stream has already been operated upon or closed

stream has already been operated upon or closed
 

Exception in thread "main" java.lang.IllegalStateException: stream has already been operated upon or closed
	at java.util.stream.AbstractPipeline.(AbstractPipeline.java:203)
	at java.util.stream.IntPipeline.(IntPipeline.java:91)
	at java.util.stream.IntPipeline$StatefulOp.(IntPipeline.java:619)
	at java.util.stream.SliceOps$2.(SliceOps.java:236)
	at java.util.stream.SliceOps.makeInt(SliceOps.java:236)
	at java.util.stream.IntPipeline.limit(IntPipeline.java:375)
	at com.jcroad.j8.Streams.main(Streams.java:99)

代码：

//下面代码，功能是生成100个随机数。数字在0到100之间
Random random = new Random();
IntStream intStream = random.ints(0, 100);
IntStream limit = intStream.limit(100);
Stream boxed = intStream.limit(100).boxed();
List collect2 = boxed.collect(Collectors.toList());
Stream stream = tasks.stream();

这行代码报错：

Stream boxed = intStream.limit(100).boxed();

原因：

一个 Stream 只可以使用一次