From 81c823ec36d64d4407fcb3c899883f3f501334f8 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Tue, 13 Oct 2026 10:14:15 +0800
Subject: [PATCH] =?UTF-8?q?s-day01--Instant=E7=B1=BB=20=EF=BC=88=E4=BB=A3?=
 =?UTF-8?q?=E6=9B=BFDate=EF=BC=89?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../com/inmind/jdk8_time04/InstantDemo11.java | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 s-day01/src/com/inmind/jdk8_time04/InstantDemo11.java

diff --git a/s-day01/src/com/inmind/jdk8_time04/InstantDemo11.java b/s-day01/src/com/inmind/jdk8_time04/InstantDemo11.java
new file mode 100644
index 0000000..bdfaca3
--- /dev/null
+++ b/s-day01/src/com/inmind/jdk8_time04/InstantDemo11.java
@@ -0,0 +1,36 @@
+package com.inmind.jdk8_time04;
+
+import java.time.Instant;
+
+/**
+ * 目标：掌握Instant的使用。
+ */
+public class InstantDemo11 {
+    public static void main(String[] args) {
+        //1.创建时间戳对象
+        Instant now = Instant.now();
+
+        //2.获取总秒数（计算机基准时间开始算的）
+        long epochSecond = now.getEpochSecond();
+        System.out.println(epochSecond);
+        //3.不够1秒的纳秒值
+        System.out.println(now.getNano());
+        //4.打印对象：总秒数+纳秒数
+        System.out.println(now);//重写toString
+        //5.对时间点的加减
+        Instant instant1 = now.plusSeconds(60);
+        Instant instant2 = now.minusSeconds(60);
+        System.out.println(instant1);
+        System.out.println(instant2);
+        //6.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
+        Instant start = Instant.now();
+        //业务代码的执行....
+        for (int i = 0; i < 100; i++) {
+            System.out.println(1);
+        }
+        Instant end = Instant.now();
+        //todo 之后使用间隔来计算时间的差
+
+        //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
+    }
+}