如何让这个try-catch循环，直到它不再出错？

Question

我有一个try-catch块，它检查来自Scanner的输入是否为int。但它只是一次又一次地循环询问要发送多少人。。然后说错误：不是一个数字。没有实际提示用户输入不同的数字。

        int peopleToSend = 0;

        //I attempted to do a try catch... but it isn't working how I planned it...
        while(peopleToSend < 1 || peopleToSend > peopleAlive()){
            try {
                System.out.print("\nHow many people would you like to send out? 1 - " + peopleAlive() + ": ");

                peopleToSend = scan.nextInt();
            } catch (Exception e) {
                System.out.println("Error: Not a number.");
            }
        }

输入int以外的内容时的输出示例。

How many people would you like to send out? 1 - 22: Error: Not a number.

How many people would you like to send out? 1 - 22: Error: Not a number.

How many people would you like to send out? 1 - 22: Error: Not a number.

How many people would you like to send out? 1 - 22: Error: Not a number.

*loops forever*

Answer 1

只需在try块中编写while循环

Answer 2

添加扫描。next（） 语句：

        catch (Exception e) {
            System.out.println("Error: Not a number.");
            scan.next();
        }