20 Commits

Author SHA1 Message Date
m-endo
3cfaa1442d Day3、5段階目完了 2026-09-24 15:32:17 +09:00
m-endo
d4d3422897 Day1、9段階目完了 2026-09-24 14:12:03 +09:00
m-endo
1777d45dd1 Day1、8段回目完了 2026-09-24 13:30:29 +09:00
m-endo
b55cbe7128 Day1、7段階目完了 2026-09-18 16:28:48 +09:00
m-endo
271bb746d8 Day3,4段階目完了 2026-09-18 15:18:22 +09:00
m-endo
0c5fa9f2f1 Day3、3段階目完了 2026-09-18 14:14:26 +09:00
m-endo
cc5ae0b0b8 Day3、2段階目完了 2026-09-18 14:08:32 +09:00
m-endo
2fe57b16c1 Day2、6段階目完了 2026-09-18 12:46:26 +09:00
m-endo
c51b46691c Day2、5段階目完了 2026-09-18 11:27:46 +09:00
m-endo
6489946460 Day2、4段階目完了 2026-09-18 11:02:20 +09:00
m-endo
c7a73431b1 Day2、3段階目完了 2026-09-17 15:08:34 +09:00
m-endo
bec44823e1 Day1、5段階目完了 2026-09-17 13:38:24 +09:00
m-endo
922e9cb829 Day1、4段階目完了 2026-09-17 13:28:26 +09:00
m-endo
909322f244 Day31段階目完了 2026-09-16 14:00:12 +09:00
m-endo
9c55517492 Day2第2段階完了 2026-09-15 15:58:16 +09:00
m-endo
6331059990 Day1第3段階完了 2026-09-15 15:27:33 +09:00
m-endo
01b47fa684 Day2第一段階完了 2026-09-15 13:22:22 +09:00
m-endo
4ac32d9a18 3段階目途中 2026-09-14 16:49:59 +09:00
m-endo
55f693acce 2段階目完了 2026-09-14 16:13:11 +09:00
m-endo
29c3693c68 1段階目完了 2026-09-14 14:50:43 +09:00
23 changed files with 301 additions and 427 deletions

6
.classpath Normal file
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@@ -0,0 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
<classpathentry kind="src" path="em-oop/src"/>
<classpathentry kind="output" path="bin"/>
</classpath>

17
.project Normal file
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@@ -0,0 +1,17 @@
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>java-cui-em-oop</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
</projectDescription>

6
em-oop/.classpath Normal file
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@@ -0,0 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
<classpathentry kind="src" path="src"/>
<classpathentry kind="output" path="bin"/>
</classpath>

2
em-oop/.gitignore vendored Normal file
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@@ -0,0 +1,2 @@
/bin/
/.metadata/

17
em-oop/.project Normal file
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@@ -0,0 +1,17 @@
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>em-oop</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
</projectDescription>

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@@ -1,6 +1,6 @@
public abstract class BaseData { public abstract class BaseData {
//3-4 //抽象メソッドを宣言
public abstract String toString(); public abstract String toString();
public abstract String toCSV(); public abstract String toCSV();

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@@ -2,27 +2,22 @@
public class BasicCheck1 { public class BasicCheck1 {
public static void main(String[] args) { public static void main(String[] args) {
//1-1 //Book book = new Book();
// Book book = new Book();
// book.title = "吾輩は猫である"; //book.title = "吾輩は猫である";
// book.author = "夏目漱石"; //book.author = "夏目漱石";
// book.price = 800; //book.price = 800;
//
// System.out.println(book.title); //System.out.println(book.title);
// System.out.println(book.author); //System.out.println(book.author);
// System.out.println(book.price); //System.out.println(book.price);
//1-1
//引数なし
//2-1
Book book1 = new Book(); Book book1 = new Book();
System.out.println(book1.title);
System.out.println(book1.author); //引数あり
System.out.println(book1.price);
Book book2 = new Book("銀河鉄道の夜", "宮沢賢治", 500); 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);
//2-1
} }
} }

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@@ -1,24 +1,21 @@
public class BasicCheck2 { public class BasicCheck2 {
public static void main(String[] args) { public static void main(String[] args) {
//1-2 //変数宣言
// Student student = new Student(); Student students = new Student();
// student.studentId=1; //代入
// student.name="鈴木一郎"; //student.studentId = 1;
// //student.name = "鈴木一郎";
// student.printProfile(); //student.printProfile();
//1-2
//2-3 Student students1 = new Student(1, "鈴木一郎");
Student student1 = new Student(1, "鈴木一郎"); Student students2 = new Student(2, "田中花子");
student1.printProfile(); Student students3 = new Student(3, "佐藤次郎");
Student student2 = new Student(2, "田中花子");
student2.printProfile();
Student student3 = new Student(3, "佐藤次郎");
student3.printProfile();
System.out.println("現在の生徒数:" + Student.getStudentCount() + "人"); students1.printProfile();
//2-3 students2.printProfile();
students3.printProfile();
System.out.println("現在の生徒数:" + Student.getstudentCount() + "人");
} }
} }

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@@ -1,19 +1,36 @@
public class BasicCheck3 { public class BasicCheck3 {
public static void main(String[] args) {
//1-3
Item[] items = new Item[3];
items[0] = new Item("ノート", 120, 50);
items[1] = new Item("消しゴム", 80, 30);
items[2] = new Item("鉛筆", 60, 100);
for (int i = 0; i < 3; i++) { public static void main(String[] args) {
items[i].sell(5); //配列3件分
//2-2 Item[] items = new Item[3];
System.out.println(items[i].toString()); //newインスタンス代入
//2-2 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);
//for文残り数の引き算
for (int i = 0; i <= 2 ; i++) {
items[i].sell(5);
} }
//1-3 //3件出力
for (int i = 0; i <= 2 ; i++) {
System.out.println(items[i]);
} }
}
} }

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@@ -1,22 +1,21 @@
public class Book { public class Book {
//1-1
String title; String title;
String author; String author;
int price; int price;
//1-1
//コンストラクタ生成
//2-1
public Book() { public Book() {
title = "タイトル未設定"; System.out.println( "タイトル未設定");
author = "著者未設定"; System.out.println( "著者未設定");
price = 0; System.out.println( "0");
} }
//3つの引数を持つコンストラクタ生成
public Book(String title, String author, int price) { public Book(String title, String author, int price) {
this.title = title; System.out.println(this.title = title);
this.author = author; System.out.println(this.author = author);
this.price = price; System.out.println(this.price = price);
} }
//2-1
} }

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@@ -1,20 +1,21 @@
public class Circle extends Shape { public class Circle extends Shape {
//フィールド
private double radius; private double radius;
//コンストラクタ
public Circle(double radius) { public Circle(double radius) {
super("円"); super("円");
this.radius = radius; this.radius = radius;
} }
//メソッド1
@Override @Override
public double area() { public double area() {
return Math.PI * radius * radius; return Math.PI * radius * radius;
} }
//メソッド2
@Override @Override
public void showInfo() { public void showInfo() {
super.showInfo(); super.showInfo();
System.out.println("(半径:" + this.radius + ")"); System.out.println("半径:" + this.radius + "");
} }
} }

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@@ -2,8 +2,9 @@
public class Day3Check1 { public class Day3Check1 {
public static void main(String[] args) { public static void main(String[] args) {
Circle circle = new Circle(2); //インスタンス
circle.showInfo(); Circle circle = new Circle(2.0);
} circle.showInfo();
}
} }

View File

@@ -1,11 +1,17 @@
public class Day3Check2 { public class Day3Check2 {
public static void main(String[] args) {
Rectangle rectangle = new Rectangle(3, 4);
rectangle.showInfo();
public static void main(String[] args) {
//インスタンス
Rectangle rect = new Rectangle(3.0,4.0);
//メソッド呼び出し
rect.showInfo();
//戻り値出力
//Greeting greeting = new JapaneseGreeting();
//System.out.println();
//インスタンスを代入
Greeting greeting = new JapaneseGreeting(); Greeting greeting = new JapaneseGreeting();
System.out.println(greeting.hello()); System.out.println(greeting.hello());
} }
} }

View File

@@ -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
//インスタンスを代入
Shape shape1 = new Circle(2);
//メソッド呼び出し
shape1.showInfo();
//インスタンスを代入
Shape shape2 = new Rectangle(3, 4);
//メソッド呼び出し
shape2.showInfo();
}
}

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@@ -1,12 +0,0 @@
public class DayCheck3 {
public static void main(String[] args) {
Shape shape1 = new Circle(2);
shape1.showInfo();
Shape shape2 = new Rectangle(3, 4);
shape2.showInfo();
}
}

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@@ -1,44 +0,0 @@
public class DepartmentData extends BaseData {
//3-6
private String idDepartment;
private String nmDepartment;
//3-6
public DepartmentData(String idDepartment, String nmDepartment) {
this.idDepartment = idDepartment;
this.nmDepartment = nmDepartment;
}
@Override
public String toString() {
return getIdDepartment() + "\t" + getNmDepartment();
}
@Override
public String toCSV() {
return getIdDepartment() + "," + getNmDepartment();
}
@Override
public String getPrimaryKeyValue() {
return getIdDepartment();
}
public String getIdDepartment() {
return idDepartment;
}
public void setIdDepartment(String idDepartment) {
this.idDepartment = idDepartment;
}
public String getNmDepartment() {
return nmDepartment;
}
public void setNmDepartment(String nmDepartment) {
this.nmDepartment = nmDepartment;
}
//3-6
}

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@@ -1,104 +1,18 @@
public class EmployeeData extends BaseData { public class EmployeeData extends BaseData {
//1-4 //フィールド宣言
private String IdEmployee, nmEmployee, knEmployee, mailAddress, password, idDepartment; private String idEmployee;//社員ID
//1-4 + 2-4 private String nmEmployee;//社員名
private String knEmployee;//社員カナ
private String mailAddress;//メールアドレス
private String password;//パスワード
private String idDepartment;//部署ID
//1-6
// public EmployeeData(String idEmployee, String nmEmployee, String knEmployee, String mailAddress, String password,
// String idDepartment) {
// this.IdEmployee = idEmployee;
// this.nmEmployee = nmEmployee;
// this.knEmployee = knEmployee;
// this.mailAddress = mailAddress;
// this.password = password;
// this.idDepartment = idDepartment;
// }
//1-6
//1-5
//2-4
//2-6
@Override
public String toString() {
// System.out.println(getIdEmployee() + "\t" + getNmEmployee() + "\t" + getKnEmployee() + "\t" + getMailAddress()
// + "\t" + getPassword() + "\t" + getIdDepartment());
return (getIdEmployee() + "\t" + getNmEmployee() + "\t" + getKnEmployee() + "\t" + getMailAddress()
+ "\t" + getPassword() + "\t" + getIdDepartment());
}
//2-6
//2-4
//1-5
//3-4
@Override
public String toCSV() {
return getIdEmployee() + "," + getNmEmployee() + "," + getKnEmployee() + "," + getMailAddress()
+ "," + getPassword() + "," + getIdDepartment();
}
public String getPrimaryKeyValue() {
return IdEmployee;
}
//3-4
//1-7
boolean isMatchId(String id) {
System.out.println(id + " を検索します");
if (id.equals(IdEmployee)) {
System.out.println(true);
} else {
System.out.println(false);
}
return false;
}
//1-7
//2-5
public EmployeeData() {
//2-7
empCount++;
//2-7
}
public EmployeeData(String idEmployee, String nmEmployee, String knEmployee, String mailAddress, String password,
String idDepartment) {
this.setIdEmployee(idEmployee);
this.setNmEmployee(nmEmployee);
this.setKnEmployee(knEmployee);
this.setMailAddress(mailAddress);
this.setPassword(password);
this.setIdDepartment(idDepartment);
//2-7
empCount++;
//2-7
}
//2-5
//2-7
private static int empCount = 0;
static int getEmpCount() {
return empCount;
}
//2-7
//2-4
public String getIdEmployee() { public String getIdEmployee() {
return IdEmployee; return idEmployee;
} }
public void setIdEmployee(String idEmployee) { public void setIdEmployee(String idEmployee) {
//2-9 this.idEmployee = idEmployee;
idEmployee = idEmployee.strip();
if (idEmployee.length() == 0) {
System.out.println("社員IDが空のため設定できませんでした");
return;
} else {
this.IdEmployee = idEmployee;
}
//2-9
} }
public String getNmEmployee() { public String getNmEmployee() {
@@ -106,15 +20,7 @@ public class EmployeeData extends BaseData {
} }
public void setNmEmployee(String nmEmployee) { public void setNmEmployee(String nmEmployee) {
//2-8 this.nmEmployee = nmEmployee;
nmEmployee = nmEmployee.strip();
if (nmEmployee.length() == 0) {
System.out.println("社員名が空のため設定できませんでした");
return;
} else {
this.nmEmployee = nmEmployee;
}
//2-8
} }
public String getKnEmployee() { public String getKnEmployee() {
@@ -148,5 +54,60 @@ public class EmployeeData extends BaseData {
public void setIdDepartment(String idDepartment) { public void setIdDepartment(String idDepartment) {
this.idDepartment = idDepartment; this.idDepartment = idDepartment;
} }
//2-4
//メソッド追加
void showInfo() {
System.out.println(getIdEmployee());
System.out.println(getNmEmployee());
System.out.println(getKnEmployee());
System.out.println(getMailAddress());
System.out.println(getPassword());
System.out.println(getIdDepartment());
}
//上記メソッドの書き換え
@Override
public String toString() {
return getIdEmployee() + "\t"+
getNmEmployee() + "\t"+
getKnEmployee() + "\t"+
getMailAddress() + "\t"+
getPassword() + "\t"+
getIdDepartment();
}
//コンストラクタ追加(引数なし)
public EmployeeData() {
}
//6つ引数持ちコンストラクタ追加
public EmployeeData(String idEmployee, String nmEmployee, String knEmployee, String mailAddress, String password,
String idDepartment) {
this.setIdEmployee(idEmployee);
this.setNmEmployee(nmEmployee);
this.setKnEmployee(knEmployee);
this.setMailAddress(mailAddress);
this.setPassword(password);
this.setIdDepartment(idDepartment);
}
//メソッド2つ追加
@Override
public String toCSV() {
return getIdEmployee() + "," + getNmEmployee() + "," + getKnEmployee() + "," + getMailAddress() + ","
+ getPassword() + "," + getIdDepartment();
}
@Override
public String getPrimaryKeyValue() {
return this.idEmployee;
}
//メソッド追加、7段目
public boolean isMatchID(String id) {
return idEmployee.equals(id);
}
} }

View File

@@ -1,28 +1,16 @@
public class Item { public class Item {
//1-3 //フィールド宣言
private String name; private String name;
private int price; private int price;
private int stock; private int stock;
public Item(String name, int price, int stock) { //メソッド宣言
this.name = name;
this.price = price;
this.stock = stock;
}
void sell(int amount) { void sell(int amount) {
// this.stock = this.stock - amount; this.setStock(this.getStock() - amount);
this.setStock(this.getStock() - amount); //2-2
//System.out.println(name + " " + price + "円 残り" + stock + "個");
}
//1-3
//2-2
@Override
public String toString() {
return getName() + "" + getPrice() + "円(残り" + getStock() + "個)";
} }
//ゲッター、セッター設定
public String getName() { public String getName() {
return name; return name;
@@ -47,5 +35,8 @@ public class Item {
public void setStock(int stock) { public void setStock(int stock) {
this.stock = stock; this.stock = stock;
} }
//2-2 @Override
} public String toString() {
return getName() + " " + getPrice() + "円 (残り" + getStock() + "個)";
}
}

View File

@@ -1,7 +1,7 @@
public class JapaneseGreeting implements Greeting { public class JapaneseGreeting implements Greeting{
@Override @Override
public String hello() { public String hello(){
return "こんにちは"; return "こんにちは";
} }
} }

View File

@@ -1,168 +1,55 @@
//import java.util.Scanner;//1-8 import java.util.Scanner;
public class Main { public class Main {
public static void main(String[] args) { public static void main(String[] args) {
//1-8 // TODO 自動生成されたメソッド・スタブ
// Scanner scanner = new Scanner(System.in); //インスタンス宣言
// //1-9 BaseData employee = new EmployeeData();
// boolean end = false; //配列5件分
// while (!end) { BaseData[] employees = new BaseData[5];
// //1-9 //5段階目書き換え
// System.out.println("検索したい社員IDを入力してください(終了するには0を入力)"); employees[0] = new EmployeeData("10000", "山田龍也", "ヤマダタツヤ", "yamada@hoge.jp", "aaa", "10");
// String num = scanner.nextLine().strip(); employees[1] = new EmployeeData("10001", "高橋準", "タカハシジュン", "jtaka@hoge.jp", "bbb", "10");
// boolean found = false; employees[2] = new EmployeeData("10002", "麻枝文明", "マエダフミアキ", "fmak@hoge.jp", "ccc", "11");
//1-8 employees[3] = new EmployeeData("10003", "丸戸章介", "マルトショウスケ", "marusyo@hoge.jp", "ddd", "12");
//1-4 employees[4] = new EmployeeData("10004", "三宅武", "ミヤケタケシ", "miya@hoge.jp", "eee", "13");
// BaseData employee = new EmployeeData();
// employee.setIdEmployee("10000");
// employee.setNmEmployee("山田龍也");
// employee.setKnEmployee("ヤマダタツヤ");
// employee.setMailAddress("yamada@hoge.jp");
// employee.setPassword("aaa");
// employee.setIdDepartment("10");
// System.out.println(employee.getIdEmployee()); //5段階目記載の処理呼び出し
// System.out.println(employee.getNmEmployee()); //employee.showInfo();
// System.out.println(employee.getKnEmployee());
// System.out.println(employee.getMailAddress());
// System.out.println(employee.getPassword());
// System.out.println(employee.getIdDepartment());
//1-4
//3-4 //Day1、8段階目検索
// System.out.println(employee.toCSV()); while (true) {
// System.out.println(employee.getPrimaryKeyValue()); Scanner sc = new Scanner(System.in);//インスタンス化
//3-4 System.out.println("検索したい社員IDを入力してください(終了する場合は0を入力)");
String id = sc.next();
//2-5 if (id.equals("0")) {
// EmployeeData emp1 = new EmployeeData("10000", "山田龍也", "ヤマダタツヤ", "yamada@hoge.jp", "aaa", "10"); System.out.println("システムを終了します");
// EmployeeData emp2 = new EmployeeData("10001", "高橋準", "タカハシジュン", "Jtaka@hoge.jp", "bbb", "11"); break;
// EmployeeData emp3 = new EmployeeData("10002", "麻枝史明", "マエダフミアキ", "fmak@hoge.jp", "ccc", "12");
// EmployeeData emp4 = new EmployeeData("10003", "丸戸章介", "マルトショウスケ", "marusyo@hoge.jp", "ddd", "13");
// EmployeeData emp5 = new EmployeeData("10004", "三宅武", "ミヤケタケシ", "miya@hoge.jp", "eee", "14");
//2-5
//1-6
BaseData[] employee = new EmployeeData[5];
employee[0] = new EmployeeData("10000", "山田龍也", "ヤマダタツヤ", "yamada@hoge.jp", "aaa", "10");
employee[1] = new EmployeeData("10001", "高橋準", "タカハシジュン", "Jtaka@hoge.jp", "bbb", "10");
employee[2] = new EmployeeData("10002", "麻枝史明", "マエダフミアキ", "fmak@hoge.jp", "ccc", "11");
employee[3] = new EmployeeData("10003", "丸戸章介", "マルトショウスケ", "marusyo@hoge.jp", "ddd", "12");
employee[4] = new EmployeeData("10004", "三宅武", "ミヤケタケシ", "miya@hoge.jp", "eee", "13");
//1-5
//1-6
//2-5
// System.out.println(emp1);
// System.out.println(emp2);
// System.out.println(emp3);
// System.out.println(emp4);
// System.out.println(emp5);
// for (int i = 0; i < employee.length; i++) {
// System.out.println(employee[i]);
// }
//2-7
// System.out.println("現在の社員データ件数:" + EmployeeData.getEmpCount() + "件");
// for (int i = 0; i < 5; i++) {
// employee[i].showInfo();
// }
//2-7
//2-5
//1-6
//1-5
//1-7
//3-5
// System.out.println(employee[2].getPrimaryKeyValue().equals("10002"));
// System.out.println(employee[2].getPrimaryKeyValue().equals("99999"));
//3-5
//1-7
//1-8
// for (int i = 0; i < employee.length; i++) {
// if (num.equals(employee[i].getIdEmployee())) {
// //2-6
// System.out.println(employee[i]);
// //2-6
//// employee[i].showInfo();
// found = true;
// break;
// } else if (num.equals("0")) {
// System.out.println("システムを終了します");
// return;
// }
// }
// if (!found) {
// System.out.println("該当する社員が見つかりませんでした");
// }
//1-8 isMatchIdメソッドを使っていない
// }
//3-6
BaseData[] allData = new BaseData[11];
allData[0] = employee[0];
allData[1] = employee[1];
allData[2] = employee[2];
allData[3] = employee[3];
allData[4] = employee[4];
DepartmentData dept = new DepartmentData("10", "役員");
allData[5] = dept;
DepartmentData dept2 = new DepartmentData("11", "人事・総務部");
allData[6] = dept2;
DepartmentData dept3 = new DepartmentData("12", "経理部");
allData[7] = dept3;
DepartmentData dept4 = new DepartmentData("13", "システム開発事業部");
allData[8] = dept4;
DepartmentData dept5 = new DepartmentData("14", "教育事業部");
allData[9] = dept5;
DepartmentData dept6 = new DepartmentData("15", "営業企画部");
allData[10] = dept6;
for (int i = 0; i < 11; i++) {
System.out.println(allData[i]);
}
//3-6
//3-7
int Cou = 0;
int Cou2 = 0;
for (int i = 0; i < 11; i++) {
if (allData[i] instanceof EmployeeData) {
Cou = Cou + 1;
} else if (allData[i] instanceof DepartmentData) {
Cou2 = Cou2 + 1;
} }
} //boolean変数作成
System.out.println("社員データ:" + Cou + "件"); boolean result = false;
System.out.println("部署データ:" + Cou2 + "件"); //該当の場合
//3-7 for (int i = 0; i < employees.length; i++) {
if (employees[i].getPrimaryKeyValue().equals(id)) {
//3-8 result = true;
for (int i = 0; i < 11; i++) { System.out.println(employees[i]);
if (allData[i] instanceof EmployeeData) { break;
EmployeeData emp = (EmployeeData) allData[i];
System.out.println(emp.getMailAddress());
}
}
//3-8
//3-9
for (int i = 0; i < 11; i++) {
if (allData[i] instanceof DepartmentData) {
DepartmentData bd = (DepartmentData) allData[i];
if (bd.getNmDepartment().equals("システム開発事業部")) {
for (int j = 0; j < 11; j++) {
if (allData[j] instanceof EmployeeData) {
EmployeeData emp = (EmployeeData) allData[j];
if (bd.getIdDepartment().equals(emp.getIdDepartment())) {
System.out.println(emp.getNmEmployee() + "\t" + emp.getMailAddress());
}
}
}
} }
} }
if (result == false) {
System.out.println("該当する社員が見つかりませんでした(終了する場合は0を入力)");
}
}
//for文
//for (int i = 0; i < employees.length; i++) {
//System.out.println(employees[i]);
//System.out.println(employees[i].toCSV());
//System.out.println(employees[i].getPrimaryKeyValue());
//employees[i].showInfo();を上記に書き換え
} }
//3-9
} }
}

View File

@@ -1,16 +1,20 @@
public class Rectangle extends Shape { public class Rectangle extends Shape {
//フィールド
private double width; private double width;
private double height; private double height;
//コンストラクタ
public Rectangle(double width, double height) { public Rectangle(double width, double height) {
super("四角形"); super("四角形");
this.width = width; this.width = width;
this.height = height; this.height = height;
} }
//抽象メソッドのオーバーライド
@Override @Override
public double area() { public double area() {
return width * height; return width * height;
} }
} }

View File

@@ -1,14 +1,18 @@
public abstract class Shape { public abstract class Shape {
//フィールド宣言
private String name; private String name;
//コンストラクタ
public Shape(String name) { public Shape(String name) {
this.name = name; this.name = name;
} }
//メソッド1(抽象メソッド)
public abstract double area(); public abstract double area();
public void showInfo() { //メソッド2
void showInfo() {
System.out.println(this.name + "の面積は" + this.area() + "です"); System.out.println(this.name + "の面積は" + this.area() + "です");
} }
} }

View File

@@ -1,27 +1,29 @@
public class Student { public class Student {
//1-2 //フィールド宣言
int studentId; int studentId;
String name; String name;
//フィールド追加
static int studentCount = 0;
//メソッド宣言
void printProfile() { void printProfile() {
System.out.println("学籍番号:" + this.studentId + " 名前:" + this.name); System.out.println("学籍番号:" + this.studentId + " 名前:" + this.name);
} }
//1-2
//2-3 //コントラクタ追加
public Student(int studentId, String name) { public Student(int studentId, String name) {
this.studentId = studentId; this.studentId = studentId;
this.name = name; this.name = name;
} }
public Student() {
static int studentCount = 0; // TODO 自動生成されたコンストラクター・スタブ
{
studentCount++;
} }
static int getStudentCount() { //コントラクタ追加
public static int getstudentCount() {
return studentCount; return studentCount;
} }
//2-3
} }