From ce8699802575d63a24703f80c2dfda4aea89b6cb Mon Sep 17 00:00:00 2001
From: seahi <me@seahi.me>
Date: Tue, 12 Nov 2024 09:41:16 +0800
Subject: [PATCH] =?UTF-8?q?Math=E5=92=8CRandom?=
MIME-Version: 1.0
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---
 src/chapter5/Example16.java | 15 +++++++++++++++
 src/chapter5/Example17.java | 13 +++++++++++++
 src/chapter5/Example18.java | 13 +++++++++++++
 src/chapter5/Example20.java |  4 ++++
 src/chapter5/Example21.java |  4 ++++
 5 files changed, 49 insertions(+)
 create mode 100644 src/chapter5/Example16.java
 create mode 100644 src/chapter5/Example17.java
 create mode 100644 src/chapter5/Example18.java
 create mode 100644 src/chapter5/Example20.java
 create mode 100644 src/chapter5/Example21.java

diff --git a/src/chapter5/Example16.java b/src/chapter5/Example16.java
new file mode 100644
index 0000000..706f657
--- /dev/null
+++ b/src/chapter5/Example16.java
@@ -0,0 +1,15 @@
+package chapter5;
+
+public class Example16 {
+    public static void main(String[] args) {
+        System.out.println("计算绝对值的结果: " + Math.abs(-10));
+        System.out.println("求大于参数的最小整数: " + Math.ceil(5.6));
+        System.out.println("求小于参数的最大整数: " + Math.floor(-4.2));
+        System.out.println("对小数进行四舍五入后的结果: " + Math.round(-4.6));
+        System.out.println("求两个数的较大值: " + Math.max(2.1, -2.1));
+        System.out.println("求两个数的较小值: " + Math.min(2.1, -2.1));
+        System.out.println("生成一个大于等于0.0小于1.0随机值: " + Math.round(10 * Math.random()));
+        System.out.println("开平方的结果: "+Math.sqrt(4));
+        System.out.println("指数函数的值: "+Math.pow(2, 3));
+    }
+}
diff --git a/src/chapter5/Example17.java b/src/chapter5/Example17.java
new file mode 100644
index 0000000..d9586b9
--- /dev/null
+++ b/src/chapter5/Example17.java
@@ -0,0 +1,13 @@
+package chapter5;
+
+import java.util.Random;
+
+public class Example17 {
+    public static void main(String[] args) {
+        Random r = new Random();    // 不传入种子
+        for (int i = 0; i < 10; i++) {
+            // 随机产生10个[0,100)之间的整数
+            System.out.println(r.nextInt(100));
+        }
+    }
+}
diff --git a/src/chapter5/Example18.java b/src/chapter5/Example18.java
new file mode 100644
index 0000000..c009eb4
--- /dev/null
+++ b/src/chapter5/Example18.java
@@ -0,0 +1,13 @@
+package chapter5;
+
+import java.util.Random;
+
+public class Example18 {
+    public static void main(String[] args) {
+        Random r = new Random(13);
+        // 随机产生10个[0,100)之间的整数
+        for (int i = 0; i < 10; i++) {
+            System.out.println(r.nextInt(100));
+        }
+    }
+}
diff --git a/src/chapter5/Example20.java b/src/chapter5/Example20.java
new file mode 100644
index 0000000..0e8b396
--- /dev/null
+++ b/src/chapter5/Example20.java
@@ -0,0 +1,4 @@
+package chapter5;
+
+public class Example20 {
+}
diff --git a/src/chapter5/Example21.java b/src/chapter5/Example21.java
new file mode 100644
index 0000000..c58ab85
--- /dev/null
+++ b/src/chapter5/Example21.java
@@ -0,0 +1,4 @@
+package chapter5;
+
+public class Example21 {
+}