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); }}
The output result of running the above code is:
[A, D, M, O, X] 元素索引值为 : 1
The above is the Java example - Get the content of the index value of the vector element. For more related content, please pay attention to the PHP Chinese website (www.php.cn)!