BaseConversion.java

1. Base conversion:

Conversion from base 10 to base 2-9

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

// BaseConversion.java

// Conversion from base 10 to base 2-9

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

import java.util.Scanner;

public class BaseConversion 

{

public static void main(String[] args) 

{

int base ;

int base10Num;

Scanner scan = new Scanner(System.in);

System.out.println ("Please enter a base (2-9): ");

base = scan.nextInt();

int maxNumber = (base*base*base*base-1);

System.out.println ("The maximum 4-digit number in base " + base +  " is " + maxNumber);

System.out.println ("");

System.out.println ("Please enter a base 10 number in the range 0 to " + (maxNumber) + " to convert: ");

System.out.println ("");

base10Num = scan.nextInt();

int place0 = base10Num % base;

int place1 = (base10Num / base) % base;

int place2 = (base10Num / (base*base)) % base;

int place3 = (base10Num / (base*base*base)) % base;

System.out.println ("");

System.out.println ((base10Num)+ " (base 10) = " +  place3+""+place2+""+place1+""+place0 + " (base " + (base) + ")");

}

}