JAVA经典算法(十九)

题目：打印出如下图案（菱形）  

*  

***  

*****   

*******   

*****   

***  

*  

package cn.ls.lanqiao;

public class Test19 {

	public static void main(String[] args) {
		for (int i = 1; i <= 4; i++) {
			for (int j = 1; j <= 2 * i - 1; j++) {
				System.out.print("*");

			}
			System.out.println();
		}
		for (int i = 3; i >= 1; i--) {
			for (int j = 1; j <= 2 * i - 1; j++) {
				System.out.print("*");
			}
			System.out.println();
		}
	}
}

   *
  ***
 *****
*******
 *****
  ***
   *

package cn.ls.lanqiao;

public class Test19 {

	public static void main(String[] args) {
		for (int i = 1; i <= 4; i++) {
			for (int k = 1; k <= 4 - i; k++)
				System.out.print(" ");
			for (int j = 1; j <= 2 * i - 1; j++)
				System.out.print("*");
			System.out.println();
		}
		for (int i = 3; i >= 1; i--) {
			for (int j = 1; j <= 4 - i; j++) {
				System.out.print(" ");
			}
			for (int k = 1; k <= 2 * i - 1; k++) {
				System.out.print("*");
			}
			System.out.println();
		}
	}
}