小白：如何去输出一个等腰三角形（数字或者星星）？

package kh88_chapter05;

import java.util.Scanner;

public class DigitalTraingle {

public static void main(String[] args) {
	// TODO Auto-generated method stub
	Scanner input=new Scanner (System.in);
    System.out.print("您需要输出几行：");
    int num=input.nextInt();
    for (int i = 1; i <= num; i++) {
        for (int j = 1; j <= num - i; j++) {
            System.out.print(" ");
        }
        for (int j = 1; j <= 2*i-1; j++) {
            System.out.print(i);
           // System.out.print("*");
        }
        System.out.println("");
    }


}

}