for 小实例

使用for循环
打印一个9行的 实心菱形

 {
 		
 			int r=7;	
 			int t=0;			
 			for(int i=0;i<=5;i++){
 				for (int j1 = 1; j1 <=5-i; j1++) {
 				System.out.print(" ");													
 				}
 			t=2*i-1;
 			for (int j = 0; j < t; j++) {
 				
 					System.out.print("*");	
 															
 			}
 				System.out.println();
 			}
 												
 			for (int y = 0; y<=3; y++) {
 				for (int i1 = 1; i1 <=y+1; i1++) {
 					System.out.print(" ");
 				}
 				r=7-(2*y);													
 				for (int z = 0; z < r; z++) {
 					System.out.print("*");	
 				}										
 				System.out.println();
 			}	
 			System.out.println();
 		}
 		
  

  

输出结果：
~~~java
 	 *
    ***
   *****
  *******
 *********
  *******
   *****
    ***
     *