List<Integer> nums = Arrays.asList(1,2,3,4,5,6);
long result = nums
.stream()
.peek(System.out::print)
.map(n->n*n)
.filter(n->n>20)
.peek(System.out::print)
.count();
System.out.println(result);
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为什么不打印12345625362而不是打印1234525362?