Question

I need assistance writing this code. I keep generating errors and not sure what to do now.

Design and implement a method that will take any value as String (even it's a number!) and convert that value to a number in any base. Use the method;

private static ArrayList convertToBase(String value, int currentBase, int targetBase){

// your algorithm

return result; //which is a String array

}

Examples:
convertToBase("10011", 2, 10) should return [1, 9], meaning, (10011)base2 = (19)base10

convertToBase("100", 10, 8) should return [6, 4]

convertToBase("E12B0", 16, 2) should return [1,1,1,0,0,0,0,1,0,0,1,0,1,0,1,1,0,0,0,0]

convertToBase("1250", 10, 16) should return [4, E, 2]

Write a tester, make sure your code produces correct results.

Answer 1

import java.util.*;
public class Demo{
    public static ArrayList convertToBase(String value, int currentBase, int targetBase){
        String str=Integer.toString(Integer.parseInt(value, currentBase), targetBase);
        ArrayList<Character> result = new ArrayList<Character>();
        for (char c : str.toCharArray()) {
            result.add(Character.toUpperCase(c));
        }
        return result;
    }
    public static void main(String[] args){
        System.out.println(convertToBase("10011",2,10));
        System.out.println(convertToBase("100",8,10));
        System.out.println(convertToBase("100",10,8));
        System.out.println(convertToBase("E12B0",16,2));
        System.out.println(convertToBase("1250",10,16));
    }
}

Note:

->the output of convertBase("100",10,8) is [1,4,4]

->the output of convertBase("100",8,10) is [6,4]

It is given wrong in the question.

But i have printed both of the them

Below is the screenshot of the code for reference purpose:

output: