src/chapter5/Example16.java

@@ -1,15 +0,0 @@
-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));
-    }
-}

src/chapter5/Example17.java

@@ -1,13 +0,0 @@
-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));
-        }
-    }
-}

src/chapter5/Example18.java

@@ -1,13 +0,0 @@
-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));
-        }
-    }
-}

src/chapter5/Example20.java

@@ -1,4 +0,0 @@
-package chapter5;
-
-public class Example20 {
-}

src/chapter5/Example21.java

@@ -1,24 +0,0 @@
-package chapter5;
-
-import java.time.LocalDate;
-
-public class Example21 {
-    public static void main(String[] args) {
-        LocalDate now = LocalDate.now();
-        LocalDate of = LocalDate.of(2015, 12, 12);
-
-        System.out.println("今年是" + now.getYear() + "年");
-        System.out.println("月份：" + now.getMonth());
-        System.out.println("月份：" + now.getMonthValue());
-        System.out.println("日期：" + now.getDayOfMonth());
-        System.out.println("今年中的第几天：" + now.getDayOfYear());
-        System.out.println("周几：" + now.getDayOfWeek());
-
-        System.out.println("====判断相关的方法====");
-
-        System.out.println("of是否在now之前？" + of.isBefore(now));
-        System.out.println("of是否在now之后？" + of.isAfter(now));
-        System.out.println("of和now是否相等？" + of.isEqual(now));
-        System.out.println("of是否闰年？" + of.isLeapYear());
-    }
-}