2日目＿段階1＿完了

em-oop/src/BasicCheck1.java

@@ -3,17 +3,22 @@ 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.author ="夏目漱石";
-		book.price = 800;
+//		Book book = new Book();
+//		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);
+		Book book1 = new Book();
 		
+		System.out.println(book1.title);
+		System.out.println(book1.author);
+		System.out.println(book1.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/BasicCheck2.java

@@ -1,11 +1,11 @@
 
 public class BasicCheck2 {
 	public static void main(String[] args) {
-		Student student = new Student(1,"鈴木一郎");
-		
+		Student student = new Student();
+//		
 		student.studentId = 1;
 		student.name = "鈴木一郎";
-		
+//		
 //		System.out.print("学籍番号"+student.studentId);
 //		System.out.print("名前:" + student.name);
 		student.printProfile();

em-oop/src/BasicCheck3.java

@@ -0,0 +1,8 @@
+
+public class BasicCheck3 {
+	public static void main() {
+		Item[] items = new Item[3];
+		
+	}
+
+}

em-oop/src/Book.java

@@ -1,7 +1,24 @@
 
 public class Book {
-	String title;
-	String author;
-	int price;
+	public String title;
+	public String author;
+	public int price;
+	
+	//引数なしコンストラクタ
+	public Book() {
+		this.title = "タイトル未設定";
+		this.author = "著者未設定";
+		this.price = 0;
+		
+//		System.out.println("コンストラクタが呼び出されました");
+		
+	}
+	//引数ありコンストラクタ
+	public Book(String title, String author, int price) {
+//		System.out.println("引数なしのコンストラクタが呼び出されました");
+		this.title = title;
+		this.author = author;
+		this.price = price;
+	}
 
 }

em-oop/src/Item.java

@@ -0,0 +1,11 @@
+
+public class Item {
+	String name;
+	int price;
+	int stock;
+	
+	public  void sell(int amount) {
+	    this.stock = this.stock - amount;
+	}
+
+}

em-oop/src/Student.java

@@ -1,22 +1,22 @@
 
 public class Student {
+	
 	int studentId;
 	String name;
 	
-	public Student(int studentId, String name) {
-		this.studentId = studentId;
-		this.name = name;
-	}
+//	public Student(int studentId, String name) {
+//		this.studentId = studentId;
+//		this.name;
 	
-	public void printProfile() {
+		void printProfile() {
 		System.out.println("学籍番号:" + this.studentId + " 名前:" + this.name);
 	}
-	public static void main(String[] args) {
-		Student s = new Student(1,"鈴木一郎");
-		s.printProfile();
-		
+//	public static void main(String[] args) {
+//		Student s = new Student(1,"鈴木一郎");
+//		s.printProfile();
+//		
 	}
 	
 
-}
+