用java写三角形

package com.haoran.control;

public class triangle {
    public static void main(String[] args) {
        //输出一个三角形；
        for (int i = 1; i <= 5; i++) {
            for (int j1 = 5; j1 >i ; j1-- ){
                System.out.print(" ");
            }
            for (int j2 = 1; j2 <=i ; j2++ ){
                System.out.print("*");
            }
            for (int j2 = 1; j2