使用IntStream而不是streams迭代两个列表

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

public class IntStreamExample {
    public static void main(String[] args) {
        List<Integer> list1 = Arrays.asList(1, 2, 3, 4, 5);
        List<Integer> list2 = Arrays.asList(6, 7, 8, 9, 10);

        // 将两个列表转换为 IntStream
        IntStream stream1 = list1.stream().mapToInt(Integer::intValue);
        IntStream stream2 = list2.stream().mapToInt(Integer::intValue);

        // 合并两个 IntStream
        IntStream combinedStream = IntStream.concat(stream1, stream2);

        // 计算总和
        int sum = combinedStream.sum();
        System.out.println("Sum: " + sum);

        // 过滤出大于 5 的数
        IntStream filteredStream = combinedStream.filter(x -> x > 5);
        System.out.println("Filtered numbers: " + filteredStream.boxed().toList());
    }
}

List<Integer> list = Arrays.asList(1, 2, 3, 4, 5);
IntStream intStream = list.stream().mapToInt(Integer::intValue);

IntStream intStream = IntStream.of(1, 2, 3, 4, 5);
List<Integer> list = intStream.boxed().collect(Collectors.toList());