Converting Numbers to Different Numerical Systems in JAVA

You may have to change the numbers from one format to other format, as like from decimal to hexagon . Here i have tried the different approach where you can convert from one numerical system to other numerical system using the digits in that numerical system.

For Example , if i want to convert the 10 from decimal to hexagon. I will provide the input in the following format along with the number of Test Cases.
1
# input1: 10 0123456789 0123456789abcdef
# output: a

Here is the logic for that written in JAVA language.

import java.lang.*;
import java.util.*;

public class Numbers{
    @ SuppressWarnings ("deprication")
    public static void main(String[] args)
    {   String result="";
        Scanner sc=new Scanner(System.in);
        int i=0,tests=Integer.parseInt(sc.next());
        while(i++<tests){
        String numbr=sc.next();
        String source_pattern=sc.next();
        String target_pattern=sc.next();
        Number_System source=new Number_System(source_pattern);
        Number_System target=new Number_System(target_pattern);
        result=result+"Case #"+i+": "+target.genValue(source.genDeciValue(numbr))+"\n";
            }
        System.out.print(result);
    }
}

class Number_System{
    int len=0;
    String pattern;
    public Number_System(String seq){
    len=seq.length();
    pattern=seq; }
    
    public int genDeciValue(String x){
        int i=0,v,str_len=x.length();
        Double value=new Double(0.0);
        while(i<str_len){
            v=pattern.indexOf(x.charAt(str_len-i-1));
            value=v*Math.pow(len,i)+value;
            i++;
        }
        return value.intValue();
    }
    
    public String genValue(int x){
        String res="";
        while(x!=0)
        {
            if(x<len){ res=pattern.charAt(x)+""+res; break; }
            res=pattern.charAt(x%len)+""+res;
            x=x/len;
        }
        return res;
    }
}

Smart Siva

Author & Editor

In Life every second is important, In programming every line of code is important.