Java实现打印圣诞树

package model;
public class Tree {
	public static void main(String[] args) {
		// TODO 自动生成的方法存根
		//三角形
		for (int i = 1; i <= 6; i++) {
			for (int j = 1; j <= 6-i; j++) {
				System.out.print(" ");
			}
			for (int j = 1; j <= 2*i-1; j++) {
				System.out.print("*");
			}
			System.out.println();
		}
		//梯形
		for (int i = 1; i <= 4; i++) {
			for (int j = 1; j <= 4-i; j++) {
				System.out.print(" ");
			}
			for (int j = 1; j <= 2*i+2; j++) {
				System.out.print("*");
			}
			System.out.println();
		}
		//矩形
		for (int i = 1; i <= 5; i++) {
			System.out.print("  ");
			for (int j = 0; j <= 5; j++) {
				System.out.print("*");
			}
			System.out.println();
		}
	}
}