Java8，

Java8，

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

public class Test1 {
    public static void main(String[] args) {
        int[] nums = {1, 2, 3, 4};
        //先装箱然后collect算子将将结果转换为List
        List<Integer> temp = IntStream.of(nums).boxed().collect(Collectors.toList());
        for (Integer integer : temp) {
            System.out.println(integer);
        }
    }
}