方法不会从 while 循环返回值

Question

我写了这个方法，我一直得到初始值 0 并且想知道如何获得我在 while 循环中得到的新值

public static double PSize() {
    String size;
    int i = 0;
    double priceOfSize = 0;
    String pizzaS[] = {"Small", "Medium", "Large"};
    double pizzaP[] = {10.00, 15.00, 20.00};
    System.out.println("What size pizza would you like: Small, Medium, or Large?");
    Scanner sml = new Scanner(System.in);
    size = sml.next();
    while (i < 3) {
        if (pizzaS[i] == size) 
            priceOfSize = pizzaP[i];
            i += 1;
        
    }
    return priceOfSize;
}

Answer 1

Java 通过引用比较字符串，因此您必须按如下方式比较字符串。

if (pizzaS[i].equalsIgnoreCase(size))

检查这个其他堆栈溢出问题以获取更多信息。 希望这有帮助！

Answer 2

这位朋友...

public static double PSize() {
    String size;
    int i = 0;
    double priceOfSize = 0;
    String pizzaS[] = {"Small", "Medium", "Large"};
    double pizzaP[] = {10.00, 15.00, 20.00};
    System.out.println("What size pizza would you like: Small, Medium, or Large?");
    Scanner sml = new Scanner(System.in);
    size = sml.next();
    while (i < 3) {
        if (pizzaS[i].equalsIgnoreCase(size)) { 
            priceOfSize = pizzaP[i];
            break;
        }
        i += 1;
    }
    return priceOfSize;
}