import java.util.HashMap;

public class HashMapDemoMain {
	public static void main(String args[]) {

		//キーと値のペアでデータを管理するマップ
		HashMap<String, Student> map = new HashMap<String, Student>();

		map.put("あべゆきえ", new Student(1, "安倍", "幸恵"));
		map.put("いとうしんじ", new Student(2, "伊藤", "信二"));

		if (map.containsKey("いとうしんじ")) {
			Student gakusei = map.get("いとうしんじ");
			gakusei.showData();
		}

	}
}

class Student {
	private int no;// 出席番号
	private String lastName;// 姓
	private String firstName;// 名

	public Student(int no, String lastName, String firstName) {
		super();
		this.no = no;
		this.lastName = lastName;
		this.firstName = firstName;
	}

	public void showData() {
		System.out.println(no + "番:" + lastName + " " + firstName);
	}
}