可以用stream.of来合并两个流

public class Test7concat {
    public static void main(String[] args) {
        /*
            Stream流:
                static <T> Stream<T> concat(Stream<? extends T> a, Stream<? extends T> b);合并2个流中的元素
         */
        Stream<String> stream1 = Stream.of("jack", "rose");
        Stream<String> stream2 = Stream.of("18", "19");
        // 合并
        Stream.concat(stream1,stream2).forEach(str-> System.out.println(str));
    }
}