Consider an interface

public interface NumberFormatter

{

String format (int n);

}

Provide four additional classes that implement this interface.

COP3337 Assignment 4

A DefaultFormatter formats an integer in the usual way.

A DecimalSeparatorFormatter formats an integer with decimal separators; for example,

one million as 1,000,000.

An AccountingFormatter formats negative numbers with parenthesis; for example, -1 as (1).

A BaseFormatter formats the number as base n, where n is any number between 2 and 36 that is provided in the constructor.

I have provided the test class which should be included in the submission. It is called NumberFormatterTester.java. Please do not change this class.

Your project should have six classes included in the submission.

/**

Class to test the format method from classes that implement the NumberFormatter interface

*/

public class NumberFormatterTester

{

public static void main(String[] args)

{

final int small = 5;

final int neg = -10000;

final int large = 1000000;

final int maxBase = 36;

NumberFormatter numFormat;

numFormat = new DefaultFormatter();

System.out.println ("Default: " + numFormat.format(small) + " " + numFormat.format(neg) + " " +

numFormat.format(large) + " " + numFormat.format(maxBase));

System.out.println ("Expected: 5 -10000 1000000 36");

numFormat = new DecimalSeparatorFormatter();

System.out.println ("Decimal: " + numFormat.format(small) + " " + numFormat.format(neg) + " " +

numFormat.format(large) + " " + numFormat.format(maxBase));

System.out.println ("Expected: 5 -10,000 1,000,000 36");

numFormat = new AccountingFormatter();

System.out.println ("Accounting: " + numFormat.format(small) + " " + numFormat.format(neg) + " " +

numFormat.format(large) + " " + numFormat.format(maxBase));

System.out.println ("Expected: 5 (10000) 1000000 36");

numFormat = new BaseFormatter(2); // Binary System

System.out.println ("Base 2 : " + numFormat.format(small) + " " + numFormat.format(neg) + " " +

numFormat.format(large) + " " + numFormat.format(maxBase));

System.out.println ("Expected: 101 -10011100010000 11110100001001000000 100100");

numFormat = new BaseFormatter(8); // Octal System

System.out.println ("Base 8 : " + numFormat.format(small) + " " + numFormat.format(neg) + " " +

numFormat.format(large) + " " + numFormat.format(maxBase));

System.out.println ("Expected: 5 -23420 3641100 44");

numFormat = new BaseFormatter(20); // Base 20

System.out.println ("Base 20 : " + numFormat.format(small) + " " + numFormat.format(neg) + " " +

numFormat.format(large) + " " + numFormat.format(maxBase));

System.out.println ("Expected: 5 -1500 65000 1g");

numFormat = new BaseFormatter(36); // Base 36

System.out.println ("Base 36 : " + numFormat.format(small) + " " + numFormat.format(neg) + " " +

numFormat.format(large) + " " + numFormat.format(maxBase));

System.out.println ("Expected: 5 -7ps lfls 10");

}

}