java - 创建一个程序，根据一些变量计算出航类价格。想要学习如何减少 if 语句的数量

Question

任务是根据以下因素计算客户的航类费用:他们飞往的城市、购买的成人座椅数量和购买的 child 座椅数量。

我仍然是编程初学者，希望找到一种方法来减少必须使用的 if 语句的数量。该程序按原样运行完美，但我认为它很草率。有什么建议么？

    int Johannesburg [] = {780,658}; //flight price for adult and child respectively
    int CapeTown [] = {1020,965}; 
    int Bloemfontein [] = {945,835}; 

    int totPrice = 0; // intialization of final price value

    String cityChoice = (String)cmbDest.getSelectedItem(); //city that the customer is flying to
    int adults = (Integer)jSpinner1.getValue(); //number of adults flying
    int kids = (Integer)jSpinner2.getValue(); //number of children flying 

    if(cityChoice.equals("Johannesburg")){
        totPrice = Johannesburg[0]*adults + Johannesburg[1]*kids;
    }
    if(cityChoice.equals("Cape Town")){
        totPrice = CapeTown[0]*adults + CapeTown[1]*kids;
    }
    if(cityChoice.equals("Bloemfontein")){
        totPrice = Bloemfontein[0]*adults + Bloemfontein[1]*kids;
    }
    jTextArea1.setText("Your booking for " + adults + " adult ticket(s) and " + kids + "children ticket(s) for " + cityChoice + " will cost R" + totPrice); //output statement

Answer 1

如果您使用的是 Java 7 或更高版本，则可以使用 switch 语句。请参阅此处的示例: https://docs.oracle.com/javase/8/docs/technotes/guides/language/strings-switch.html