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

问题描述

如果你有一个 Array 并且你想使用 Java8 的 forEach() 方法，哪种方法更好或更高效:

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);

差异是否显着或有更好的解决方案来解决这个问题?

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

推荐答案

都不是.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);

因为您将数组到流的转换留给 JDK - 让它负责效率等.

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

但是，由于您没有数组，我将使用 Stream.of() 的可变参数来创建值流:

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 负责在它认为合适的时候有效地流式传输值.

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

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