1: //输入正整数n，输出由n行n列星号字符组成的三角星图案。例如n=4:

2: /*

3:        *

4:      *  *

5:    *  *  *

6:  *  *  *  *

7:  */

8: import java.io.*;

9: public class t2_8{

10:   public static void main(String argv[]){

11:     String strn = null;

12:     BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

13:     System.out.println("Please input n :");

14:     try {

15:       strn = in.readLine();

16:     } catch (IOException e) {

17:       // TODO 自动生成的 catch 块

18:       e.printStackTrace();

19:     }

20:     int n = Integer.parseInt(strn);

21:     char str[] = new char[n];

22:     for(int i=1;i<=n;i++)

23:     {

24:       str[n-i] = '*';

25:       strn = new String(str);

26:       System.out.println(strn);

27:     }

28:   }

29: }