[기본과제/심화과제] 1주차 자바 객체지향 개념/ 은행 구현하기

First/First.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+ <component name="NewModuleRootManager" inherit-compiler-output="true">
+ <exclude-output />
+ <content url="file://$MODULE_DIR$">
+ <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+ </content>
+ <orderEntry type="inheritedJdk" />
+ <orderEntry type="sourceFolder" forTests="false" />
+ </component>
+</module>

First/src/Animal.java

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+public class Animal {
+ private String species;
+ private String name;
+ private int age;
+
+ public void speak() {
+ System.out.println("동물이 소리를 냅니다.");
+ }
+
+ public void drink() {
+ System.out.println("동물이 물을 마십니다.");
+ }
+}

First/src/Calculator.java

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+public class Calculator {
+ Character operator;
+ public int add(int a, int b) {
+ return a + b;
+ }
+ public double add(double a, double b) {
+ return a + b;
+ }
+ //여기서는 리턴 타입이 다르기때문에 오버로딩이다!
+}

First/src/Car.java

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+public interface Car {
+ public abstract void turnOn();
+ public abstract void turnOff();
+}

First/src/ConvenienceStore.java

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+public class ConvenienceStore {
+
+ String brand;
+ String address;
+
+ int staffCount;
+ int visitorCount;
+
+ public ConvenienceStore(String brand,String address,int staffCount,int visiotrCount){
+ this.brand=brand;
+ this.address=address;
+ this.staffCount=staffCount;
+ this.visitorCount=visiotrCount;
+ }
+ public void addStaffCount() {
+ staffCount++;
+ }
+
+ public int getStaffCount() {
+ return staffCount;
+ }
+
+ public void addVisitorCount() {
+ visitorCount++;
+ }
+
+ public void initVisitorCount() {
+ visitorCount = 0;
+ }
+
+ public int getVisitorCount() {
+ return visitorCount;
+ }
+
+ public void printConvenienceStoreInfo() {
+ System.out.println("편의점 브랜드: " + brand);
+ System.out.println("편의점 주소: " + address);
+ System.out.println("편의점 직원 수: " + staffCount);
+ System.out.println("편의점 방문자 수: " + visitorCount);
+ }
+}

First/src/Dog.java

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+public class Dog extends Animal {
+ private String gender;
+ public void walk() {
+ System.out.println("강아지가 산책을 합니다.");
+ }
+ //오버라이딩은 부모 클래스의 동작을 재정의!
+ @Override
+ public void speak() {
+ System.out.println("월월");
+ }
+}

First/src/GenericTest.java

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+class GenericClass <T, E> {
+ T type;
+ E element;
+}
+class GenericMethod {
+ public <T> T genericMethod(T type) {
+ return type;
+ }
+}
+public class GenericTest {
+ public static void main(String[] args) {
+ GenericClass<Integer, String> genericClass = new GenericClass<Integer, String>();
+ GenericMethod genericMethod = new GenericMethod();
+
+ String hello = genericMethod.genericMethod("Hello");
+ System.out.println(hello);
+ }
+
+}

First/src/HardMisson/Bank.java

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+package HardMisson;
+
+public interface Bank {
+ public abstract void deposit(int money);
+
+
+
+ public abstract void withdraw(int money);
+ public abstract void checkMoney();
+
+}

First/src/HardMisson/BankUser.java

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+package HardMisson;
+
+public class BankUser {
+ public static void main(String[] args) {
+ WooriBank wooriBank=new WooriBank(0,"010-1234-5678","www.wooribank.com");
+ //인스턴스 생성,힙에 할당되게 됩니당
+ wooriBank.deposit(1000);
+ wooriBank.checkMoney();
+ wooriBank.withdraw(2000);// 에러 처리 발생~
+ }
+
+
+
+}

First/src/HardMisson/WooriBank.java

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+package HardMisson;
+
+import HardMisson.Bank;
+
+public class WooriBank implements Bank {
+
+ int currentMoney;
+ String telephone;
+ String webUrl;
+
+ public WooriBank(int currentMoney,String telephone,String webUrl){
+ this.currentMoney=currentMoney;
+ this.telephone=telephone;
+ this.webUrl=webUrl;
+ System.out.println("은행 생성완료!");
+ }
+ @Override
+ public void deposit(int money) {
+ this.currentMoney=this.currentMoney+money;
+ System.out.println(money+"만큼 입금되었습니다!");
+ }
+
+ @Override
+ public void withdraw(int money){
+ if(this.currentMoney-money<0){
+ System.out.println("잔고가 부족해 출금할 수 없습니다!");
+ }
+ else{
+ this.currentMoney=this.currentMoney-money;
+ System.out.println(money+"만큼 출금되었습니다!");}
+ };
+ @Override
+ public void checkMoney(){
+ System.out.println("현재 은행에 남은 잔고는 "+this.currentMoney+"입니다!");
+ };
+
+}

First/src/Main.java

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+public class Main {
+ public static void main(String[] args) {
+
+ Animal animal=new Animal();
+ animal.speak();
+
+ ConvenienceStore firstGS = new ConvenienceStore("GS 25", "지구 어딘가", 8, 0);
+
+ firstGS.addStaffCount();
+ firstGS.addVisitorCount();
+
+ firstGS.printConvenienceStoreInfo();
+
+ Calculator calculator = new Calculator();
+
+ int intResult = calculator.add(1, 10);
+ double doubleResult = calculator.add(1, 10);
+
+ System.out.println(intResult);
+ System.out.println(doubleResult);
+ }
+}
+

First/src/Person.java

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+public abstract class Person {
+ private String gender;
+
+ public abstract void walk();
+}
+
+class Student extends Person {
+ @Override
+ public void walk() {
+ System.out.println("학교로 걸어갈게요.");
+ }
+}