我需要帮助从数组中进行选择

Question

基本上我需要在做出选择时传递价格并且不知道如何。

int selection;
String[] snacks = { "   (1): Chewing Gum", "   (2): Kit Kat", "   (3): Snickers", "   (4): Pop Tarts" };
int[] price = { 40, 75, 80, 90 };
System.out.println("Java Vending Machine");

for (int index = 0; index < snacks.length; index++) {
    System.out.println(snacks[index] + " -- " + price[index] + "¢");
}

Scanner keyboard = new Scanner(System.in);
selection = keyboard.nextInt(); 
return selection;

Answer 1

如果我理解你的问题，你只需要

// return selection;
return (selection > 0 && selection <= price.length) ? price[selection-1] : 0;

另一个例子，

// That ternary could also be written as
if (selection > 0 && selection <= price.length) {
  return price[selection-1];
}
return 0;