[JAVA/수업 과제 practice] 클래스와 객체 Lv. 3~4

✅ 답안과 비교하여 스스로 코드 개선점 짚어보기 완료(2022.01.03)

 

HARD1. 기본 생성자 활용 설정자(setter) 통한 필드값 변경과 접근자(getter) 이용한 필드값 출력 ✅

답안에서는 Application.class 맨 마지막에 scanner.close(); 구문을 넣어 스캐너를 종료시켰다.

입력한 임의의 값

package com.greedy.level03.hard.emp.model.dto;

public class EmployeeDTO {
	
	private int number;
	private String name;
	private String dept;
	private String job;
	private int age;
	private char gender;
	private int salary;
	private double bonusPoint;
	private String phone;
	private String address;
	
	/* 기본 생성자 */
	public EmployeeDTO() {}
	
	/* 설정자(setter) 메소드 */
	public void setNumber(int number) {
		this.number = number;
	}
	public void setName(String name) {
		this.name = name;
	}
	public void setDept(String dept) {
		this.dept = dept;
	}
	public void setJob(String job) {
		this.job = job;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public void setGender(char gender) {
		this.gender = gender;
	}
	public void setSalary(int salary) {
		this.salary = salary;
	}
	public void setBonusPoint(double bonusPoint) {
		this.bonusPoint = bonusPoint;
	}
	public void setPhone(String phone) {
		this.phone = phone;
	}
	public void setAddress(String address) {
		this.address = address;
	}
	
	/* 접근자(getter) 메소드 */
	public int getNumber() {
		return number;
	}
	public String getName() {
		return name;
	}
	public String getDept() {
		return dept;
	}
	public String getJob() {
		return job;
	}
	public int getAge() {
		return age;
	}
	public char getGender() {
		return gender;
	}
	public int getSalary() {
		return salary;
	}
	public double getBonusPoint() {
		return bonusPoint;
	}
	public String getPhone() {
		return phone;
	}
	public String getAddress() {
		return address;
	}

}

package com.greedy.level03.hard.emp.run;

import java.util.Scanner;

import com.greedy.level03.hard.emp.model.dto.EmployeeDTO;

public class Application {

	public static void main(String[] args) {
		
		EmployeeDTO emp = new EmployeeDTO();
		
		Scanner scanner = new Scanner(System.in);
		
		System.out.print("사번을 입력하세요 : ");
		int num = scanner.nextInt();
		emp.setNumber(num);
		
		System.out.print("이름을 입력하세요 : "); //개행
		scanner.nextLine();
		String name = scanner.nextLine();
		emp.setName(name);
		
		System.out.print("부서를 입력하세요 : ");
		String dept = scanner.nextLine();
		emp.setDept(dept);
		
		System.out.print("직급을 입력하세요 : ");
		String job = scanner.nextLine();
		emp.setJob(job);
		
		System.out.print("나이를 입력하세요 : ");
		int age = scanner.nextInt();
		emp.setAge(age);
		
		System.out.print("성별을 입력하세요 : ");
		char gender = scanner.next().charAt(0);
		emp.setGender(gender);
		
		System.out.print("급여를 입력하세요 : ");
		int salary = scanner.nextInt();
		emp.setSalary(salary);
		
		System.out.print("보너스포인트를 입력하세요 : ");
		double bonusPoint = scanner.nextDouble();
		emp.setBonusPoint(bonusPoint);
		
		System.out.print("휴대폰 번호를 입력하세요 : "); //개행
		scanner.nextLine();
		String phone = scanner.nextLine();
		emp.setPhone(phone);
		
		System.out.print("주소를 입력하세요 : ");
		String address = scanner.nextLine();
		emp.setAddress(address);
		
		System.out.println(emp.getNumber());
		System.out.println(emp.getName());
		System.out.println(emp.getDept());
		System.out.println(emp.getJob());
		System.out.println(emp.getAge());
		System.out.println(emp.getGender());
		System.out.println(emp.getSalary());
		System.out.println(emp.getBonusPoint());
		System.out.println(emp.getPhone());
		System.out.println(emp.getAddress());
        
        scanner.close();
		
	}

}

 

ADVANCED1. 삼각형-사각형 도형 정보 출력하기 ✅

========= 삼각형 계산기 =========
1. 삼각형 둘레 구하기
2. 삼각형 면적 구하기
3. 선택한 도형 정보 출력하기
4. 도형 색상 칠하기
9. 메인으로 돌아가기
메뉴를 선택하세요. > 3
선택하신 도형 타입 : 삼각형
높이 : 20.0
넓이 : 20.0
색상 : blue

ShapeDTO.class

package com.reminder.class_and_object_practice.shape.model.dto;

public class ShapeDTO {
	
	private int type;
	private double height;
	private double width;
	private String color;
	
	public ShapeDTO(int type, double height, double width) { //String만 빠짐
		this.type = type;
		this.height = height;
		this.width = width;
		this.color = "white"; //color값 초기화
	}
	
	public void setType(int type) {
		this.type = type;
	}
	public void setHeight(double height) {
		this.height = height;
	}
	public void setWidth(double width) {
		this.width = width;
	}
	public void setColor(String color) {
		this.color = color;
	}
	
	public int getType() {
		return type;
	}
	public double getHeight() {
		return height;
	}
	public double getWidth() {
		return width;
	}
	public String getColor() {
		return color;
	}

}

 

ShapeMenu.class

package com.reminder.class_and_object_practice.shape.views;

import java.util.Scanner;

import com.reminder.class_and_object_practice.shape.manager.SquareManager;
import com.reminder.class_and_object_practice.shape.manager.TriangleManager;
import com.reminder.class_and_object_practice.shape.model.dto.ShapeDTO;

public class ShapeMenu {

	Scanner scanner = new Scanner(System.in);

	public void mainMenu() {

		double height=0;
		double width=0;
		int choice=0;

		while(true) {
			System.out.println("========== 도형 계산기 ==========");
			System.out.println("3. 삼각형");
			System.out.println("4. 사각형");
			System.out.println("9. 프로그램 종료");
			System.out.println("==============================");
			System.out.print("계산하려는 도형을 선택하세요. > ");
			choice = scanner.nextInt();

			if(choice != 3 && choice != 4 && choice != 9) {
				System.out.println("계산할 수 없는 도형입니다. 다시 입력하세요.");
				continue;
			} else if(choice == 9) {
				System.out.println("프로그램을 종료합니다.");
				return;
			}
			System.out.print("도형의 높이를 입력하세요. > ");
			height = scanner.nextDouble();
			System.out.print("도형의 너비를 입력하세요. > ");
			width = scanner.nextDouble();

			ShapeDTO shape = new ShapeDTO(choice, width, width); //type자리가 choice로 자동 변환됨

			switch(shape.getType()) {
			case 3: triangleMenu(shape); break;
			case 4: squareMenu(shape); break;
			}
		}
	}

	private void triangleMenu(ShapeDTO shape) {
		
		TriangleManager triangleManager = new TriangleManager();
		
		while(true) { //반복문에 넣어야 변경한 color 값이 반영됨
			System.out.println("========= 삼각형 계산기 =========");
			System.out.println("1. 삼각형 둘레 구하기");
			System.out.println("2. 삼각형 면적 구하기");
			System.out.println("3. 선택한 도형 정보 출력하기");
			System.out.println("4. 도형 색상 칠하기");
			System.out.println("9. 메인으로 돌아가기");
			System.out.print("메뉴를 선택하세요. > ");
			int choice = scanner.nextInt();

			switch(choice) {
				case 1: triangleManager.calcPerimeter(shape); break;
				case 2: triangleManager.calcArea(shape); break;
				case 3: triangleManager.printShape(shape); break;
				case 4: triangleManager.paintColor(shape, inputColor()); break; //color 대신 하단 inputColor() 메소드로 변경해야 컴파일 에러 사라짐
				case 9: System.out.println("메인으로 돌아갑니다."); return; //mainMenu 호출 아닌 return;
				default: System.out.println("잘못된 번호입니다. 메뉴를 다시 선택해 주세요."); break;
			}
		}
	}
	private void squareMenu(ShapeDTO shape) {
		
		SquareManager squareManager = new SquareManager();
		
		while(true) {
			System.out.println("========= 사각형 계산기 =========");
			System.out.println("1. 사각형 둘레 구하기");
			System.out.println("2. 사각형 면적 구하기");
			System.out.println("3. 선택한 도형 정보 출력하기");
			System.out.println("4. 도형 색상 칠하기");
			System.out.println("9. 메인으로 돌아가기");
			System.out.print("메뉴를 선택하세요. > ");
			int choice = scanner.nextInt();
			
			switch(choice) {
				case 1: squareManager.calcPerimeter(shape); break;
				case 2: squareManager.calcArea(shape); break;
				case 3: squareManager.printShape(shape); break;
				case 4: squareManager.paintColor(shape, inputColor()); break; //color 대신 하단 inputColor() 메소드로 변경해야 컴파일 에러 사라짐
				case 9: System.out.println("메인으로 돌아갑니다."); return; //mainMenu 호출 아닌 return;
				default: System.out.println("잘못된 번호입니다. 메뉴를 다시 선택해 주세요."); break;
			}
		}
	}
	
	private String inputColor() {
		System.out.print("어떤 색으로 도형을 칠할까요? > ");
		scanner.nextLine(); //개행
		String color = scanner.nextLine();
		return color;
	}

}

 

TriangleManager.class

package com.reminder.class_and_object_practice.shape.manager;

import com.reminder.class_and_object_practice.shape.model.dto.ShapeDTO;

public class TriangleManager {
	
	public void calcPerimeter(ShapeDTO shape) {
		double height = shape.getHeight();
		double width = shape.getWidth();
		
		double hypotenuse = Math.sqrt(height * height + width * width); //빗변
		double perimeter = height + width + hypotenuse; //둘레
		
		System.out.println("삼각형의 둘레는 " + perimeter + "입니다.");
	}
	
	public void calcArea(ShapeDTO shape) {
		double height = shape.getHeight();
		double width = shape.getWidth();
		
		double area = height * width / 2; //면적
		
		System.out.println("삼각형의 면적은 " + area + "입니다.");
	}
	
	public void printShape(ShapeDTO shape) {
		System.out.println("선택하신 도형 타입 : 삼각형");
		System.out.println("높이 : " + shape.getHeight());
		System.out.println("넓이 : " + shape.getWidth());
		System.out.println("색상 : " + shape.getColor());
	}
	public void paintColor(ShapeDTO shape, String color) {
		shape.setColor(color);
		System.out.println("선택하신 삼각형의 색상을 " + color + "로 반영합니다.");
	}

}

 

SquareManager.class

package com.reminder.class_and_object_practice.shape.manager;

import com.reminder.class_and_object_practice.shape.model.dto.ShapeDTO;

public class SquareManager {
	
	public void calcPerimeter(ShapeDTO shape) {
		double height = shape.getHeight();
		double width = shape.getWidth();
		double perimeter = (height + width) * 2;
		
		System.out.println("사각형의 둘레는 " + perimeter + "입니다.");
	}
	
	public void calcArea(ShapeDTO shape) {
		double height = shape.getHeight();
		double width = shape.getWidth();
		double area = height * width;
	}
	
	public void printShape(ShapeDTO shape) {
		System.out.println("선택하신 도형 타입 : 사각형");
		System.out.println("높이 : " + shape.getHeight());
		System.out.println("넓이 : " + shape.getWidth());
		System.out.println("색상 : " + shape.getColor());
	}
	
	public void paintColor(ShapeDTO shape, String color) {
		shape.setColor(color);
		System.out.println("선택하신 사각형의 색상을 " + color + "로 반영합니다.");
	}

}

 

Application.class

package com.reminder.class_and_object_practice.shape.run;

import com.reminder.class_and_object_practice.shape.views.ShapeMenu;

public class Application {

	public static void main(String[] args) {
		
		ShapeMenu shapeMenu = new ShapeMenu();
		shapeMenu.mainMenu();

	}

}