First seminar 과제 제출

firstSeminar/src/main/java/sopt/org/firstSeminar/AOP/SortService.java

@@ -0,0 +1,6 @@
+package sopt.org.firstSeminar.AOP;
+
+public interface SortService {
+
+ void sort();
+}

firstSeminar/src/main/java/sopt/org/firstSeminar/AOP/SortServiceImpl.java

@@ -0,0 +1,8 @@
+package sopt.org.firstSeminar.AOP;
+
+public class SortServiceImpl implements SortService {
+
+ public void sort() {
+ //정렬해줌
+ }
+}

firstSeminar/src/main/java/sopt/org/firstSeminar/AOP/SortServiceTime.java

@@ -0,0 +1,17 @@
+package sopt.org.firstSeminar.AOP;
+
+public class SortServiceTime implements SortService {
+ private SortService sortService;
+
+ public SortServiceTime(final SortService sortService) {
+ this.sortService = sortService;
+ }
+
+ @Override
+ public void sort() {
+ long start = System.currentTimeMillis();
+ sortService.sort();
+ long end = System.currentTimeMillis();
+ System.out.printf("실행시간: %d", (end-start));
+ }
+}

firstSeminar/src/main/java/sopt/org/firstSeminar/AOP/Sorter.java

@@ -0,0 +1,6 @@
+package sopt.org.firstSeminar.AOP;
+
+public interface Sorter {
+
+ void Sort();
+}

firstSeminar/src/main/java/sopt/org/firstSeminar/BankProgram/Account.java

@@ -0,0 +1,31 @@
+package sopt.org.firstSeminar.BankProgram;
+
+import static sopt.org.firstSeminar.BankProgram.BankClient.accountArrayList;
+
+public class Account {
+ private String ownerName;
+ private int AccountNumber;
+ private int balance;
+
+ public Account(String ownerName) {
+ this.ownerName = ownerName;
+ this.balance = 0;
+ this.AccountNumber = accountArrayList.size();
+ }
+
+ public void deposit(int money) {
+ this.balance += money;
+ }
+
+ public void withdraw(int money) {
+ if(balance >= money) {
+ this.balance -= money;
+ } else {
+ throw new RuntimeException("잔고 부족");
+ }
+ }
+
+ public int getBalance() {
+ return this.balance;
+ }
+}

firstSeminar/src/main/java/sopt/org/firstSeminar/BankProgram/Bank.java

@@ -0,0 +1,17 @@
+package sopt.org.firstSeminar.BankProgram;
+
+public abstract class Bank {
+
+ abstract public void printWelcomeComment();
+
+ abstract public void deposit(int accountNumber, int money);
+
+ abstract public void withdraw(int accountNumber, int money);
+
+ abstract public int getBalance(int accountNumber);
+
+ //클로징 멘트는 고정
+ public void printClosingComment() {
+ System.out.println("이용해주셔서 감사합니다.");
+ }
+}

firstSeminar/src/main/java/sopt/org/firstSeminar/BankProgram/BankClient.java

@@ -0,0 +1,33 @@
+package sopt.org.firstSeminar.BankProgram;
+
+import java.util.ArrayList;
+
+public class BankClient {
+ public static ArrayList<Account> accountArrayList;
+
+ public static void main(String[] args) {
+ //은행프로그램에서 사용할 계좌리스트
+ accountArrayList = new ArrayList<>();
+
+ //계좌 생성
+ Account account = new Account("shinjiyeon");
+ accountArrayList.add(account);
+
+ //신한은행 이용
+ BankService bankService = new BankService(new ShinhanBank());
+
+ //은행 이용 시작
+ bankService.printWelcomeComment();
+
+ //입금 & 잔액 확인
+ bankService.deposit(0, 1000);
+ bankService.checkBalance(0);
+
+ //출금 & 잔액 확인
+ bankService.withdraw(0, 500);
+ bankService.checkBalance(0);
+
+ //은행 이용 종료
+ bankService.printClosingComment();
+ }
+}

firstSeminar/src/main/java/sopt/org/firstSeminar/BankProgram/BankService.java

@@ -0,0 +1,32 @@
+package sopt.org.firstSeminar.BankProgram;
+
+public class BankService {
+ private Bank bank;
+
+ //생성자 주입
+ public BankService(Bank bank) {
+ this.bank = bank;
+ }
+
+ public void printWelcomeComment() {
+ bank.printWelcomeComment();
+ }
+
+ public void printClosingComment() {
+ bank.printClosingComment();
+ }
+
+ public void deposit(int accountNumber, int money) {
+ bank.deposit(accountNumber, money);
+ }
+
+ public void withdraw(int accountNumber, int money) {
+ bank.withdraw(accountNumber, money);
+ }
+
+ public void checkBalance(int accountNumber) {
+ int balance = bank.getBalance(accountNumber);
+ System.out.printf("고객님의 잔액은 %d원 입니다.", balance);
+ System.out.println();
+ }
+}

firstSeminar/src/main/java/sopt/org/firstSeminar/BankProgram/ShinhanBank.java

@@ -0,0 +1,38 @@
+package sopt.org.firstSeminar.BankProgram;
+
+import static sopt.org.firstSeminar.BankProgram.BankClient.accountArrayList;
+
+public class ShinhanBank extends Bank {
+ @Override
+ public void printWelcomeComment() {
+ System.out.println("어서오세요, 신한은행 입니다.");
+ }
+
+ @Override
+ public void deposit(int accountNumber, int money) {
+ Account account = getAccountByNumber(accountNumber);
+ account.deposit(money);
+ System.out.println("신한은행에 입금이 완료되었습니다.");
+ }
+
+ @Override
+ public void withdraw(int accountNumber, int money) {
+ Account account = getAccountByNumber(accountNumber);
+ try {
+ account.withdraw(money);
+ System.out.println("신한은행에서 출금이 완료되었습니다.");
+ } catch (Exception e) {
+ System.out.println("신한은행 계좌에 잔고가 부족합니다.");
+ }
+ }
+
+ @Override
+ public int getBalance(int accountNumber) {
+ Account account = getAccountByNumber(accountNumber);
+ return account.getBalance();
+ }
+
+ private Account getAccountByNumber(int accountNumber) {
+ return accountArrayList.get(accountNumber);
+ }
+}

firstSeminar/src/main/java/sopt/org/firstSeminar/FirstSeminarApplication.java

@@ -2,12 +2,18 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import sopt.org.firstSeminar.Inheritance.Animal;
+import sopt.org.firstSeminar.Inheritance.Cat;
 
 @SpringBootApplication
 public class FirstSeminarApplication {
 
  public static void main(String[] args) {
+
  SpringApplication.run(FirstSeminarApplication.class, args);
- }
 
+ Animal animal = new Cat("여자", 3, 6);
+ animal.eat("우유"); //자식클래스 Cat의 eat() 호출
+ //animal.superTest(); 상위클래스에서 하위클래스의 함수 알 수 없다!
+ }
 }

firstSeminar/src/main/java/sopt/org/firstSeminar/Inheritance/Animal.java

@@ -0,0 +1,26 @@
+package sopt.org.firstSeminar.Inheritance;
+
+public class Animal {
+ private String gender;
+ private int age;
+ private int weight;
+
+ public Animal(String gender, int age, int weight) {
+ //내부 생성자 호출로 중복 제거
+ this(gender, age);
+ this.weight = weight;
+ }
+
+ public Animal(String gender, int age) {
+ this.gender = gender;
+ this.age = age;
+ }
+
+ public void walk() {
+ System.out.println("동물이 걷습니다.");
+ }
+
+ public void eat(String food) {
+ System.out.println("동물이 "+ food + "를 먹습니다.");
+ }
+}

firstSeminar/src/main/java/sopt/org/firstSeminar/Inheritance/Cat.java

@@ -0,0 +1,25 @@
+package sopt.org.firstSeminar.Inheritance;
+
+public class Cat extends Animal {
+
+ public Cat(String gender, int age, int weight) {
+ //부모 클래스에서 매개변수 있는 생성자 만들어서 기본생성자가 자동으로 호출되지 X
+ //-> 부모 생성자 호출해줘야 한다.
+ super(gender, age, weight);
+ }
+
+ @Override
+ public void walk() {
+ System.out.println("고양이가 사뿐사뿐 걷습니다.");
+ }
+
+ @Override
+ public void eat(String food) {
+ System.out.println("고양이가 " + food + "를 먹습니다.");
+ }
+
+ public void superTest() {
+ walk(); //자식클래스의 walk() 실행
+ super.walk(); //부모클래스의 walk() 실행
+ }
+}