공책

public class MainClass {
    public static void main(String[] args) {
       // dottingStar();
       // reverseDottingStar();
       // invertDottingStar();
        dottingTree();
    }

    public static void dottingStar() {
        String result = "";
        for (int i = 0; i <= 5; i++) {
            for (int j = 0; j <= i; j++) {
                result += "*";
            }
            System.out.println(result);
            result = "";
        }
    }

    public static void reverseDottingStar() {
        String result = "";
        for (int i = 0; i <= 5; i++) {
            for (int j = 5 ; j >= i ; j-- ) {
                result += " ";
            }
            for (int k = 0; k <= i; k++) {
                result += "*";
            }
            System.out.println(result);
            result = "";
        }
    }
    
    public static void invertDottingStar() {
        String result ="";
        for (int i = 0 ; i <= 5 ; i++) {
            for (int j = 5 ; j >= i ; j--) {
                result += "*";
            }
            System.out.println(result);
            result = "";
        }
    }
    
    public static void dottingTree() {
        System.out.println(" ");
        String result ="";
        for (int i = 0 ; i <= 7 ; i ++) {
            for (int j = 14 ; j >= i ; j --) {
                result += " ";
            }
            if (i == 0) {
                result += "★  ";

            } else {
                for (int k = 0 ; k <= i ; k ++) {
                    result += "*";
                }
                for (int j = 0 ; j <= i ; j ++) {
                    result += "*";
                }
            }
            System.out.println(result);
            result = "";
        }
        System.out.println("\n" + "★ M E R R Y C H R I S T M A S ★");
    }
}

메리 크리스마스 !