s-day01-Duration类(时间间隔)
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@@ -1,5 +1,6 @@
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package com.inmind.jdk8_date05;
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import java.time.Duration;
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import java.time.Instant;
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/**
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@@ -29,9 +30,14 @@ public class InstantDemo12 {
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// Instant对象的作用:做代码的性能分析,或者记录用户的操作时间点
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Instant start = Instant.now();
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for (int i = 0; i < 500; i++) {
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System.out.println("---------");
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}
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//代码的执行(50行代码的功能)
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Instant end = Instant.now();
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//todo 之后我们会用间隔来计算时间差!!!
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//我们会用间隔来计算时间差!!!
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Duration duration = Duration.between(start, end);
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System.out.println(duration.toNanos());
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//传统的Date类,只能精确到毫秒,并且是可变对象,而Instant可以精确到纳秒,并且不可改变对象,推荐使用Instant,但一般LocalDateTime也够用了
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}
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}
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