使用流报错:stream has already been operated upon or closed

public class StreamTest {public static void main(String[] args) {//生成一个String类型的Stream流Stream<String> stringStream = Stream.of("1", "2", "3", "4", "5");// 用map方法将stream中string类型转换成int类型stringStream.map((String s) ->{return Integer.parseInt(s);});stringStream.forEach(i -> System.out.println(i));}
}

如图，代码运行报错：

流已经被使用或者关闭

这是流的一个特性：一个流只能被使用一次！

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使用流报错:stream has already been operated upon or closed

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