Write a Java program to display a specified pattern. Within your program you mus

Question

Write a Java program to display a specified pattern. Within your program you must define a recursive method with the following signature. public static void Patternl(int m, int n) Your program will ask the user to input two integers, the first one is for the number of the row in the pattern and the second one, which is between 0 and 9 inclusively, is for the entries in the pattern, and your program invokes the method. A sample run of your program is as follows. Please input the first integer. Please input the second integer. The pattern is as follows. Another sample run of your program is as follows. Please input the first integer. Please input the second integer. The pattern is as follows.

Explanation / Answer

import java.util.Scanner;

// Class Pattern definition

public class Pattern

{

// Recursive method to display pattern based on m and n value

// Variable m for number of rows

// Variable n for number to print

public static String pattern1(int m, int n)

{

// Checks if number of rows is less than or equals to zero return null

if( m <= 0 )

return "";

// Recursively calls the method by reducing the size of row by one each time

String p = pattern1(m - 1, n);

// Concatenates the number with string

p = p + n;

// Displays the string

System.out.println(p);

return p;

}// End of method

// main method definition

public static void main(String[] args)

{

// Scanner class object created

Scanner sc = new Scanner(System.in);

// Accepts data from the user

System.out.print(" Please input the first integer: ");

int first = sc.nextInt();

System.out.print(" Please input the second integer: ");

int second = sc.nextInt();

// Calls the method to display the result

pattern1(first, second);

}// End of main method

}// End of class

Sample Run 1:

Please input the first integer: 3

Please input the second integer: 0

0
00
000

Sample Run 2:

Please input the first integer: 5

Please input the second integer: 9

9
99
999
9999
99999

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