송민지

상속

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

    public Employee(){
    }

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

    public void set_salary(int salary){
    }

    public void printInfo(){
    }
    public void set_workhours(int time){
        
    }
}

class Regular extends Employee{
    int salary;
    public Regular(String name, int age, String address, String department){
        super(name, age, address, department);
    }

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

    public void printInfo(){
        System.out.println("이름 : " + super.name);
        System.out.println("나이 : " + super.age);
        System.out.println("주소 : " + super.address);
        System.out.println("부서 : " + super.department);
        System.out.println("정규직 \n" + "월급 : " + salary + "\n");
    }
}

class Temporary extends Employee{
    int time;
    int per_h = 10000;
    int salary;

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

    public void set_workhours(int time){
        this.time = time;
        salary = this.per_h * time;
    }

    public void printInfo(){
        System.out.println("이름 : " + super.name);
        System.out.println("나이 : " + super.age);
        System.out.println("주소 : " + super.address);
        System.out.println("부서 : " + super.department);
        System.out.println("비정규직 \n" + "일한 시간 : " + time + "\n" + "급여 : " +  salary);
    }
}

public class 상속_0926_01 {
    public static void main(String args[]){
        Regular r = new Regular("이순신", 35, "서울", "인사부");
		Temporary t = new Temporary("장보고", 25, "인천", "경리부");
		
		r.set_salary(5000000);
		r.printInfo();
		
		t.set_workhours(120);
		t.printInfo();
    }
}
JavaScript
복사

버블정렬 

import java.util.Arrays;

public class 버블정렬_0926_02 {
    public static void main(String args[]){
        int[] arr = {7, 4, 5, 1, 3};
        for(int i = 1; i < arr.length; i++) {
	        for(int j = 0; j < arr.length - i; j++) {
                    if(arr[i] < arr[j]){
                        swap(arr, i, j);
                    }
                }
            }
        for (int a : arr){
            System.out.print(a + " ");
        }

    // 우수인님 코드
    // Arrays 내부 sort 메소드를 활용한 정렬 및 출력 - 듀얼피봇 퀵정렬
    int[] bubble = {7,4,5,1,3};
    Arrays.sort(bubble);
    for (int b: bubble) {
        System.out.print(b + " ");
        }
    }

    // swap 메소드 - 두 배열의 값을 바꾸는 메소드 만들어 사용
    private static void swap(int[] a, int i, int j) {
		int temp = a[i];
		a[i] = a[j];
		a[j] = temp;
	    }
}
Java
복사

상속으로 도형 넓이 구하기

class Shape {
    int x, y;

    public Shape() {}

    public Shape(int x, int y) {
        this.x = x;
        this.y = y;
    }

    public int getArea() {
        return 0;
    }
}

class Rect extends Shape {
    public Rect(int x, int y) {
        super(x, y);
    }

    @Override
    public int getArea() {
        return super.x*super.y;
    }
}

class Triangle extends Shape {
    public Triangle(int x, int y) {
        super(x, y);
    }

    @Override
    public int getArea() {
        return (super.x*super.y)/2;
    }
}

public class Figure {

    public static void main(String[] args) {

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

        int sumArea = 0;

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

}
Java
복사