Program in java to convert a number between any base

Program in java to convert a number between any base

One of my friend was looking for a Java program which can convert the given number of any base to any desired base number. So I thought to write a simple program for this.

First create a class “conversion”

public class conversion{

}

Create the main method and get the user inputs using scanner.

public class conversion{

  public static void main(String[] args) {

 System.out.println("Enter the number");

 Scanner marut= new Scanner(System.in);
     String number=marut.nextLine();

     System.out.println("Enter the Base of the number");

     int fromBase = marut.nextInt();

     System.out.println("Enter the Base to convert");

     int toBase = marut.nextInt();

   }

}

In above main method, we get the number with the base which we want to convert.

Number is read in

String number=marut.nextLine();

And we get the base of this number using

int fromBase = marut.nextInt();

As this will be a whole number, we consider it as integer.

Similarly we get the base to which this number has to be converted to using

int toBase = marut.nextInt();

Now create another method called as “convertFromBaseToBase” which actually converts the number.

public static String convertFromBaseToBase(String str, int fromBase, int toBase){

     //Convert from one base to other

     return Integer.toString(Integer.parseInt(str, fromBase), toBase);

 }

This method the number to be converted from base and to base as the arguments and returns the converted value in string.

Below is the code which does the trick:

Integer.toString(Integer.parseInt(str, fromBase), toBase)

Now in the main method we call this method to get the converted value and then print the result

String result=convertFromBaseToBase(number,fromBase,toBase);

System.out.println(“Converted value is: “+result);

the whole program looks like this:

package com.chapter2;

import java.util.Scanner;

public class conversion {

/**
* @param args
*/
public static void main(String[] args) {
System.out.println(“Enter the number”);
Scanner marut= new Scanner(System.in);

String number=marut.nextLine();
System.out.println(“Enter the Base of the number”);
int fromBase = marut.nextInt();
System.out.println(“Enter the Base to convert”);
int toBase = marut.nextInt();

String result=convertFromBaseToBase(number,fromBase,toBase);
System.out.println(“Converted value is: “+result);

}

public static String convertFromBaseToBase(String str, int fromBase, int toBase){
//convert from one base to another
return Integer.toString(Integer.parseInt(str, fromBase), toBase);
}

}

You can run this program and the result is as shown below:

That’s it. You can download this program here

conversion.java

Program in java to convert a number between any base

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