Arrays.asList与Arrays.stream一起使用forEach（） [英] Arrays.asList vs. Arrays.stream to use forEach()

问题描述

如果你有一个数组而你想使用Java8 forEach（）方法，哪种方法更好或更有效：

If you have an Array and you want to use the Java8 forEach() method, which approach is better or more efficient:

Arrays.asList(new String[]{"hallo","hi"}).forEach(System.out::println);

或

Arrays.stream(new String[]{"hallo","hi"}).forEach(System.out::println);

差异是显着还是有更好的解决方案可以解决这个问题？

Is the difference significant or are there any better solutions to solve this?

推荐答案

两者都没有。如果你已经有一个数组，

Neither. If you already had an array,

String[] array;

我会使用：

Arrays.stream(array).forEach(System.out::println);

因为您将数组的转换保留为JDK的流 - 让它负责效率等等。

because you leave the conversion of the array to a stream to the JDK - let it be responsible for efficiency etc.

但是，由于你没有数组，我会使用 Stream.of（）' s varargs创建值的流：

But, since you don't have an array, I would use Stream.of()'s varargs to create a stream of the values:

Stream.of("hallo","hi").forEach(System.out::println);

这再次让JDK负责按照自己认为合适的方式有效地传输值。

Which again lets the JDK take the responsibility of efficiently streaming the values as it sees fit.

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