题解 | #带空格直角三角形图案#

import java.util.Scanner;
import java.util.Collections;
public class Main{
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        while(scan.hasNextInt()) {
            int num = scan.nextInt();
            for(int i = 0; i < num; i++) {
                System.out.println(String.join("", Collections.nCopies(num - i - 1, "  ")) + 
                                 String.join("", Collections.nCopies(i + 1, "* ")));//前面空格一次整两个
            }
        }
    }
}