chapter 4

src/chapter4/example07/Example07.java

@@ -0,0 +1,15 @@
+package chapter4.example07;
+
+final class Animal {
+    // 空
+}
+
+//class Dog extends Animal {
+//
+//}
+
+public class Example07 {
+    public static void main(String[] args) {
+//        Dog dog = new Dog();
+    }
+}