3段階目（複数のインスタンスを扱ってみよう）

em-oop/src/BasicCheck1.java

@@ -3,7 +3,13 @@ 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;
+		System.out.println(book.title);
+		System.out.println(book.author);
+		System.out.println(book.price);
 	}
 
 }

em-oop/src/BasicCheck2.java

@@ -0,0 +1,12 @@
+
+public class BasicCheck2 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		Student student = new Student();
+		student.studentId = 1;
+		student.name = "鈴木一郎";
+		student.printProfile();
+	}
+
+}

em-oop/src/BasicCheck3.java

@@ -0,0 +1,26 @@
+
+public class BasicCheck3 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		Item[] items = new Item[3];
+		for (int i = 0; i < items.length; i++) {
+			items[i] = new Item();
+		}
+		items[0].name = "ノート";
+		items[0].price = 120;
+		items[0].stock = 50;
+		items[1].name = "消しゴム";
+		items[1].price = 80;
+		items[1].stock = 30;
+		items[2].name = "鉛筆";
+		items[2].price = 60;
+		items[2].stock = 100;
+
+		for (Item i : items) {
+			i.sell(5);
+			System.out.println(i.name + " " + i.price + "円　残り" + i.stock + "個　合計金額" + i.totalPrice() + "円");
+		}
+	}
+
+}

em-oop/src/Book.java

@@ -1,4 +1,6 @@
 
 public class Book {
-
+	String title;
+	String author;
+	int price;
 }

em-oop/src/Item.java

@@ -0,0 +1,14 @@
+
+public class Item {
+	String name;
+	int price;
+	int stock;
+
+	void sell(int amount) {
+		this.stock -= amount;
+	}
+
+	int totalPrice() {
+		return this.price * this.stock;
+	}
+}

em-oop/src/Student.java

@@ -0,0 +1,9 @@
+
+public class Student {
+	int studentId;
+	String name;
+
+	void printProfile() {
+		System.out.println("学籍番号:" + this.studentId + " 名前:" + this.name);
+	}
+}