Arrays.asList 与 Arrays.stream 使用 forEach()
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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