From c42c5428122e646c304c17696ba3f356a6f58b87 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 25 Jul 2026 10:08:50 +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/Demo15.java | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 day08/src/com/inmind/math04/Demo15.java

diff --git a/day08/src/com/inmind/math04/Demo15.java b/day08/src/com/inmind/math04/Demo15.java
new file mode 100644
index 0000000..adf8083
--- /dev/null
+++ b/day08/src/com/inmind/math04/Demo15.java
@@ -0,0 +1,25 @@
+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 Demo15 {
+    public static void main(String[] args) {
+        //public static double abs(double a) ：返回 double 值的绝对值。
+        System.out.println(Math.abs(-2));
+        System.out.println(Math.abs(-2.2));
+        //public static double ceil(double a) ：返回大于等于参数的最小的整数。(向上取整)
+        System.out.println(Math.ceil(6.1));//7.0
+        System.out.println(Math.ceil(-3.6));//-3.0
+        //public static double floor(double a) ：返回小于等于参数最大的整数。（向下取整）
+        System.out.println(Math.floor(4.9));//4.0;
+        System.out.println(Math.floor(-6.6));//-7.0
+        //public static long round(double a) ：返回最接近参数的 long。(相当于四舍五入方法)
+        System.out.println(Math.round(3.4));//3
+        System.out.println(Math.round(4.6));//5
+        System.out.println(Math.round(-8.8));//
+    }
+}