17번<>

package JavaFestival;

public class jar17 {

	public static void main(String[] args) {
		String score = "A,A,B,C,D,A,C,D,D,D,F";
		int a=0;
		int b=0;
		int c=0;
		int d=0;
		int f=0;
		
		String[] score2 = score.split(",");
		
		for(int i=0; i<score2.length;i++) {
			if(score2[i].equals("A")) {
				a++;
			}else if(score2[i].equals("B")) {
				b++;
			}else if(score2[i].equals("C")) {
				c++;
			}else if(score2[i].equals("D")) {
				d++;
			}else {
				f++;
			}
		}
		System.out.println("A : " + a+"명");
		System.out.println("B : " + b+"명");
		System.out.println("C : " + c+"명");
		System.out.println("D : " + d+"명");
		System.out.println("f : " + f+"명");
	}
}

문자열이기 때문에 equals로 해준다