package hello; public class sanjiaoxing1 { public static void main(String[] args) { //public static void main(String[] args) { for (int b = 1; b <= 5; b++) { //上部分 for (int c = 5 - b; c >= 0; c--) { System.out.print(" "); } for (int a = 1; a <= 2 * b - 1; a++) { System.out.print("*"); } System.out.println(); } for (int d = 4; d >= 1; d--) { //下部分 for (int c = 5 - d; c >= 0; c--) { System.out.print(" "); } for (int a = 2 * d - 1; a >= 1; a--) { System.out.print("*"); } System.out.println(); } } }