Print number in a pyramid pattern

代码：

import java.util.Scanner;

public class Ten_six {
public static void main(String[] args) {
int a = 2;
;
for (int i = 0; i < 8; ++i) {
for (int j = 0; j < 8 - i - 1; j++) {
System.out.print("     ");
}
for (int k = 0; k < i + 1; k++) {
System.out.printf("%5d", (int) Math.pow(a, k));
}
for (int l = i; l > 0; l--) {
System.out.printf("%5d", (int) Math.pow(a, l - 1));
}
System.out.println();
}
}
}

运行结果;

<img src="http://img.blog.csdn.net/20151006202803877?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />