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DecimalToAnyBase.java
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67 lines (53 loc) · 1.89 KB
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package Conversions;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
/**
*
* @author Varun Upadhyay (https://github.com/varunu28)
*
*/
// Driver Program
public class DecimalToAnyBase {
public static void main (String[] args) throws Exception{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter the decimal input below: ");
int decInput = Integer.parseInt(br.readLine());
System.out.println();
System.out.println("Enter the base below: ");
int base = Integer.parseInt(br.readLine());
System.out.println();
System.out.println("Decimal Input" + " is: " + decInput);
System.out.println("Value of " + decInput + " in base " + base + " is: " + convertToAnyBase(decInput, base));
br.close();
}
/**
* This method produces a String value of any given input decimal in any base
* @param inp Decimal of which we need the value in base in String format
* @return string format of the converted value in the given base
*/
public static String convertToAnyBase(int inp, int base) {
ArrayList<Character> charArr = new ArrayList<>();
while (inp > 0) {
charArr.add(reVal(inp%base));
inp /= base;
}
StringBuilder str = new StringBuilder(charArr.size());
for(Character ch: charArr)
{
str.append(ch);
}
return str.reverse().toString();
}
/**
* This method produces character value of the input integer and returns it
* @param num integer of which we need the character value of
* @return character value of input integer
*/
public static char reVal(int num) {
if (num >= 0 && num <= 9)
return (char)(num + '0');
else
return (char)(num - 10 + 'A');
}
}