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Java Example - Get the index value of a vector element

黄舟

Release： 2017-01-22 16:25:17

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The following example demonstrates using the sort() method of the Collections class to sort vectors and using the binarySearch() method to obtain the index value of the vector element:

/*
 author by w3cschool.cc
 Main.java
 */import java.util.Collections;import java.util.Vector;public class Main {
   public static void main(String[] args) {
      Vector v = new Vector();
      v.add("X");
      v.add("M");
      v.add("D");
      v.add("A");
      v.add("O");
      Collections.sort(v);
      System.out.println(v);
      int index = Collections.binarySearch(v, "D");
      System.out.println("元素索引值为 : " + index);
   }}

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The output result of running the above code is:

[A, D, M, O, X]
元素索引值为 : 1

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Related labels：

Java，向量元素，索引值

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