Duration和Period

src/chapter5/Example24.java

@@ -1,4 +1,20 @@
 package chapter5;
 
+import java.time.Duration;
+import java.time.LocalTime;
+
 public class Example24 {
+    public static void main(String[] args) {
+        LocalTime start = LocalTime.now();
+        LocalTime end = LocalTime.of(21, 53, 0);
+
+        Duration duration = Duration.between(start, end);
+
+        System.out.println("时间间隔（纳秒）" + duration.toNanos());
+        System.out.println("时间间隔（毫秒）" + duration.toMillis());
+        System.out.println("时间间隔（秒）" + duration.toSeconds());
+        System.out.println("时间间隔（分钟）" + duration.toMinutes());
+        System.out.println("时间间隔（小时）" + duration.toHours());
+
+    }
 }

src/chapter5/Example25.java

@@ -1,4 +1,16 @@
 package chapter5;
 
+import java.time.LocalDate;
+import java.time.Period;
+
 public class Example25 {
+    public static void main(String[] args) {
+        LocalDate birthday = LocalDate.of(2018, 12, 12);
+        LocalDate now = LocalDate.of(2020, 11, 13);
+
+        Period period = Period.between(birthday, now);
+        System.out.println("时间间隔（年）" + period.getYears());
+        System.out.println("时间间隔（月）" + period.getMonths());
+        System.out.println("时间间隔（天）" + period.getDays());
+    }
 }