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