如何将String值转换为InputStreamReader？
考虑以下代码：
List<String> myList = Arrays.asList(1, 2, 3);
String[] myArray1 = myList.toArray(new String[myList.size()]);
String[] myArray2 = myList.stream().toArray(String[]::new);
assert Arrays.equals(myArray1, myArray2);
在我看来，使用流要简单得多。
因此，我测试了每个的速度。
List<String> myList = Arrays.asList("1", "2", "3");
double start;
start = System.currentTimeMillis();
for (int i = 0; i < 10_000_000; i++) {
String[] myArray1 = myList.toArray(new String[myList.size()]);
assert myArray1.length == 3;
}
System.out.println(System.currentTimeMillis() - start);
start = System.currentTimeMillis();
for (int i = 0; i < 10_000_000; i++) {
String[] myArray2 = myList.stream().toArray(String[]::new);
assert myArray2.length == 3;
}
System.out.println(System.currentTimeMillis() - start); …