编辑器
import java.util.*; public class Main { public static void main(String[] args) { ArrayList<String> fruits = new ArrayList<>(); fruits.add("Apple"); fruits.add("Banana"); fruits.add("Orange"); fruits.add("Banana"); fruits.add("Mango"); int count = Collections.frequency(fruits, "Banana"); System.out.println("Banana appears: " + count + " times"); } }
Banana appears: 2 times
编辑器