java - 无返回类型的错误

Question

嗨，我的方法中出现错误，指出我的方法没有返回类型，这很令人困惑，因为它有返回类型；

public double getPhoneRates() {

    final int freeminutes=50;
    double totalcharge;
    double chargeperminute = 0.10;
    double d = 0;

    if(b.regularService() == true){
        if(b.getMinutes()<=50)
            return totalcharge=0;
        else 
            d=b.getMinutes()-freeminutes;

        d = d * chargeperminute;
        return totalcharge= freeminutes +d;
    }
}

Answer 1

试试这个:

public double getPhoneRates()
{
  final int freeminutes = 50;
  double chargeperminute = 0.10;
  double d = 0;
  if (b.regularService() == true)
  {
    if (b.getMinutes() <= 50) return 0; //return 0
    else d = b.getMinutes() - freeminutes; 
    d = d * chargeperminute; 
    return freeminutes + d; //return result
  }

  return -1; //some default value
}