java oop : 상속

JavaOOP/src/Java02.java

@@ -1,4 +1,4 @@
-import object.Book;
+import myObject.Book;
 
 public class Java02 {
     public static void main(String[] args) {

JavaOOP/src/Java03.java

@@ -1,5 +1,5 @@
-import object.Book;
-import object.Person;
+import myObject.Book;
+import myObject.Person;
 
 public class Java03 {
 

JavaOOP/src/Java10.java

@@ -1,4 +1,4 @@
-import object.BookVO;
+import myObject.BookVO;
 
 public class Java10 {
     public static void main(String[] args) {

JavaOOP/src/Java11.java

@@ -1,4 +1,4 @@
-import object.BookVO;
+import myObject.BookVO;
 
 public class Java11 {
 

JavaOOP/src/Java12.java

@@ -1,4 +1,4 @@
-import object.PrivateConstructor;
+import myObject.PrivateConstructor;
 
 public class Java12 {
 

JavaOOP/src/Java13.java

@@ -1,4 +1,4 @@
-import object.BookDTO;
+import myObject.BookDTO;
 
 public class Java13 {
     public static void main(String[] args) {

JavaOOP/src/Java14.java

@@ -1,4 +1,4 @@
-import object.MemberVO;
+import myObject.MemberVO;
 
 public class Java14 {
 

JavaOOP/src/Java15.java

@@ -1,4 +1,4 @@
-import object.MemberVO;
+import myObject.MemberVO;
 
 public class Java15 {
     public static void main(String[] args) {

JavaOOP/src/Java16.java

@@ -1,4 +1,4 @@
-import object.OverLoad;
+import myObject.OverLoad;
 
 public class Java16 {
     public static void main(String[] args) {

JavaOOP/src/Java17.java

@@ -1,6 +1,6 @@
 import com.google.gson.Gson;
-import object.BookVO;
-import object.MyUtil;
+import myObject.BookVO;
+import myObject.MyUtil;
 
 public class Java17 {
     public static void main(String[] args) {

JavaOOP/src/Java18.java

@@ -0,0 +1,17 @@
+import myObject.Animal;
+import myObject.Cat;
+import myObject.Dog;
+
+public class Java18 {
+    public static void main(String[] args) {
+
+//        Dog dog = new Dog();
+//        Cat cat = new Cat();
+
+        Animal dog = new Dog();
+        Animal cat = new Cat();
+
+        dog.eat();
+        cat.eat();
+    }
+}

JavaOOP/src/myObject/Animal.java

@@ -0,0 +1,7 @@
+package myObject;
+
+public class Animal {
+    public void eat() {
+        System.out.println("냠냠");
+    }
+}

JavaOOP/src/myObject/Book.java

@@ -1,4 +1,4 @@
-package object;
+package myObject;
 
 public class Book {
     public String title;

JavaOOP/src/myObject/BookDTO.java

@@ -1,4 +1,4 @@
-package object;
+package myObject;
 
 public class BookDTO {
     public String title;

JavaOOP/src/myObject/BookVO.java

@@ -1,4 +1,4 @@
-package object;
+package myObject;
 
 public class BookVO {
     public String title;

JavaOOP/src/myObject/Cat.java

@@ -0,0 +1,4 @@
+package myObject;
+
+public class Cat extends Animal{
+}

JavaOOP/src/myObject/Dog.java

@@ -0,0 +1,4 @@
+package myObject;
+
+public class Dog extends Animal{
+}

JavaOOP/src/myObject/MemberVO.java

@@ -1,4 +1,4 @@
-package object;
+package myObject;
 
 public class MemberVO {
     private String name;

JavaOOP/src/myObject/MyUtil.java

@@ -1,4 +1,4 @@
-package object;
+package myObject;
 
 public class MyUtil {
     public int hap() {

JavaOOP/src/myObject/OverLoad.java

@@ -1,4 +1,4 @@
-package object;
+package myObject;
 
 public class OverLoad {
     // 동작(method)으로만 이루어진 객체

JavaOOP/src/myObject/Person.java

@@ -1,4 +1,4 @@
-package object;
+package myObject;
 
 public class Person {
     public String name;

JavaOOP/src/myObject/PrivateConstructor.java

@@ -1,4 +1,4 @@
-package object;
+package myObject;
 
 public class PrivateConstructor {