预测未来的学费

假设某个大学今年的学费是10000美金，且以每年7%的速度增加。多少年后学费会翻倍？

import java.util.*;
class Main {
  public static void main(String[] args){
    double tuition = 10000;
    int year = 1;
    while(tuition < 20000){
      tuition = tuition * 1.07;
      year++;
    }
    System.out.println("Tuition will be doubled in " + year + " years");
  }
}