[기본과제/심화과제] 1주차 자바 객체지향 개념/ 은행 구현하기

First/First.iml

@@ -0,0 +1,11 @@
+<?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

@@ -0,0 +1,13 @@
+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

@@ -0,0 +1,10 @@
+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

@@ -0,0 +1,4 @@
+public interface Car {
+    public abstract void turnOn();
+    public abstract void turnOff();
+}

First/src/ConvenienceStore.java

@@ -0,0 +1,41 @@
+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

@@ -0,0 +1,11 @@
+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

@@ -0,0 +1,19 @@
+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

@@ -0,0 +1,11 @@
+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

@@ -0,0 +1,14 @@
+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

@@ -0,0 +1,37 @@
+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

@@ -0,0 +1,23 @@
+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

@@ -0,0 +1,12 @@
+public abstract class Person {
+    private String gender;
+
+    public abstract void walk();
+}
+
+class Student extends Person {
+    @Override
+    public void walk() {
+        System.out.println("학교로 걸어갈게요.");
+    }
+}