From cb4af2e42390041cc9a47c791e8806a069179281 Mon Sep 17 00:00:00 2001
From: toychip <dlawnsgud427@naver.com>
Date: Mon, 5 Feb 2024 16:19:53 +0900
Subject: [PATCH] =?UTF-8?q?[Week3][Chap10]=20=EB=8B=A4=ED=98=95=EC=84=B1?=
 =?UTF-8?q?=EA=B3=BC=20=EC=BA=90=EC=8A=A4=ED=8C=85=20(#26)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../main/java/week3/poly/basic/CastingMain1.java"  | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 "\354\236\204\354\244\200\355\230\225/java-basic/src/main/java/week3/poly/basic/CastingMain1.java"

diff --git "a/\354\236\204\354\244\200\355\230\225/java-basic/src/main/java/week3/poly/basic/CastingMain1.java" "b/\354\236\204\354\244\200\355\230\225/java-basic/src/main/java/week3/poly/basic/CastingMain1.java"
new file mode 100644
index 0000000..6c0ed95
--- /dev/null
+++ "b/\354\236\204\354\244\200\355\230\225/java-basic/src/main/java/week3/poly/basic/CastingMain1.java"
@@ -0,0 +1,14 @@
+package week3.poly.basic;
+
+public class CastingMain1 {
+    public static void main(String[] args) {
+        // 부모 변수가 자식 인스턴스 참조(다형적 참조)
+        Parent poly = new Child(); // x001
+        // 단 자식의 기능은 호출할 수 없다.
+        // poly.childMethod() // compile error!!
+
+        // 다운 캐스팅(부모 타입 -> 자식 타입)
+        Child child = (Child) poly; // x001
+        child.childMethod();
+    }
+}