如何使用java计算数组中的唯一元素?
接口Set不允许重复元素,因此,创建一个set对象并尝试使用该add()方法将每个元素添加到它,以防元素重复,此方法返回false-
如果您尝试将数组的所有元素添加到Set,它只接受唯一元素-
示例
import java.util.Arrays; import java.util.HashSet; import java.util.Scanner; import java.util.Set; public class CountingUniqueElements { public static void main(String args[]) { Scanner sc = new Scanner(System.in); System.out.println("Enter the size of the array that is to be created ::"); int size = sc.nextInt(); int count = 0; int[] myArray = new int[size]; System.out.println("Enter the elements of the array ::"); for(int i = 0; i输出结果 Enter the size of the array that is to be created :: 6 Enter the elements of the array :: 45 45 45 69 32 69 The array created is :: [45, 45, 45, 69, 32, 69] indices of duplicate elements in the array are elements :: Index :: 0 Element :: 45 Index :: 3 Element :: 69 Index :: 4 Element :: 32