段階３完了しました。

em-oop/src/BasicCheck3.java

@@ -0,0 +1,28 @@
+
+public class BasicCheck3 {
+
+	public static void main(String[] args) {
+		// 配列
+		Item[] items = new Item[3];
+		items[0] = new Item();
+		items[1] = new Item();
+		items[2] = new Item();
+		//items[0]代入
+		items[0].name = "ノート";
+		items[0].price = 120;
+		items[0].stock = 50;
+		//items[1]代入
+		items[1].name = "消しゴム";
+		items[1].price = 80;
+		items[1].stock = 30;
+		//items[2]代入
+		items[2].name = "鉛筆";
+		items[2].price = 60;
+		items[2].stock = 100;
+		for (int i=0; i<=2; i++) {
+			items[i].sell(5);
+			System.out.println(items[i].name +  items[i].price+"円"+ "残り"+ items[i].stock + "個");
+		}
+
+	}
+}

em-oop/src/Item.java

@@ -0,0 +1,9 @@
+
+public class Item {
+	String name;
+	int price;
+	int stock;
+	void sell(int amount) {
+		this.stock = this.stock - amount;
+	}
+}