共计 168 个字符，预计需要花费 1 分钟才能阅读完成。
Instant before = Instant.now();
/*
do something
*/
Instant after = Instant.now();
Duration duration = Duration.between(start, end);
System.out.println("time =" + duration.toMillis() + "ms");正文完
共计 168 个字符，预计需要花费 1 分钟才能阅读完成。
Instant before = Instant.now();
/*
do something
*/
Instant after = Instant.now();
Duration duration = Duration.between(start, end);
System.out.println("time =" + duration.toMillis() + "ms");