Java控制台打印一个空心菱形

/** *//**


* HollowRhombus.java


* Java控制台打印一个空心菱形


* @author 邓超(CodingMouse)


* @version 0.1 2008-5-6


* 开发/测试环境：jdk1.6 + eclipse SDK 3.3.2


*/




//导入Scanner类


import java.util.Scanner;






public class HollowRhombus ...{






public static void main(String[] args) ...{




Scanner input = new Scanner(System.in);




//循环标识


boolean con = true;


//菱形的层数和转换计算方式后的层数


int border , num = 0;






do ...{


con = false;


System.out.print("请输入要打印的菱形层数[不小于3的奇(整)数]：");


//菱形的层数


border = input.nextInt();






if (border % 2 == 0 || border < 3) ...{


System.out.println("只能输入不小于3的奇(整)数！请重试！");


con = true;


}


} while (con);




//转换层数计算方式


num = border - (border - (border % 2)) / 2;




//控制台输出提示


System.out.println(border + "层空心菱形图案如下： ");




// 打印上半部分图象




for (int i = 1; i <= num; i++) ...{






for (int j = 1; j <= num - i; j++) ...{




System.out.print(" ");


}






for (int j = 1; j <= 2 * (i + 1) - 1; j++) ...{






if (j == 1 || j == 2 * (i + 1) - 3) ...{


//System.out.print("*"); //这样瘦长一点


System.out.print("* ");




} else ...{


//System.out.print(" "); //这样瘦长一点


System.out.print(" ");


}


}




System.out.println();


}




// 打印下半部分图象




for (int i = 1; i <= num - 1; i++) ...{






for (int j = 1; j <= i; j++) ...{


//System.out.print(" "); //这样瘦长一点


System.out.print(" ");


}




int k = num + 1 - i;






for (int j = 1; j <= 2 * k - 1; j++) ...{






if (j == 1 || j == 2 * k - 3) ...{


//System.out.print("*"); //这样瘦长一点


System.out.print("* ");




} else ...{


//System.out.print(" "); //这样瘦长一点


System.out.print(" ");


}


}




System.out.println();


}


}


}