java打印各种菱形

/**
 * 类说明
 *
 * @author 曾修建
 * @version 创建时间：2014-7-23 上午09:50:46
 */
public class Diamond {

	public static void getDia(int n) {
		System.out.println("第一个 ：");
		for (int i = 0; i < n/2+1; i++) {
			for (int j2 = 0; j2 < n/2+1-i; j2++) {
				System.out.print(" ");
			}
			for (int j2 = 0; j2 < 2*i+1; j2++) {
				System.out.print("+");
			}
			System.out.println();
		}

		for (int i = n/2; i > 0; i--) {
			for (int j = 0; j < n/2-i+2; j++) {
				System.out.print(" ");
			}
			for (int j = 0; j < 2*i-1; j++) {
				System.out.print("+");
			}
			System.out.println();
		}

		System.out.println("第二个 ：");
		for(int i = 1;i <= n;i++){
		    if(i <= n/2 + 1){
		        for(int k = 1;k <= n/2 + 1- i;k++){
		            System.out.print(" ");
		        }
		        for(int k = 1;k <= i;k++){
		            System.out.print("+ ");
		        }
		            System.out.println();
		    }else{
		        for(int k =1;k <= (i -(n/2 + 1));k++){
		            System.out.print(" ");
		        }
		        for(int k = 1;k <= (2 *(n/2 + 1) - i);k++){
		            System.out.print("+ ");
		        }
		        System.out.println();
		    }
		}

		System.out.println("第三个  ：");
		for(int k = 1;k <= n/2 + 1;k++){
		    for(int i = 1;i <= (n/2 + 1 - k);i++){
		        System.out.print(" ");
		    }
		    System.out.print("*");
		    for(int i = 1;i <= ( (k - 2) * 2 + 1);i++){
		        System.out.print(" ");
		    }
		    if(k != 1){
		        System.out.print("*");
		    }
		    System.out.println();
		}
		for(int k = n/2 ;k >=1;k--){
		    for(int i = 1;i <= (n/2 + 1 - k);i++){
		        System.out.print(" ");
		    }
		    System.out.print("*");
		    for(int i = 1;i <= ( (k - 2) * 2 + 1);i++){
		        System.out.print(" ");
		    }
		    if(k != 1){
		        System.out.print("*");
		    }
		    System.out.println();
		}
	}

	public static void main(String[] args) {
		getDia(9);
	}
}

结果如下：

第一个 ：

+

+++

+++++

+++++++

++++++++

+++++++

+++++

+++

+

第二个 ：

+

+ +

+ + +

+ + + +

+ + + + +

+ + + +

+ + +

+ +

+

第三个  ：

*

* *

*   *

*     *

*       *

*     *

*   *

* *

*