d.contains("QR");
      System.out.println("Does the value exist in the Decade Tuple? = "+res3);
   }
}

輸出

Elements in the Decade Tuple = [AB, CD, EF, GH, IJ, KL, MN, OP, QR, ST]
Does the value exist in the Decade Tuple? = true
Does the value exist in the Decade Tuple? = false
Does the value exist in the Decade Tuple? = true

最後更新: 30-Jul-2019

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