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문제 1번

class Employee{
    String name;
    int age;
    String address;
    String department;
    int salary;

    Employee (String name, int age, String address, String department){
        this.name = name;
        this.age = age;
        this.address = address;
        this.department = department;
    }

    public void printInfo(){
        System.out.println("이름: " + name);
        System.out.println("나이: " + age);
        System.out.println("주소: " + address);
        System.out.println("부서: " + department);
    }
}

class Regular extends Employee{

    Regular(String name, int age, String address, String department) {
        super(name, age, address, department);
    }

    public void setSalary(int salary){
        this.salary = salary;
    }

    @Override
    public void printInfo(){
        super.printInfo();
        System.out.println("정규직");
        System.out.println("월급: " + salary);
    }
}

class Temporary extends Employee{

    int workHours;
    int timeSalary = 10000;

    Temporary(String name, int age, String address, String department) {
        super(name, age, address, department);
    }

    public void setWorkHours(int workHours){
        this.workHours = workHours;
        this.salary = workHours*timeSalary;
    }

    @Override
    public void printInfo(){
        super.printInfo();
        System.out.println("비정규직");
        System.out.println("일한 시간: " + workHours);
        System.out.println("급여: " + salary);
    }

}

public class EmployeeTest {
    public static void main(String[] args) {

        Regular r = new Regular("이순신", 35, "서울", "인사부");
        Temporary t = new Temporary("장보고", 25, "인천", "경리부");

        r.setSalary(5000000);
        r.printInfo();

        t.setWorkHours(120);
        t.printInfo();
    }
}
Java
복사

문제2

//1. 클래스를 따로 생성하여 처리하는 방법

//class Sort{
//    public void bubbleSort(int [] bubble){
//        for (int i = 0; i < bubble.length; i++){
//            for (int j = 0; j < bubble.length -i -1; j++){
//                if (bubble[j] > bubble[j+1]){
//                    int temp = bubble[j];
//                    bubble[j] = bubble[j+1];
//                    bubble[j+1] = temp;
//                }
//            }
//        }
//        for (int i = 0; i < bubble.length; i++){
//            System.out.print(bubble[i] + " ");
//        }
//    }
//}


import java.util.Arrays;

public class BubbleSort {
    //2. 클래스 내에 함수를 생성하여 처리
    public void bubbleSort(int [] bubble){  //정렬하는 함수 생성
        for (int i = 0; i < bubble.length; i++){
            for (int j = 0; j < bubble.length - i - 1; j++){
                if (bubble[j] > bubble[j+1]){
                    int temp = bubble[j];
                    bubble[j] = bubble[j+1];
                    bubble[j+1] = temp;
                }
            }
        }
        //1-1.for문을 활용한 출력
        for (int i = 0; i < bubble.length; i++){
            System.out.print(bubble[i] + " ");
        }

        System.out.println();

        //1-2.Arrays toStirng 메소드를 활용한 출력
        System.out.println(Arrays.toString(bubble));
    }
    public static void main(String[] args) {

        int[] bubble = {7,4,5,1,3};

        //1. 개별 클래스 생성시 객체 선언
        //Sort sort = new Sort();


        //2. 클래스 내부 메소드 생성시 객체 선언
        BubbleSort sort = new BubbleSort();
        sort.bubbleSort(bubble);


        //Arrays 내부 sort 메소드를 활용한 정렬 및 출력 - 듀얼피봇 퀵정렬
        Arrays.sort(bubble);
        for (int b: bubble) {
            System.out.print(b + " ");
        }
    }
}
Java
복사

문제 3

class Shape{
    private double width;
    private double height;

    public double getArea(){
        return 0.0;
    }
}

class Triangle extends Shape{
    private double width;
    private double height;

    public Triangle(double width, double height){
        this.width = width;
        this.height = height;
    }

    @Override
    public double getArea(){
        return width*height/2.0;
    }
}

class Rectangle extends Shape{
    private double width;
    private double height;

    public Rectangle(int width, int height){
        this.width = width;
        this.height = height;
    }

    @Override
    public double getArea(){
        return width*height;
    }
}

public class Poly {
    public static void main(String[] args) {

        Shape[] shape = {new Triangle(10,10), new Rectangle(10,10)};

        double sumArea = 0;

        for (Shape s : shape){
            sumArea += s.getArea();
        }

        System.out.println(sumArea);
    }
}
Java
복사