[java] 클래스(class) 연습문제 #3

안녕하세요 지코딩입니다.

 

오늘은 「java_an_introduction_to_problem_solving_and_programming_6th_edition」 366페이지 12번 문제를 풀어보겠습니다.

<문제>

출처: java_an_introduction_to_problem_solving_and_programming_6th_edition 

 

getter, setter 메소드를 사용하여 movie 클래스를 만들어보겠습니다.

 

 

public class Movie {
	private String name, mpaaRating;
	public double rated1 = 0;
	public double rated2 = 0;
	public double rated3 = 0;
	public double rated4 = 0;
	public double rated5 = 0;
	public double sum = 0;
	
	
	
	public void setName(String name) {
		this.name = name;
	}
	public void setMpaaRating(String mpaaRating) {
		this.mpaaRating = mpaaRating;
	}
	public String getName() {
		return name;
	}
	public String getMpaaRating() {
		return mpaaRating;
	}
	
	public void addRating(int rate) {
		if(rate>=1 && rate<=5) {
			if(rate == 1)
				rated1++;
			else if(rate == 2)
				rated2++;
			else if(rate == 3)
				rated3++;
			else if(rate == 4)
				rated4++;
			else if(rate == 5)
				rated5++;
			sum+=rate;
		}
	}
		
	public double getAverage(){
		return (sum/(rated1+rated2+rated3+rated4+rated5));
	}
	
	public boolean equals(Movie m) {
		return (this.name.equals(m.name) && 
				this.mpaaRating.equals(m.mpaaRating) &&
				this.rated1 == m.rated1 &&
				this.rated2 == m.rated2 &&
				this.rated3 == m.rated3 &&
				this.rated4 == m.rated4 &&
				this.rated5 == m.rated5);
				
	}
}

 

이 클래스를 메인함수에서 실행시켜보겠습니다.

 

public class MovieDemo {

	public static void main(String[] args) {
		boolean equality;
		double average1, average2;
		
		Movie movie1 = new Movie();
		movie1.setName("firstmovie");
		movie1.setMpaaRating("PG");
		movie1.addRating(1);
		movie1.addRating(3);
		movie1.addRating(2);
		movie1.addRating(4);
		movie1.addRating(4);
		average1 = movie1.getAverage();
		System.out.println("Average rating of firstmovie: " + average1);
		
		Movie movie2 = new Movie();
		movie2.setName("secondmovie");
		movie2.setMpaaRating("PG-13");
		movie2.addRating(1);
		movie2.addRating(3);
		movie2.addRating(3);
		movie2.addRating(4);
		movie2.addRating(4);
		average2 = movie2.getAverage();
		System.out.println("Average rating of secondmovie: " + average2);
		
		equality = movie2.equals(movie1);
		System.out.println(equality);
		

	}

}