数字基站转换器程序没有显示答案

Question

这是我的作业，明天到期。我们必须在Bluej上编写一个带有Java的程序，其中一个数字必须转换为基数10，然后是另一种将数字从基数10转换为任何基数的方法。用户首先输入数字和基数，然后选择他们想要的方法。我正在为这个程序使用两个类：“Runner”和“Converter”。 My Runner类运行程序并询问用户输入什么，然后调用该方法。 Converter类有两种方法及其算法。 Runner类在下面，Convert类将在Runner下面：

 import java.util.Scanner;
 public class Runner
 {

  public static void main(String[]args)
  {

    Scanner scan = new Scanner(System.in);
    Converter calc = new Converter();
    System.out.println("Enter a number ::");
    int number = scan.nextInt();
    System.out.println("Enter a base number ::");
    int base = scan.nextInt();
    System.out.println();

    System.out.println("Press 1 to convert TO base 10.");
    System.out.println("Press 2 to convert FROM base 10.");
    int calculationKey = scan.nextInt();

    if (calculationKey == 1)
    {
        System.out.println(calc.convertToTen(number, base));
    }
    else if(calculationKey == 2)
    {
        System.out.println(calc.convertToBase(number, base));
    }

    else         
    {
        System.exit(0);
    }


  }
}

转换器类：

    import java.util.Scanner;


public class Converter
 {

    private int remainder, exponent, length, answer;

 public int convertToTen(int number, int base)
  {
    int num1 = number;

    length=0;
    while(number > 0 )
    {
        num1 = num1 / 10;
        length++;
    }
    int length2 = length;
    for (exponent = 0; exponent  <= length2; exponent++)
    {


        remainder = number % 10;
        answer = (remainder * (base ^ exponent));
        answer++;

    }

    return(answer); 
  }

  public int convertToBase(int number, int base)
  { 
    int num1 = number;
    while (number > 0)
    {
        number = number % base;

    }
    return remainder;

  }

}