java8时间搓计算代码运行时间

Instant start = Instant.now();

// XXXXXXXX（你的代码）

Instant end = Instant.now();
//时间搓对象
 Duration timeElapsed = Duration.between(start, end);

//不同格式展示，下面是分钟和秒的样子，还有小时天这些           
long l = timeElapsed.toMinutes();
long ls = timeElapsed.toMillis();
System.out.println("l = " + l);
System.out.println("ls = " + ls);