段階１です

em-oop/src/BasicCheck1.java

@@ -4,13 +4,23 @@ public class BasicCheck1 {
 	public static void main(String[] args) {
 		// TODO 自動生成されたメソッド・スタブ
 		Book book = new Book();
-		book.title= "吾輩は猫である";
+		//		book.title = "吾輩は猫である";
-		book.author="夏目漱石";
+		//		book.author = "夏目漱石";
-		book.price=800;
+		//		book.price = 800;
+		//		System.out.println(book.title);
+		//		System.out.println(book.author);
+		//		System.out.println(book.price);
+		book.title = "タイトル未設定";
+		book.author = "著者未設定";
+		book.price = 0;
+
 		System.out.println(book.title);
 		System.out.println(book.author);
 		System.out.println(book.price);
-	}
-	
 
+		Book book2 = new Book("銀河鉄道の夜","宮沢賢治",500);
+		System.out.println(book2.title);
+		System.out.println(book2.author);
+		System.out.println(book2.price);
+	}
 }

em-oop/src/Book.java

@@ -3,4 +3,13 @@ public class Book {
 	String title;
 	String author;
 	int price;
+	
+	public  Book() {
+	}
+	
+	public  Book(String title, String author, int price) {
+		this.title = title;
+		this.author = author;
+		this.price = price;
+	}
 }