Java输出菱形

public class nn {
public static void main(String[] args)
{
	int size=11;
	if(size%2==0)
		size++;
	for(int i=0;i<size/2+1;i++)
	{
		for(int j=size/2+1;j>i+1;j--)
			System.out.print(" ");
		for(int j=0;j<2*i+1;j++)
		{
			if(j==0||j==2*i)
				System.out.print("*");
			else
				System.out.print(" ");
		}
		System.out.println("");
	}
	for(int i=size/2+1;i<size;i++)
	{
		for(int j=0;j<i-size/2;j++)
			System.out.print(" ");
		for(int j=0;j<2*size-1-2*i;j++)
		{
			if(j==0||j==2*(size-1-i))
				System.out.print("*");
			else
				System.out.print(" ");
		}
		System.out.println("");
	}
}
}