印聖誕樹

package com.sample;

import static java.lang.System.out;

public class ChristmasTree1 {

    public static void main(String[] args) {
        printTriangle(4, 2);
        printTriangle(4, 3);
        printTriangle(4, 4);
        printTrunk(4, 2);
    }

    private static void printTrunk(int width, int height) {
        width = width - 1;
        for (int i = 1; i <= height; i++) {
            for (int j = 1; j <= width; j++) {
                out.print(" ");
            }
            out.print("*");
            out.println();
        }
    }

    private static void printTriangle(int width, int height) {
        for (int i = 1; i <= height; i++) {
            for (int j = 1; j <= (width - i); j++) {
                out.print(" ");
            }
            for (int j = 1; j <= (2 * i) - 1; j++) {
                out.print("*");
            }
            out.println();
        }
    }
}