반복문 문제) while + char

package Loop;

public class exam_loop_AZ {

	public static void main(String[] args) {

		System.out.println("==========과제1=========");

		char ch_2 = 'A';
		char ch_3 = 'A';
		int k = 1;
		//65 66 67 68 69 70
		//71 72 73 74 75 76
		//77 78 79 80 81 82
		//83 84 85 86 87 88
		//89 90
		
		while(ch_2 <= 'Z') {
			if ( (int)ch_2 == (int)ch_3 - 1 + (k * 6) ) {
				System.out.println(ch_2);
				k++;
			} else {
				System.out.print(ch_2);
			}
			ch_2++;
		}
		System.out.println("-----------------------------");
	}

}