14章 解答4 根据指定不同字符,生成不同三角形

public class Demo {public void l(int row,String ch){for(int i=0;i<row;i++){for (int j = 1; j <= i+1; j++){System.out.print(ch);}System.out.println(" ");}}}import java.util.Scanner;public class Text {public static void main(String[] args) {Demo s = new Demo();Scanner input = new Scanner(System.in);System.out.print("请输入行高:");int row = input.nextInt();System.out.print("请输入打印的字符:");String ch=input.next();s.l(row,ch);}}