Question

In your book there is a Class method called Square that draws a square either using a border or a solid. Using that class, create a Square2 class that also prompts the user for the character to be printed (i.e. such as #, $, whatever) and if the user enters a blank character it defaults to *.

You’ll need to modify the called private methods in Square to accept a character passed.

Note that for the purposes of this Lab it is okay to prompt the user from the class methods.

Sample session:

M:\Java253>java Square2Driver

Enter width of desired square: 9

Area = 81

What character should be used for printing? (i.e. *) #

Print with (b)order or (s)olid? s

#########

#########

#########

#########

#########

#########

#########

#########

#########

/***********************************************************

* SquareDriver.java

* Dean & Dean

*

* This is the driver for the Square class. ***********************************************************/

import java.util.Scanner;

public class SquareDriver

{

public static void main(String[] args)

{   

Scanner stdIn = new Scanner(System.in);

   Square square;

   System.out.print("Enter width of desired square: ");

square = new Square(stdIn.nextInt());

   System.out.println("Area = " + square.getArea());   

square.draw();

} // end main

} // end class SquareDriver

/************************************************************
* Square.java
* Dean & Dean
*
* This class manages squares.
************************************************************/

import java.util.Scanner;

public class Square
{
private int width;

//*********************************************************

public Square(int width)
{
this.width = width;
}

//*********************************************************

public int getArea()
{
return this.width * this.width;
}

//*********************************************************

public void draw()
{
Scanner stdIn = new Scanner(System.in);

System.out.print("Print with (b)order or (s)olid? ");
if (stdIn.nextLine().charAt(0) == 'b')
{
drawBorderSquare();
}
else
{
drawSolidSquare();
}
} // end draw

//*****************************************************

private void drawBorderSquare()
{
drawHorizontalLine();
drawSides();
drawHorizontalLine();
} // end drawBorderSquare

//*****************************************************

private void drawSolidSquare()
{
for (int i=0; i<this.width; i++)
{
drawHorizontalLine();
}
} // end drawSolidSquare

//*****************************************************

private void drawHorizontalLine()
{
for (int i=0; i<this.width; i++)
{
System.out.print("*");
}
System.out.println();
} // end drawHorizontalLine

//*****************************************************

private void drawSides()
{
for (int i=1; i<(this.width-1); i++)
{
System.out.print("*");
for (int j=1; j<(this.width-1); j++)
{
System.out.print(" ");
}
System.out.println("*");
}
} // end drawSides
} // end class Square

Answer 1

Please find below the code for Square2.java

import java.util.Scanner;

public class Square2
{
private int width;

//*********************************************************

public Square2(int width)
{
this.width = width;
}

//*********************************************************

public int getArea()
{
return this.width * this.width;
}

//*********************************************************

public void draw()
{
Scanner stdIn = new Scanner(System.in);
System.out.print("Enter the charcter to be used for printing :: "); /*Get the charcater to be used for printing from user*/
char c = stdIn.nextLine().charAt(0); 
if(Character.compare(c, ' ')==0) /* if character is blank, replace it with **/
{
    c='*';
}
System.out.print("Print with (b)order or (s)olid? ");
if (stdIn.nextLine().charAt(0) == 'b')
{
drawBorderSquare(c);  /*pass character to function */
}
else
{
drawSolidSquare(c);  /*pass character to function */
}
} // end draw

//*****************************************************

private void drawBorderSquare(char ch)   /* accepted character as arguments */
{ 
drawHorizontalLine(ch);  /*pass character to function */
drawSides(ch);  /*pass character to function */
drawHorizontalLine(ch);  /*pass character to function */
} // end drawBorderSquare

//*****************************************************

private void drawSolidSquare(char ch)
{
for (int i=0; i<this.width; i++)
{
drawHorizontalLine(ch);   /*pass character to function */
}
} // end drawSolidSquare

//*****************************************************

private void drawHorizontalLine(char ch)
{
for (int i=0; i<this.width; i++)
{
System.out.print(ch);   /*used character passed to print */
}
System.out.println();
} // end drawHorizontalLine

//*****************************************************

private void drawSides(char ch)
{
for (int i=1; i<(this.width-1); i++)
{
System.out.print(ch);  /*used character passed to print */
for (int j=1; j<(this.width-1); j++)
{
System.out.print(" ");
}
System.out.println(ch);  /*used character passed to print */
}
} // end drawSides
} // end class Square

driver code

import java.util.Scanner;

public class Main
{
    public static void main(String[] args)
    {   
        Scanner stdIn = new Scanner(System.in);
        Square2 square;
        System.out.print("Enter width of desired square: ");
        square = new Square2(stdIn.nextInt());
        System.out.println("Area = " + square.getArea());   
        square.draw();
    } 
} // end class SquareDriver

output scrren shot::

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