编辑代码

public class IterativeExample {
    public static void main(String[] args) {
        int n = 6; // 替换为所需的行数
        printNumbers(n);
    }

    public static void printNumbers(int n) {
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                System.out.print(i + " ");
            }
            System.out.println();
        }
    }
}