打印三角形
public class Demo8 { //打印三角形 public static void main(String[] args) { /* * *** ***** ******* ********* */ for (int i = 1; i<=5 ; i++) { for (int j = 5; j>i; j--) { System.out.print(" "); } for (int j = 0; j<i ; j++) { System.out.print("*"); } for (int j = 1; j <i ; j++) { System.out.print("*"); } System.out.println(); } } }