英文:
Does streams use Boxing and unboxing when print array of int values
问题
以下是您要翻译的内容：
如果我运行这行代码：
Arrays.stream(new int[] {2, 4, 6, 8, 10}).forEach(x -> System.out.print(x + " "));
这些值是否会发生装箱或拆箱？
英文:
if i run this line of code :
Arrays.stream(new int[] {2, 4, 6, 8, 10}).forEach(x->System.out.print(x+ " " ));
Is there any boxing or unboxign happens on the values?
答案1
得分: 2
不，这里没有发生自动装箱/拆箱。你调用了处理int[]和int的IntStream stream(int[] array)方法，没有涉及任何Integer。forEach使用了处理int的IntConsumer。而且字符串连接似乎也没有涉及装箱（https://stackoverflow.com/questions/12445064/string-concatenation-and-autoboxing-in-java），因为使用了StringBuilder.append(int)。
英文:
No, there is no auto-boxing / auto-unboxing happening. You invoke IntStream stream(int[] array) which deals with int[] and int without having any Integer involved. The forEach gets an IntConsumer which deals with int only. And the string concatenation does not appear to involve boxing either (https://stackoverflow.com/questions/12445064/string-concatenation-and-autoboxing-in-java) since StringBuilder.append(int) is used.
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