更改集合表达式的传入参数

const numbers = [1, 2, 3, 4, 5];
const doubledNumbers = numbers.map(num => num * 2);
console.log(doubledNumbers); // 输出 [2, 4, 6, 8, 10]

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        List<String> strings = Arrays.asList("apple", "banana", "orange", "grape", "watermelon");
        
        List<String> filteredStrings = strings.stream()
            .map(String::toUpperCase)
            .filter(str -> str.length() >= 5)
            .collect(Collectors.toList());
        
        System.out.println(filteredStrings); // 输出 [BANANA, ORANGE, WATERMELON]
    }
}