From f0dd07044848a591a04d151a8c13d2fc96f6864d Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Tue, 22 Sep 2026 16:17:49 +0800
Subject: [PATCH] =?UTF-8?q?day08--static=E5=BA=94=E7=94=A8-Math-=E6=93=8D?=
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---
 day08/src/com/inmind/math04/MathDemo11.java | 22 +++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 day08/src/com/inmind/math04/MathDemo11.java

diff --git a/day08/src/com/inmind/math04/MathDemo11.java b/day08/src/com/inmind/math04/MathDemo11.java
new file mode 100644
index 0000000..f472da6
--- /dev/null
+++ b/day08/src/com/inmind/math04/MathDemo11.java
@@ -0,0 +1,22 @@
+package com.inmind.math04;
+/*
+Math工具类的使用
+public static double abs(double a) ：返回 double 值的绝对值。
+public static double ceil(double a) ：返回大于等于参数的最小的整数。
+public static double floor(double a) ：返回小于等于参数最大的整数。
+public static long round(double a) ：返回最接近参数的 long。(相当于四舍五入方法)
+ */
+public class MathDemo11 {
+    public static void main(String[] args) {
+
+        //获取绝对值
+        System.out.println(Math.abs(-100));//100
+        //向上取整
+        System.out.println(Math.ceil(-3.7));//-3.0
+        //向下取整
+        System.out.println(Math.floor(-3.4));//-4.0
+        //四舍五入
+        System.out.println(Math.round(4.4));//4
+        System.out.println(Math.round(4.5));//5
+    }
+}