打印:
public class test{ public static void main(String args[]){ fun(9); } public static void fun(int n){ for(int i=1; i<=n; i++){ StringBuffer s = new StringBuffer(""); StringBuffer o = new StringBuffer(""); for(int j=1; j<=n-i; j++){ s.append(" "); } for(int j=1; j<=2*i-1; j++){ o.append("o"); } System.out.print(s); System.out.print(o); System.out.println(); } } }