3日目3段階目完了しました。

em-oop/src/BasicCheck1.java

@@ -4,6 +4,14 @@ 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 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

@@ -3,12 +3,19 @@ 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";
+		//コンストラクタを使ってインスタンスを作成
+		Student student1 = new Student(1,"鈴木一郎");
+		Student student2 = new Student(2,"田中花子");
+		Student student3 = new Student(3,"佐藤次郎");
 		
-		student.printProfile();
+		//メソッド呼び出し
+		student1.printProfile();
+		student2.printProfile();
+		student3.printProfile();
+		
+		//クラスから直接呼び出し
+		System.out.println("現在の生徒数" +Student.getStudentCount() + "人");
 	}
 
 }

em-oop/src/BasicCheck3.java

@@ -0,0 +1,34 @@
+
+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];
+		
+		items[0] = new Item();
+		items[0].setName("ノート");
+		items[0].setPrice(120);
+		items[0].setStock(50);
+
+		items[1] = new Item();
+		items[1].setName("消しゴム");
+		items[1].setPrice(80);
+		items[1].setStock(30);
+
+		items[2] = new Item();
+		items[2].setName("鉛筆");
+		items[2].setPrice(60);
+		items[2].setStock(100);
+		
+		items[0].sell(5);
+		items[1].sell(5);
+		items[2].sell(5);
+		
+		for(int i= 0;i<3;i++) {
+			System.out.println(items[i]);
+			
+		}
+		
+	}
+}

em-oop/src/Book.java

@@ -1,4 +1,20 @@
 
 public class Book {
+	public String title;
+	public String author;
+	public int price;
+
+	//引数なしコンストラクタ
+	public Book() {
+		title = "タイトル未設定";
+		author = "著者未定";
+		price = ０;
+	}
+	//3つの引数を持つコンストラクタ
+	public Book(String title, String author, int price) {
+		this.title = title;
+		this.author = author;
+		this.price = price;
+	}
 
 }

em-oop/src/Day3Check2.java

@@ -0,0 +1,11 @@
+
+public class Day3Check2 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		Rectangle r = new Rectangle(3, 4);
+		r.showInfo();
+		Greeting gre = new JapaneseGreeting();
+		System.out.println(gre.hello());
+	}
+}

em-oop/src/Day3Check3.java

@@ -0,0 +1,17 @@
+
+public class Day3Check3 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		//Shape型の変数shapeにradius引数2のCircle代入
+		Shape shape1 = new Circle(2);
+		shape1.showInfo();
+		
+		//Shape型の変数2に引数(widthが3、heightが4)を代入する
+		Shape shape2 = new Rectangle(3, 4);
+		shape2.showInfo();
+
+	}
+
+}

em-oop/src/EmployeeData.java

@@ -0,0 +1,17 @@
+
+public class EmployeeData {
+	String idEmployee; 
+	String nmEmployee;
+	String knEmployee;
+	String mailAddress;
+	String password;
+	String idDepartment;
+	
+	void showInfo(){
+	System.out.println(idEmployee + "\t" + nmEmployee +
+			"\t" +knEmployee + "\t" + mailAddress +
+			"\t" +password + "\t" + idDepartment );
+	
+	}
+	
+}

em-oop/src/Greeting.java

@@ -0,0 +1,5 @@
+
+public interface Greeting {
+	String hello();	
+}
+

em-oop/src/Item.java

@@ -0,0 +1,39 @@
+
+public class Item {
+	//
+	String name;
+	private int price;
+	private int stock;
+	
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public int getPrice() {
+		return price;
+	}
+
+	public void setPrice(int price) {
+		this.price = price;
+	}
+
+	public int getStock() {
+		return stock;
+	}
+
+	public void setStock(int stock) {
+		this.stock = stock;
+	}
+
+	void sell(int amount) {
+		this.setStock(this.getStock() - amount);
+	}
+	@Override
+	public String toString() {
+		return getName() + " " + getPrice() + "円 (残り" + getStock() + "個)";
+	}
+}

em-oop/src/JapaneseGreeting.java

@@ -0,0 +1,10 @@
+//
+public class JapaneseGreeting implements Greeting{
+	@Override
+	public String hello() {
+		// TODO 自動生成されたメソッド・スタブ
+		return "こんにちは";
+	}
+	
+
+}

em-oop/src/Main.java

@@ -0,0 +1,59 @@
+
+public class Main {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+
+		//型、変数宣言しインスタンス化
+		EmployeeData employee = new EmployeeData();
+		
+		EmployeeData[] employees = new EmployeeData[5];
+		employees[0] = new EmployeeData();
+		employees[1] = new EmployeeData();
+		employees[2] = new EmployeeData();
+		employees[3] = new EmployeeData();
+		employees[4] = new EmployeeData();
+		
+		//フィールドに代入
+		employees[0].idEmployee = "10000";
+		employees[0].nmEmployee = "山田龍也";
+		employees[0].knEmployee = "ヤマダタツヤ";
+		employees[0].mailAddress = "yamada@hoge.jp";
+		employees[0].password = "aaa";
+		employees[0].idDepartment = "10";
+		
+		employees[1].idEmployee = "10001";
+		employees[1].nmEmployee = "高橋準";
+		employees[1].knEmployee = "タカハシジュン";
+		employees[1].mailAddress = "jtaka@hoge.jp";
+		employees[1].password = "bbb";
+		employees[1].idDepartment = "10";
+		
+		employees[2].idEmployee = "10002";
+		employees[2].nmEmployee = "麻枝史明";
+		employees[2].knEmployee = "マエダフミアキ";
+		employees[2].mailAddress = "fumi@hoge.jp";
+		employees[2].password = "ccc";
+		employees[2].idDepartment = "11";
+		
+		employees[3].idEmployee = "10003";
+		employees[3].nmEmployee = "丸戸章介";
+		employees[3].knEmployee = "マルトショウスケ";
+		employees[3].mailAddress = "marusyo@hoge.jp";
+		employees[3].password = "ddd";
+		employees[3].idDepartment = "12";
+		
+		employees[4].idEmployee = "10004";
+		employees[4].nmEmployee = "三宅武";
+		employees[4].knEmployee = "ミヤケタケシ";
+		employees[4].mailAddress = "miya@hoge.jp";
+		employees[4].password = "eee";
+		employees[4].idDepartment = "13";
+		
+		for(int i= 0; i < 5 ; i++) {
+			employees[i].showInfo();
+		}
+
+	}
+
+}

em-oop/src/Student.java

@@ -1,8 +1,23 @@
 
 public class Student {
+		//変数を作る
 		int studentId;
 		String name;
 		
+		//フィールド追加
+		static int studentCount = 0;
+		//コンストラクタ追加
+		public Student(int studentId,String name) {
+			this.studentId = studentId;
+			this.name = name;
+			studentCount++;
+		}
+		
+		//メソッド追加
+		public static int getStudentCount() {
+			return studentCount;
+		}
+		//メソッド
 		public void printProfile() {
 		System.out.println("学籍番号:" + this.studentId + " 名前:" + this.name);