java 数字菱形简单代码

public class number {

public static void main(String[] args) {

int i=1,j=1;
for (i=-8;i<=8;i++)
{
for(j=1;j<=8+9-Math.abs(i);j++) {
if(9-Math.abs(i)+j<=9)
System.out.print(" ");
else
System.out.print(1+Math.abs(9-j));

}
System.out.println();
}
}

}