Java Programming 2. Task: Use nested for loops statements to draw empty boxes of

Question

Java Programming

2. Task: Use nested for loops statements to draw empty boxes of any character (input from user). The boxes have the same number of rows and columns (input from the user; valid range: 5 to 21). Test for errors in input (including type)

SAMPLE OUTPUT:

Do you want to start(Y/N): y

How many chars/last row? n

Not an integer! Try again! How many chars/last row? fgfgfg

Not an integer! Try again! How many chars/last row? 7.6

Not an integer! Try again! How many chars/last row? 34

ERROR! Valid range 5 - 21. How many chars/last row? 7

What character? k

kkkkkkk

k     k

k     k

k     k

k     k

k     k

kkkkkkk

Do you want to continue(Y/N): y

How many chars/last row? y

Not an integer! Try again! How many chars/last row? 9

What character? #

#########

#       #

#       #

#       #

#       #

#       #

#       #

#       #

#########

Do you want to continue(Y/N): n

Explanation / Answer

Given are the complete code along with comments:

import java.util.Scanner;
public class HelloWorld
{
public static void main(String[] args) {
Scanner input = new Scanner(System. in );

//VARIABLE DECLARATION//
char ans = 'n';
int row = 0;
char value = 'k';
do { // LOOP BEGIN//
System.out.println("DO YOU WANT TO START put Y OR N?");
ans = input.next().charAt(0);
if(ans == 'n' || ans == 'N'){// CHECKING FOR USR INPUT//
System.exit(0);
}
else
{
System.out.println("GIVE THE NUMBER OF ROWS");
while (!input.hasNextInt()) {
System.out.println("INPUT IS NOT VALID PLEASE PUT INTEGER VALUE:");
input.next();
}
row = input.nextInt();
while (row < 5 || row > 21) {
System.out.println("NOT VALID PUT (MINIMUM IS 5 AND MAXIMUM IS21). How many chars/last row?");
row = input.nextInt();
}
System.out.println("ENTER CHARACTER?");
value = input.next().charAt(0);

for (int i = 0; i < row; i++) { //nested for loop to create the box
System.out.print(value);
}
System.out.println();
for (int i = 0; i < row - 2; i++) {
System.out.print(value);
for (int j = 0; j < row - 2; j++) {
System.out.print(" ");
}
System.out.print(value);
System.out.println();
}
for (int i = 0; i < row; i++) {
System.out.print(value);
}
  
System.out.println();
System.out.println();
System.out.println("DO YOU WANT TO CONTINUE PUT Y OR N");
ans = input.next().charAt(0);
}
} while (ans== 'Y' || ans == 'y');

  }
}

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