java打印空心金字塔

代码如下：

	public static void main(String[] args) {
		int total;
		Scanner scan = new Scanner(System.in);
		total=scan.nextInt();
		int i=1;
		for(i=1;i<=total;i++){
			for(int k=1;k<=total-i;k++){
				System.out.print(" ");
			}
			for(int j=1;j<=i*2-1;j++){
				if((j==1||j==i*2-1)||i==total){
					System.out.print("*");
				}else{
					System.out.print(" ");
				}

			}
			System.out.println();
		}
	}