From 01b47fa6843e4d357f2fe53c5e4a510539896d16 Mon Sep 17 00:00:00 2001
From: m-endo <26-s-i-tm-nets@it-college.jp>
Date: Tue, 15 Sep 2026 13:22:22 +0900
Subject: [PATCH] =?UTF-8?q?Day2=E7=AC=AC=E4=B8=80=E6=AE=B5=E9=9A=8E?=
 =?UTF-8?q?=E5=AE=8C=E4=BA=86?=
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Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 em-oop/src/BasicCheck1.java | 21 ++++++++++++++-------
 em-oop/src/Book.java        | 15 +++++++++++++++
 2 files changed, 29 insertions(+), 7 deletions(-)

diff --git a/em-oop/src/BasicCheck1.java b/em-oop/src/BasicCheck1.java
index 0bf11e4..d4b6a6a 100644
--- a/em-oop/src/BasicCheck1.java
+++ b/em-oop/src/BasicCheck1.java
@@ -2,15 +2,22 @@
 public class BasicCheck1 {
 
 	public static void main(String[] args) {
-		Book book = new Book();
+		//Book book = new Book();
 		
-		book.title = "吾輩は猫である";
-		book.author = "夏目漱石";
-		book.price = 800;
+		//book.title = "吾輩は猫である";
+		//book.author = "夏目漱石";
+		//book.price = 800;
+		
+		//System.out.println(book.title);
+		//System.out.println(book.author);
+		//System.out.println(book.price);
+		
+		//引数なし
+		Book book1 = new Book();
+		
+		//引数あり
+		Book book2 = new Book("銀河鉄道の夜", "宮沢賢治", 500);
 		
-		System.out.println(book.title);
-		System.out.println(book.author);
-		System.out.println(book.price);
 	}
 
 }
diff --git a/em-oop/src/Book.java b/em-oop/src/Book.java
index 418f4a3..7a57ee9 100644
--- a/em-oop/src/Book.java
+++ b/em-oop/src/Book.java
@@ -3,4 +3,19 @@ public class Book {
 	String title;
 	String author;
 	int price;
+	
+	//コンストラクタ生成
+	public Book() {
+		System.out.println( "タイトル未設定");
+		System.out.println( "著者未設定"); 
+		System.out.println( "0"); 
+	}
+	//3つの引数を持つコンストラクタ生成
+	public Book(String title, String author, int price) {
+		System.out.println(this.title = title);
+		System.out.println(this.author = author);
+		System.out.println(this.price = price);
+		
+	}
+	
 }